JP2002339376A - Design method and drawing set of foundation structure of prefabricated house - Google Patents

Abstract

(57) [Problem] To easily design a foundation structure of a prefabricated house, particularly an integrated foundation having a basement, an underground garage, etc., and support a design method by a drawing set. A method of designing a foundation structure of a prefabricated house is to set a plurality of prefabricated houses having different specifications, and to provide a sectional shape, a reinforcing bar diameter and a pitch for beams and footings or slabs constituting the foundation structure for each prefabricated house. Of the prefabricated house of the objective prefabricated house, in which the beams are set as eccentric beams or concentric beams, and the allowable shear force and / or the allowable bending moment are calculated for each beam and each footing or slab. In designing the foundation structure, select a beam and footing or slab that has the allowable shear force and / or allowable bending moment that satisfies the stress of each part calculated as a result of the structural calculation, and combine the selected beam and footing or slab. Design the substructure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for designing a foundation structure of a prefabricated house or an integrated foundation / basement structure in which a foundation and an underground structure represented by a basement are integrated, and supports the design method. And a drawing set to be executed.

[0002]

2. Description of the Related Art A prefabricated house is a low-rise building constructed using a large number of members manufactured by an industrialized production system. Prefabricated houses were developed with the primary objective of pursuing a rational building structure to improve livability and durability, and to increase the degree of freedom in partitioning along with longer life, and to further reduce costs. ing.

[0003] Recently, various types of prefabricated houses having different specifications in layout, structure, appearance performance and the like have been provided so as to be able to respond to various demands of customers. Even in these prefabricated houses, since they are low-rise buildings, the total weight is small and the burden load on the foundation structure is small. For this reason, the effect of the change in the ground bearing capacity of the site on the foundation structure is small.

[0004] On the other hand, since the basement is not included in the floor area ratio, the demand for prefabricated houses with basements is increasing, but the absolute number is not large yet. Therefore, the underground integrated structure in the house is not prefabricated, and the reinforced concrete (RC) structure is not suitable for prefabrication in the first place. For this reason, designers of prefabricated houses are not actually accustomed to designing RC structures.

[0005]

As described above, the foundation structure of the prefabricated house is small because the weight of the prefabricated house is small. Sometimes. In this case, it will be disadvantageous in terms of cost, so if the foundation structure is designed appropriately for the prefabricated house to be built, the thickness of the foundation beam will be thinner and it will be difficult to arrange the reinforcement, and the work on site There is a case where a problem that the property is impaired may occur.

When designing a structure in which a foundation and a basement are integrated, beams, footings or slabs and walls are intricately associated with each other, and reinforcing bars for integrating them are arranged in a complicated manner vertically and horizontally. Will be done. However, designers of prefabricated houses do not have enough experience in designing RC structures, and RC buildings are usually four or five stories or more. However, the structure in which the basement and the basement whose upper structure is a prefabricated house is integrated is only one floor at most as a structure, and the above-mentioned official design guidelines cannot be applied. Is common. For this reason, there is a possibility that an unreasonable foundation structure having a poor balance between the amount of reinforcing bars and the thickness of concrete may be designed.

For example, when the amount of excavated earth and sand is increased, the cost of excavation and the cost of processing remaining soil are increased. Therefore, a design is sometimes made to improve the structural strength only by increasing the reinforcing bars without increasing the concrete thickness. In this case, the reinforcement amount of the reinforcing bar becomes too large compared to the concrete thickness, and as a result, the pitch of the reinforcing bar in the beam, the wall, and the slab becomes small, and the workability of the reinforcing bar work is hindered. In this case, there is a problem that the fitting of the reinforcing bar at the intersection of the above becomes complicated and the workability is deteriorated, the cover thickness of the reinforcing bar cannot be obtained, and in the worst case, the reinforcing bar itself cannot be installed.

Further, since many designers proceed independently to design the basic structure or the structure in which the base and the basement are integrated, the individuality of the designer is reflected for each house, and the correlation based on the unified idea is considered. Derived from the problem that it is not configured as a structure with the nature.

Further, the relationship between the anchor rebar for connecting the beams constituting the foundation structure or the structure in which the foundation and the basement are integrated with the upper structure is such that the anchor rebars and the rebar of the beam are well connected. However, if the relationship between the two is not clarified, there may be a problem that smooth connection may be difficult when performing bar arrangement work on site, and in some cases, There is also a problem that the anchor rebar itself cannot be installed.

An object of the present invention is to provide a method of designing a basic structure of a prefabricated house, which realizes a simple design of a reasonable basic structure based on a unified idea, and a drawing set capable of supporting this design method. Is to provide.

[0011]

In order to solve the above-mentioned problems, a method for designing a foundation structure of a prefabricated house according to the present invention comprises:
In advance, a plurality of prefabricated houses with different specifications are set, and for the beams and footings or slabs constituting the foundation structure for each set prefabricated house, the footing consisting of the cross-sectional shape and thickness of the beam consisting of the width and the width. Or set the cross-sectional shape of the slab, and set the amount of reinforcing bar consisting of the reinforcing bar diameter and pitch for each beam and each footing or slab,
Further, the respective beams are eccentric beams or concentric beams, and the allowable shearing force and / or the allowable bending moment are calculated for each beam and each footing or slab in which the amount of reinforcement is set, and the objective prefabricated house is calculated. In designing the basic structure, a beam and a footing or a slab having an allowable shear force and / or an allowable bending moment satisfying the stress of each part calculated as a result of the structural calculation for each house are provided with the above-described arrangement of the reinforcing bars and the allowable shear. The beam and / or footing or slab for which the force and / or the allowable bending moment has been calculated are selected from each other, and the selected beam and footing or slab are combined to construct a foundation structure.

In the method for designing a foundation structure of a prefabricated house (hereinafter referred to as a "basic design method"), a plurality of prefabricated houses having different specifications are assumed, and beams and footings constituting the foundation structure for each prefabricated house are used. Or, in the case of a slab, in the case of a beam, an anchor reinforcing bar for setting a cross-sectional shape consisting of a bar and a width and a reinforcing bar amount consisting of a diameter and a pitch of a reinforcing bar arranged in the cross-sectional shape and connecting an upper structure. Is set as an eccentric beam or a concentric beam, and in the case of footing or slab, the cross-sectional shape consisting of the thickness and the amount of reinforcing bar consisting of the diameter and pitch of the reinforcing bars arranged in the cross-sectional shape Set.

The sectional shape of the beam set as described above,
Although the amount of reinforcement, the cross-sectional shape of footing or slab, and the amount of reinforcement are different for each prefabricated house with different specifications, work is performed on each cross-sectional shape of beam, footing, and slab at the stage of setting these in advance. It is possible to set the amount of reinforcement that can appropriately cover the thickness without impairing the performance, and furthermore, it is possible to set the amount of reinforcement that can properly accommodate the connection of the reinforcing steel at the intersection of the beam and the footing or slab. I can do it.

As described above, the variables of the beam are:
Width, rebar diameter, pitch, eccentric beam, concentric beam, and by combining these, a plurality of beams can be configured. Similarly, variables of footing and slab are thickness, rebar diameter, and pitch, and by combining these, a plurality of footing and slab can be formed. Therefore, the allowable shearing force and the allowable bending moment or the allowable bending moment can be calculated for each beam, footing, and slab based on the above combination.

When designing the basic structure of a target prefabricated house, the structural calculation of the target prefabricated house is performed to calculate the stress of each part, and the allowable shear force and allowable bending moment satisfying the calculated stresses are exhibited. By selecting possible beams and footings or slabs and combining the selected beams and footings or slabs, it is possible to design an optimal foundation structure for the intended prefabricated house. Therefore, even when the prefabricated house is designed by a different designer, a reasonable basic structure can be easily designed based on the unified design concept.

[0016] The drawing set for designing the foundation structure of the prefabricated house sets prefabricated houses having different specifications.
For the beams that constitute the foundation structure of each prefabricated house, set a plurality of cross-sectional shapes with different widths and widths, and set a plurality of reinforcing bars with different diameters and pitches and eccentric beams or concentric beams, A beam cross-sectional view selected from among beams having the above-mentioned cross-sectional shapes, reinforcing bars, eccentric beams, and concentric beams, and cross-sectional dimensions, reinforcing bar specifications, allowable shears for each beam having different cross-sectional shapes and reinforcing bars. Beam numerical table that integrally describes the force and allowable bending moment, and for the footing or slab that constitutes the foundation structure for each of the prefabricated houses set, sets a plurality of cross-sectional shapes having different thicknesses and sets the rebar diameter and A footing or slab sectional view selected from among a plurality of reinforcing bars having different pitches and selected from the footing or slab in which the cross-sectional shape and the reinforcing bar amount are set, and a footing in which a different cross-sectional shape and a reinforcing bar amount are set. Or cross-sectional dimension for each slab, rebar specifications, is composed of a, a footing or slab numeric described integrally with acceptable bending moment.

In the drawing set for designing the basic structure of the prefabricated house (hereinafter referred to as "basic drawing set"), a plurality of prefabricated houses having different specifications are assumed in advance, and the beams constituting the basic structure for each prefabricated house are assumed. On the other hand, the relationship between the cross-sectional shape consisting of the width and the width of the reinforcing bar arranged in the cross-sectional shape and the amount of reinforcing bar consisting of the pitch and the anchor reinforcing bar connecting the upper structure is defined as an eccentric beam. By setting whether to be a concentric beam or a concentric beam, it has a cross-sectional shape and reinforcement amount corresponding to the foundation structure of a prefabricated house with different specifications,
In addition, a plurality of beams set as eccentric beams or concentric beams can be set.

Since the beam has a variable shape, width, rebar diameter, and pitch, each beam has a cross-sectional shape selected from these, and a cross-sectional view of the beam having the amount of reinforcement is created to form a beam cross-sectional view. Further, for example, it is possible to set a cross-sectional shape using a constant as a criterion and a variable as a width, and create a plurality of representative beam cross-sectional views showing the amount of reinforcement.

Also, because the beams having different widths and the amount of reinforcement for each beam are set, the allowable shear force and allowable bending moment of each beam can be calculated. Therefore, it is possible to create a beam numerical table in which the set values of the cross-sectional dimension consisting of the width, the reinforcing bar specifications, the allowable shear force and the allowable bending moment are integrally described for each set beam.

By arranging the beam sectional view and the beam numerical table prepared as described above side by side, when designing the foundation structure of the target prefabricated house, the structural calculation of the prefabricated house is performed and the beam of the beam is calculated. When the stress is calculated, an allowable shear force and an allowable bending moment that satisfy the calculated stress are selected from the above-mentioned beam numerical table, whereby the beam cross-sectional shape and the amount of reinforcement can be designed.

Further, for the footing or slab constituting the foundation structure, similarly to the case of the beam, the cross-sectional shape composed of the thickness, the diameter of the reinforcing bar arranged in the cross-sectional shape, and the reinforcement amount composed of the pitch are set. Thus, it is possible to set a plurality of footings or slabs having a cross-sectional shape and a reinforcement amount corresponding to the basic structure of a prefabricated house having different specifications.

The footing and the slab have a thickness, a reinforcing bar diameter,
Since the pitch is a variable, a footing and a slab cross-sectional view (hereinafter referred to as a “slab cross-sectional view”) are created by creating a cross-sectional view of a footing or slab having a cross-sectional shape and a reinforcement amount selected from these. I can do it.

By setting the footing and slab having different thicknesses and the amount of reinforcement for each footing and slab, the allowable bending moment of each slab and slab can be calculated. Therefore, the set footing, the cross-sectional dimension consisting of the thickness for each slab,
It is possible to create a footing and slab numerical table (hereinafter referred to as a “slab numerical table”) in which the reinforcing bar specifications and allowable bending moment values are integrally described.

By arranging the slab cross-sectional view and the slab numerical table prepared as described above side by side, when designing the foundation structure of the target prefabricated house, the structural calculation of the prefabricated house is performed and footing, When the stress of the slab is calculated, the allowable bending moment that satisfies the calculated stress is selected from the slab numerical table, whereby the footing and the cross-sectional shape of the slab and the amount of reinforcement can be designed.

Therefore, by describing the beam sectional view, beam numerical table, slab sectional view, and slab numerical table in one drawing, structural calculations are performed in designing the basic structure of the intended prefabricated house. After calculating the stress for each part, select and combine a beam, footing, and slab that can exhibit the allowable shear force and / or allowable bending moment that satisfies the numerical values calculated with reference to the basic drawing set. The basic structure of can be designed.

In the integrated foundation / basement structure according to the present invention, a plurality of prefabricated houses having different specifications are set in advance, and a beam and a footing constituting the integrated foundation / basement structure for each set prefabricated house. Or, for the slab and the wall, set the cross-sectional shape of the beam consisting of the width and the thickness and the cross-sectional shape of the slab and the wall, and set the cross-sectional shape of the beam and each footing or the slab and the wall to the reinforcing bar diameter and pitch. And the beams are eccentric beams or concentric beams, and the allowable shear force and / or the allowable bending moment for each beam and each footing or slab and wall for which the amount of reinforcement is set. The allowable shear force and / or allowable bending that satisfies the stress of each part calculated as a result of the structural calculation for each house in designing the foundation / basement integrated structure of the target prefabricated house A beam and a footing or a slab and a wall having a moment are selected and selected from each beam and each footing or a slab and a wall for which the amount of reinforcement is set and the allowable shear force and / or the allowable bending moment is calculated. It is characterized by designing an integrated foundation / underground structure by combining beams and footings or slabs and walls.

The design method of the prefabricated house foundation and underground integrated structure (hereinafter referred to as "integrated foundation design method") is based on the assumption that a plurality of prefabricated houses having different specifications in advance are prepared. For the beams, footings or slabs and walls to be constituted, in the case of beams, the cross-sectional shape consisting of the width and width and the amount of reinforcing bars consisting of the diameter and pitch of the reinforcing bars arranged in the cross-sectional shape are set and the upper structure is set. Set whether the relationship with the anchor rebar connecting the body is an eccentric beam or a concentric beam, in the case of footing or slab and wall, the cross-sectional shape consisting of the thickness and the rebar arranged in the cross-sectional shape Set the amount of reinforcement that consists of the diameter and pitch of

The cross-sectional shape of the beam set as described above,
The amount of reinforcement, and the cross-sectional shape of the footing or slab and wall,
Although the amount of reinforcement differs for each prefabricated house having different specifications, at the stage of setting these in advance, the workability is not impaired for each cross-sectional shape of the beam, footing, slab, and wall, and the cover thickness is reduced. It is possible to set an appropriate amount of reinforcement, and further, it is possible to set an amount of reinforcement that can properly store the connection of the reinforcing steel at the intersection between the beam and the footing or the slab and the wall.

As described above, the variables of the beam are:
Width, rebar diameter, pitch, eccentric beam, concentric beam, and by combining these, a plurality of beams can be configured. Similarly, footing, slab, and wall variables are thickness,
Rebar diameter and pitch, and by combining these,
Multiple footings, slabs, and walls can be configured. Therefore, beams and footings by the above combination,
The allowable shear force and allowable bending moment can be calculated for each slab and wall.

When designing the basic structure of the objective prefabricated house, the structural calculation of the objective prefabricated house is performed to calculate the stress of each part, and the allowable shear force and / or the allowable bending moment satisfying the calculated stress. By selecting the beams, footings or slabs and walls that can exhibit the above, and combining the selected beams, footings or slabs and walls, it is possible to design an optimal foundation structure for the intended prefabricated house. Therefore, even if the prefabricated house is designed by different designers, based on the unified design concept,
A reasonable foundation structure can be easily designed.

In addition, the drawing set for the design of the prefabricated house foundation / basement integrated structure sets prefabricated houses having different specifications, and the beams constituting the foundation / basement integrated structure for each set prefabricated house. , Set a plurality of cross-sectional shapes with different widths, and set a plurality of reinforcing bars and eccentric beams or concentric beams with different rebar diameters and pitches, and set the cross-sectional shape, reinforcing bars, eccentric beams, and concentric beams. A beam cross-sectional view selected from the selected beams and a beam numerical table that integrally describes the cross-sectional dimensions, rebar specifications, allowable shearing force, and allowable bending moment for each beam for which different cross-sectional shapes and reinforcements are set For the footing or slab and wall constituting the foundation structure for each of the set prefabricated houses, a plurality of cross-sectional shapes having different thicknesses are set, and a plurality of reinforcing bars having different rebar diameters and pitches are set, and Cross-sectional shape A footing or slab and wall cross section selected from among reinforcement amount is set footings or slabs and walls, different cross-sectional shapes, the footing or slab and cross-sectional dimensions for each wall is configured reinforcement amount, rebar specifications,
A footing or slab that integrally describes the allowable bending moment and a wall numerical value table.

In the drawing set (hereinafter referred to as "integrated basic drawing set") for designing the prefabricated house foundation / underground integrated structure (hereinafter referred to as "integrated foundation"), a plurality of prefabricated houses having different specifications in advance are assumed. Then, for a beam forming an integral foundation for each prefabricated house, a cross-sectional shape consisting of a width and a width and a reinforcement amount consisting of a diameter and a pitch of a reinforcing bar arranged in the cross-sectional shape are set, and a superstructure is set. By setting whether the relationship with the anchor rebar connecting the body is eccentric beam or concentric beam, it has a cross-sectional shape and reinforcement amount corresponding to the integrated foundation of the prefabricated house with different specifications, and A plurality of beams set as eccentric beams or concentric beams can be set.

Since the beam has a variable shape, width, rebar diameter, and pitch, a beam having a cross-sectional shape and the amount of reinforcement selected from these variables is created as a beam cross-sectional view. Further, for example, it is possible to set a cross-sectional shape using a constant as a criterion and a variable as a width, and create a plurality of representative beam cross-sectional views showing the amount of reinforcement.

Also, because the beams having different widths and the reinforcing bars for the respective beams are set, the allowable shearing force and the allowable bending moment of each beam can be calculated. Therefore, it is possible to create a beam numerical table in which the set values of the cross-sectional dimension consisting of the width, the reinforcing bar specifications, the allowable shear force and the allowable bending moment are integrally described for each set beam.

By arranging the beam sectional view and the beam numerical table prepared as described above side by side, when designing the integrated foundation of the intended prefabricated house, the structural calculation of the prefabricated house is performed and the beam is calculated. When the stress is calculated, an allowable shear force and an allowable bending moment that satisfy the calculated stress are selected from the above-mentioned beam numerical table, whereby the beam cross-sectional shape and the amount of reinforcement can be designed.

For the footing or slab and wall constituting the integral foundation, a cross-sectional shape consisting of a thickness and a reinforcing bar diameter and a reinforcement amount consisting of a pitch arranged in the cross-sectional shape are set as in the case of the beam. By doing so, it is possible to set a plurality of footings or slabs and walls having a cross-sectional shape and a reinforcement amount corresponding to the basic structure of the prefabricated house having different specifications.

Since the thickness, rebar diameter and pitch of the footing, slab, and wall are variables, respectively, a cross-sectional view of the footing, slab, and wall having the cross-sectional shape and the amount of reinforcement selected from these is prepared. To create footing, slab, and wall cross-sectional views (hereinafter referred to as “slab cross-sectional views”).

Further, by setting the footing, slab, and wall having different thicknesses and the amount of reinforcement for each footing, slab, and wall, the allowable bending moment of each slab, slab, and wall is calculated. Can be done.
Therefore, a footing, slab, and wall numerical table (hereinafter referred to as a “slab numerical table”) that integrally describes the set footing, slab, and section dimensions consisting of the thickness for each wall, reinforcing bar specifications, and values of allowable bending moments. Can be created.

By arranging the slab sectional view and the slab numerical table prepared as described above side by side, when designing the integrated foundation of the objective prefabricated house, the structural calculation of the prefabricated house is performed and the footing, When the stress of the slab and the wall is calculated, the allowable bending moment that satisfies the calculated stress is selected from the slab numerical table, so that the footing,
It is possible to design the cross-sectional shape of the slab and wall and the amount of reinforcement.

Accordingly, by describing the beam sectional view, beam numerical table, slab sectional view, and slab numerical table in a single drawing, structural calculations are performed in designing the integrated foundation of the intended prefabricated house. After calculating the stress for each part, select and combine beams and footings, slabs, and walls that can exhibit the allowable shear force and / or allowable bending moment that satisfy the numerical values calculated with reference to the above set of basic drawings. , It is possible to design an integrated foundation for the purpose.

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION The method for designing a foundation structure of a prefabricated house according to the present invention has different sectional shapes and reinforcements for beams, footings and slabs corresponding to prefabricated houses having different specifications in advance. In addition to setting a plurality of patterns and calculating the allowable shear force and allowable bending moment or allowable bending moment for each pattern, when designing the actual foundation structure, the structural calculation of the prefabricated house is performed and Calculate stress and select a pattern with allowable shear force and / or allowable bending moment that satisfies the calculation result, and the basic structure consisting of a combination of beam and footing or slab with necessary cross-sectional shape and reinforcement Is designed.

The method of designing an integrated foundation according to the present invention is a method of designing an underground structure in which a foundation is integrated with a basement, an underground garage, and the like. Multiple patterns are set for beams, footings, slabs, and walls with different cross-sectional shapes and reinforcements in accordance with prefabricated houses with specifications, and the allowable shear force and allowable bending moment for each pattern are set. Is calculated, and when designing the actual foundation structure,
By calculating the stress of each part by performing the structural calculation of the target prefabricated house and selecting the pattern with the allowable shear force and allowable bending moment that satisfies the calculation result, the required cross-sectional shape and the amount of reinforcement were obtained. It is to design a one-piece foundation consisting of a combination of beams and footings or slabs and walls.

The basic structure is the same as the above-mentioned basic structure design method and the integral foundation design method. In the case of the basic structure, the basement is not included because there is no wall of the basement.
The difference is that in the case of a monolithic foundation, there is a wall of the basement to contain the basement. Therefore, a method of designing an integrated foundation will be described below as a representative.

First, the structure of the integrated foundation A will be described with reference to FIGS. In the figure, an integrated foundation A is an integrated base structure B of a prefabricated house and an underground structure such as a basement C (see FIG. 1) or an underground garage D (see FIGS. 2 (a) and 2 (b)). It is. Therefore, the integrated foundation A is composed of the beam 1 and
The footing 2 or the pressure-resistant slab 3 a, the ceiling slab 3 b, and the wall 4 are provided.

FIG. 1 shows an integrated foundation A in which a basement C having a dry area E and a base structure B are integrated, and acts on the pressure slab 3a in the dry area E and the pressure slab 3a in the basement C. The applied loads differ in magnitude. FIG. 2 shows an integrated foundation A in which an underground garage D having an opening F on one side and a foundation structure B are integrated.
The load acts on the pressure-resistant slab 3a substantially uniformly.

First, a method of designing the beam 1 on the integrated foundation A will be described. In the case of an underground structure such as an underground room C or an underground garage D, the beam 1 has a function of directly or indirectly attaching a column constituting a skeleton of a prefabricated house, which is disposed on a foundation structure B formed on a ceiling portion. There is a type which is arranged as a foundation grounded to the ground and has a function of transmitting a vertical load and a horizontal load mainly composed of a load of a prefabricated house to the ground.

The beam 1 has a rectangular cross section or a rectangular cross section consisting of a height (height) and a width (thickness), and a reinforcing bar 5 is arranged in this cross section. The cross-sectional shape of the beam 1 is
Are set in accordance with the amount of bar arrangement. The allowable shearing force and allowable bending moment of the beam 1 are determined according to the cross-sectional shape and dimensions of the beam 1 and the amount of reinforcing bar composed of the diameter and pitch of the reinforcing bar 5 arranged on the beam 1.

In particular, when setting the amount of reinforcement for the beam 1, the work of arranging the rebar 5 is easy, the other beam 1, the footing 2, or the pressure-resistant slab 3 that intersects the target beam 1.
a, that the connection with the reinforcing bars 5 arranged on the ceiling slab 3b and the wall 4 can be made smoothly and reliably, and that the concrete covering thickness of the reinforcing bars 5 arranged on the beam 1 is sufficient. It is necessary to satisfy the conditions.

For example, at a portion where the beam 1 and the wall 4 intersect, the reinforcing bar 5 arranged on the beam 1 and the reinforcing bar 5
Are connected via auxiliary muscles (fixing muscles) 6, but it is necessary to arrange the auxiliary muscles 6 so as to prevent interference with the reinforcing bars 5 arranged on the wall 4. It is important in improving workability. The cover thickness differs depending on the part, but in the case of the beam 1 shown in the figure, the official guidelines (JASS5)
Is set to be 50 mm or more.

For this reason, when the cross-sectional shape of the beam 1 composed of the blade and the width is set, it is possible to set the reinforcing bar amount and the cover thickness that satisfy the above-described conditions for each cross-sectional shape. That is, the sectional shape and the amount of reinforcing bars are set by assuming in advance the thickness and reinforcing bars of the other beams 1 and footing 2 or the pressure-resistant slab 3a, the ceiling slab 3b and the wall 4 which are connected to the target beam 1. It is possible to put.

The beam 1 is not set without any premise, and it is assumed that the superstructure is a prefabricated house. For this reason, it is assumed that a plurality of prefabricated houses having different specifications such as a story (two-story, three-story, etc.), an area, a structure (a frame structure, a wall material, a floor structure, etc.) and the like are provided. Assuming the integrated foundation A, it is possible to design the beam 1 constituting the integrated foundation A of each prefabricated house so as to satisfy the above conditions.

At this time, because of defining the cross-sectional shape of the beam 1, the width, the diameter of the reinforcing bar, which is the amount of reinforcement, and the pitch are variables. For this reason, when the designers are different, a variety of designers can be designed by reflecting the individuality of the designer when setting the cross-sectional shape and the amount of reinforcement. However, the variables are not completely independent of each other, and the amount of reinforcement and the cross-sectional shape have a close relationship with each other. For this reason, by designing by the same designer, it is possible to consolidate the beams 1 constituting the integrated foundation A of the prefabricated house having different specifications into several standard beams 1.

That is, it is possible to standardize a prefabricated house from the beam 1 set for each of the integrated foundations A of a plurality of prefabricated houses having different specifications. It can be represented in a plurality of patterns. Then, for the standardized beam 1, each beam 1
Can be calculated.

In particular, the function of the beam 1 (the beam for mounting the frame of the prefabricated house) constituting the foundation structure B and the beam 1 (the foundation beam) arranged at the boundary between the basement C and the dry area E shown in FIG. Since they are different, the cross-sectional shape and the amount of reinforcement are generally different. However, the design procedure is not different for any of the beams 1, and the beam 1 capable of exerting its respective functions through the above procedure is designed, and the beam 1 is patterned into a plurality of patterns to allow the allowable shear force and It is possible to calculate the allowable bending moment.

As described above, there are cases where the pillars constituting the skeleton of the prefabricated house are attached to the beam 1 corresponding to the foundation structure B. In this case, a plurality of anchor bolts 7 for attaching columns (not shown) to the reinforcing bar 5 of the beam 1 are arranged, and a plurality of (two) vertical reinforcing bars 8 a and a plurality of horizontal reinforcing bars 8 b are provided between the anchor bolts 7. 8 are provided (see FIG. 3).

An anchor bolt 7 corresponding to one pillar,
Generally, the interval between the rising reinforcement bars 8 is standardized by the manufacturer. However, these intervals are not related to the pitch of the reinforcing bar 5 in the beam 1, and have dimensions independent of each other. For this reason, depending on the diameter of the reinforcing bar 5 arranged on the beam 1 and the pitch of the reinforcing bar, the reinforcing bar 5 may interfere with the anchor bolt 7 and the rising reinforcing bar 8.

That is, when the number of the reinforcing bars 5 arranged on the beam 1 is an odd number, as shown in FIG. 3A, the horizontal bars 8b of the rising reinforcing bars 8 are directed outward from the center of the beam 1 or not. As shown in FIG. 2B, by selecting whether the horizontal streaks 8b are directed toward the center of the beam 1, the reinforcing bar 5 and the anchor bolts 7, 7 are provided even when the rising portion 1a of the beam 1 is eccentric or concentric. It is possible to prevent interference with the rising reinforcement 8.

However, when the number of reinforcing bars 5 arranged on the beam 1 is an even number, the rising reinforcing bar 8 is arranged at the center of the beam 1 in order to install the rising a portion 1a of the beam 1 concentrically. Attempting to do so causes a problem of interference with the two rebars 5 arranged in the central portion of the beam 1. Accordingly, by decentering the rising portion 1a of the beam 1, a plurality of vertical streaks 8a constituting the rising portion 1a are arranged on the end side in the width direction of the beam 1 as shown in FIG. The reinforcing bars 5 are installed on both sides of the reinforcing bars 5, thereby making it possible to prevent the reinforcing reinforcing bars 8 from interfering with the reinforcing bars 5. In this way, by making the beam 1 an eccentric beam, regardless of whether the number of the reinforcing bars 5 arranged on the beam 1 is an even number or an odd number, the vertical bars 8a of the rising reinforcing bars 8 are provided.
Can be prevented from interfering with the reinforcing bar 5.

Further, whether the beam 1 is an eccentric beam or a concentric beam as described above depends on the sectional shape of the beam 1, the diameter and pitch of the reinforcing bar 5, the interval between the anchor bolts 7, and the rising reinforcing bar 8. It is possible to select in consideration.

As described above, there are several cross-sectional shapes having different widths and widths, and a reinforcing bar pattern corresponding to each cross-sectional shape and the reinforcing bar diameter and pitch constituting the reinforcing bar pattern are provided. Is set, and an allowable shear force and an allowable bending moment corresponding to each combination are calculated.

Therefore, when the designer designs the beam 1 of the integrated foundation A constituting the intended prefabricated house, the stress acting on the beam 1 is calculated from the result of the structural calculation of the prefabricated house.
Based on this value, the shear force to be held by the target beam and the bending moment to be borne are calculated and compared with the previously calculated allowable shear force and allowable bending moment, and the calculated shear of the target beam 1 is calculated. By selecting a beam 1 that can exhibit an allowable shearing force and an allowable bending moment larger than the values of the force and the bending moment, the beam 1 constituting the integrated foundation A of the intended prefabricated house can be designed.

Therefore, the patterns of the plurality of beams 1 can be charted (beam sectional view, beam numerical value table) and used as a design standard. In addition, it may be confirmed on the drawing that the rebar 5 does not interfere particularly at a complicated intersection.

Next, the footing 2 or the pressure slab 3a,
A method for designing the ceiling slab 3b will be described. The footing 2, the pressure slab 3a, and the ceiling slab 3b each have a cross-sectional shape having a thickness, and the reinforcing bar 5 is arranged along the thickness. Here, since the design method for the footing 2, the pressure slab 3a, and the ceiling slab 3b is substantially the same, the design method of the pressure slab 3a will be described as an example. The design procedure of the pressure-resistant slab 3a is the same as that of the beam 1 described above.
The procedure is performed in substantially the same manner as the above procedure.

The pressure-resistant slab 3a, like the beam 1, is set corresponding to the integrated foundation A of a prefabricated house having different specifications, and the cross-sectional shape and the amount of reinforcing bar composed of the reinforcing bar diameter and the pitch are sufficient. It is possible to guarantee the cover thickness, and the reinforcing bars 5 arranged at the intersections connected to other adjacent portions (beams 1 and walls 4) do not interfere with each other and do not interfere with each other. It is set so that a secure connection can be guaranteed.

The pressure-resistant slab 3a has a function of supporting and transmitting the vertical load and the horizontal load including the loads of the prefabricated house, the basement C and the basement garage D to the ground, and mainly opposes the bending moment. For this reason, the pressure slab 3a is
Individual pressure-resistant slabs 3 constituting an integrated foundation A of a plurality of prefabricated houses having different specifications set when designing the
It is designed corresponding to a.

That is, the cross-sectional shape of the pressure-resistant slab 3a is set according to the amount of reinforcement of the reinforcing bar 5, and the allowable bending moment is determined by the cross-sectional shape and dimensions of the pressure-resistant slab 3a and the reinforcing bar. It is determined according to the amount of reinforcing bar composed of the diameter of the reinforcing bar 5 and the pitch. When setting the amount of reinforcing bars, the work of arranging the reinforcing bars 5 is easy, and the reinforcing bars 5 arranged on the other beams 1 and the walls 4 crossing the target pressure-resistant slab 3a.
It is necessary to satisfy conditions such as smooth and reliable connection with the steel bar and a sufficient covering depth of the concrete with respect to the reinforcing bars 5 arranged.

For this reason, when the cross-sectional shape of the pressure-resistant slab 3a having a thickness is set, it is possible to set the reinforcing bar amount and the cover thickness that satisfy the above-described conditions for each cross-sectional shape. That is, the cross-sectional shape and the amount of reinforcing bars are set by assuming in advance the thickness and the amount of reinforcing bars of the other beams 1 and walls 4 connected to the target pressure-resistant slab 3a.

Since the upper structure of the pressure-resistant slab 3a is a prefabricated house, the specifications represented by the hierarchy (two-story, three-story, etc.), area, structure (frame structure, wall material, floor structure, etc.) are different. Assuming a plurality of prefabricated houses and an integrated foundation A of these prefabricated houses, the pressure-resistant slab 3a constituting the integrated foundation A of each prefabricated house is designed to satisfy the above conditions.

At this time, the thickness defining the cross-sectional shape of the pressure-resistant slab 3a, the diameter of the reinforcing bar, which is the amount of reinforcement, and the pitch are variables, respectively, but the variables are not completely independent of each other.
Since the amount of reinforcement and the cross-sectional shape have a close relationship with each other, by designing by the same designer, the pressure-resistant slab 3a constituting the integrated foundation A of the prefabricated house having different specifications
To some standard ones.

That is, the pressure-resistant slab 3 set corresponding to each integrated foundation A of a plurality of prefabricated houses having different specifications.
From a, standardization on the premise of a prefabricated house can be performed, and the standardized pressure-resistant slab 3a can be represented in a plurality of patterns. Then, for the standardized pressure slab 3a, it is possible to calculate the allowable bending moment of each pressure slab 3a.

Therefore, when the designer designs the pressure-resistant slab 3a of the integrated foundation A constituting the intended prefabricated house, the stress acting on the pressure-resistant slab 3a is calculated from the result of the structural calculation of the prefabricated house, and this value is calculated. Based on the calculated bending moment to be borne by the target pressure slab, the calculated bending moment is compared with the previously calculated allowable bending moment, and the allowable bending moment larger than the calculated bending moment of the target pressure slab 3a is exhibited. By selecting a possible pressure slab 3a, it becomes possible to design the pressure slab 3a constituting the integrated foundation A of the intended prefabricated house.

Since a vertical load typified by the load of the prefabricated house is applied to the pressure-resistant slab 3a disposed in the basement C and the basement garage D, the slab 3a functions as a footing for transmitting the load to the ground. Generally, the amount of bar arrangement is different.

Also, the ceiling slab 3b does not differ in the design procedure, and it is possible to design the ceiling slab 3b capable of exhibiting each function through the above procedure.

Therefore, the patterns of the plurality of slabs 3 including the pressure-resistant slab 3a and the ceiling slab 3b are charted (slab cross section, slab numerical table), and can be used as a design standard.

Next, a method of designing the wall 4 will be described.
The wall 4 has a cross-sectional shape having a thickness, and a reinforcing bar 5 is arranged along the thickness. In particular, the procedure for designing the wall 4 proceeds in substantially the same procedure as the procedure for the beam 1 and the slab 3 described above.

The wall 4 is set corresponding to the integrated foundation A of a prefabricated house having different specifications, similarly to the beam 1.
The cross-sectional shape, the reinforcing bar diameter and the amount of reinforcing bar consisting of the pitch can ensure a sufficient cover thickness, and the reinforcing bars are arranged at the intersections connected with other adjacent portions (beams 1 and slabs 3). The rebars 5 are set so as to ensure smooth connection without interfering with each other.

The wall 4 has a function of supporting the horizontal load acting on the prefabricated house and transmitting it to the ground, and a function of supporting the earth pressure due to the surrounding soil, and mainly opposes the bending moment due to the force. For this reason, the walls 4 are designed corresponding to the individual walls 4 constituting the integrated foundation A of a plurality of prefabricated houses having different specifications set when designing the beam 1.

That is, the cross-sectional shape of the wall 4 is set in accordance with the amount of reinforcement of the reinforcing bar 5, and the allowable bending moment is a reinforcing bar consisting of the cross-sectional shape and dimensions, the diameter and the pitch of the reinforcing bar 5. Determined according to the quantity. When setting the amount of reinforcement, the work of arranging the reinforcement 5 is easy,
That the connection with the reinforcing bars 5 arranged on the other beams 1 and the slabs 3 intersecting with each other can be made smoothly and reliably, and that the covering thickness of the concrete on the reinforcing bars 5 arranged is sufficient.
It is necessary to satisfy the conditions such as:

For this reason, when the cross-sectional shape of the wall 4 having the thickness is set, it is possible to set the reinforcing bar amount and the cover thickness satisfying the above-described conditions for each cross-sectional shape. That is, the cross-sectional shape and the amount of reinforcement are set by assuming in advance the thickness and the amount of reinforcement of other beams 1 and slabs 3 connected to the target wall 4.

Since the upper structure of the wall 4 is a prefabricated house, a plurality of specifications having different specifications such as a hierarchy (two-story, three-story, etc.), area, structure (frame structure, wall material, floor structure, etc.) are used. And the integrated foundation A of these prefabricated houses is assumed, and the walls 4 constituting the integrated foundation A of the individual prefabricated houses are designed to satisfy the above conditions.

At this time, the thickness that defines the cross-sectional shape of the wall 4, the diameter of the reinforcing bar, which is the amount of reinforcement, and the pitch are variables, respectively.
The above variables are not completely independent of each other, and since the reinforcement arrangement and the cross-sectional shape are closely related to each other, they are designed by the same designer to form the integrated foundation A of the prefabricated house with different specifications. It is possible to consolidate the walls 4 to be made into several standard ones.

In particular, when the integral foundation A is the basement C shown in FIG. 1, the wall 4 is generally designed as a wall type structure, and when the integral foundation A is the underground garage D shown in FIG. Generally, it is designed as a box culvert structure. For this reason, the load borne by the wall 4 is different between the basement C and the basement garage D, and the thickness and the amount of reinforcement are changed accordingly. However, the design for each wall 4 can proceed according to the above procedure.

That is, it is possible to standardize on the premise of a prefabricated house from the wall 4 set corresponding to the integrated foundation A of a plurality of prefabricated houses having different specifications. It can be represented in a plurality of patterns. Then, for the standardized wall 4, individual walls 4
Can be calculated.

Therefore, when the designer designs the wall 4 of the integrated foundation A constituting the intended prefabricated house, the stress acting on the wall 4 is calculated from the result of the structural calculation of the prefabricated house.
Based on this value, the bending moment to be borne by the target slab is calculated and compared with the previously calculated allowable bending moment, and an allowable bending moment larger than the calculated value of the bending moment of the target wall 4 is calculated. Wall 4 that can be demonstrated
By selecting, it becomes possible to design the wall 4 constituting the integrated foundation A of the intended prefabricated house.

Therefore, if the patterns of the plurality of walls 4 are charted, they can be used as design standards.

As described above, the beams 1, footings 2 or slabs 3, and the walls 4, which constitute the integrated foundation A of a plurality of prefabricated houses having different specifications in advance, are arranged in accordance with the cross-sectional shapes and the respective cross-sectional shapes. Several patterns consisting of muscle mass are set to calculate the allowable shear force and / or allowable bending moment for each pattern, and when actually designing the integrated foundation A of the prefabricated house, the structural calculation From the results, the stress acting on the beam 1, footing 2, slab 3, and wall 4 constituting the integrated foundation A is calculated. From the calculated stress, in the case of the beam 1, a pattern satisfying the allowable shear force and the allowable bending moment. In the case of the footing 2, the slab 3, and the wall 4, a pattern that satisfies the allowable bending moment is selected, and by combining the selected patterns, the integral foundation A can be designed. That.

The integrated foundation A designed as described above is
It is not optimal for the desired foundation of a prefabricated house, but can exhibit somewhat excessive performance. But,
Considering the time and effort required to carry out the optimal design for the desired prefabricated house integrated foundation, even if the performance is somewhat excessive, it is advantageous in terms of cost.

When designing a mere foundation structure other than the integrated foundation A in which the foundation structure and the basement or underground garage are integrated, that is, when executing the foundation design method according to the present invention,
As long as the target foundation structure is composed of beams and footings or slabs, it is possible to design through the same procedure as the above-described design procedure except for the design for the wall 4.

Next, the configuration of the integrated basic drawing set according to the present invention will be described with reference to FIGS. FIG. 4 is an integrated basic drawing set 10a for an integrated basic A constituted by a basic structure B, a basement C, and a dry area E, and corresponds to FIG. Fig. 5 shows the basic structure B
FIG. 2 is an integrated basic drawing set 10b for the integrated foundation A constituted by the vehicle and the underground garage D, and corresponds to FIG.

As shown in the figure, each integrated basic drawing set 10
10a and 10b disclose portions constituting a wall-type basement as an integrated foundation A. Each portion has a beam sectional view, a slab sectional view, a reinforcement amount for each sectional view, a sectional shape, and the like. A beam numerical table and a slab numerical table, each of which includes an allowable bending moment and / or an allowable shear force corresponding to a combination of a reinforcing bar position and an amount of reinforcing bar uniquely set based on a sectional shape and a specified cover thickness, are described.

That is, the underground wall list 11 is described in the upper left part of each of the integrated basic drawing sets 10a and 10b, and the first floor slab list 12 and the pressure resistant slab list 13 are described in the lower left part. In the upper right part, the first floor beam list 14 is described, and in the lower right part, the basic beam list 15 is described in the integrated basic drawing set 10a for the basement C,
Nothing is described in the integrated basic drawing set 10b for the underground garage D.

The basement wall list 11 is a portion for describing the pattern of the wall 4 constituting the basement room C and the basement garage D. An example of the cross-sectional shape of the wall 4 and an example of the arrangement of the bars including the diameter and the pitch of the horizontal streak are illustrated. Section 11a indicating that the displayed item is the allowable bending moment, and different vertical streaks arranged on the wall 4 having the horizontal streaks whose diameter and pitch are set in advance as described above. A vertical streak column 11c in which a plurality of bar arrangement patterns each having a diameter and a pitch are described, and a bending moment display column 11d for displaying a value of an allowable bending moment in each of the bar arrangement patterns described in the vertical streak column 11c. It is constituted by.

For example, in the example of the integrated basic drawing set 10a corresponding to the basement C, when the thickness is 220 mm, the horizontal streak diameter is 13 mm, and the pitch is 200 mm, the vertical streak having a diameter of 13 mm is pitched. On the wall 4 with 100mm reinforcement, 1
It has an allowable bending moment of 3.63 t · m (ton-meter) per m. Further, in the example of the integrated basic drawing set 10b corresponding to the underground garage D, three types of drawings having different thicknesses are described in the drawing portion 11b, and a sub-bar having a diameter of 13 mm is arranged at each section at a pitch of 200 mm. Is described.

The first-floor slab list 12 is a portion for describing a pattern of the slab 3 disposed on the foundation structure B in the integrated foundation A, and describes an example of a cross-sectional shape of the slab 3 and a diameter and a pitch of a secondary bar. Drawing section 12a, item display column 12b indicating that the displayed item is the allowable bending moment, and main bar direction column in which a plurality of bar arrangement patterns each including the diameter and pitch of the main bar are described.
12c and a bending moment display field 12d in which the value of the allowable bending moment is described.

For example, in the example of the integrated basic drawing set 10a, the drawing portion 12b displays one kind of cross-sectional shape and the fact that the auxiliary muscle direction is the same as the main muscle direction, and the main muscle direction column is displayed.
A plurality of patterns composed of vertical stripes and pitches having different diameters are described in 12c, and an allowable bending moment corresponding to each pattern is described in a bending moment display column 12d. However, in the example of the integrated basic drawing set 10b, the drawing unit
12b describes three kinds of cross-sectional shapes, diameters and pitches of accessory bars, a plurality of patterns consisting of vertical bars and pitches having different diameters are described in the main bar direction column 12c, and a bending moment display column 12d. The allowable bending moment corresponding to each pattern is described.

The pressure-resistant slab list 13 is a portion for describing the pattern of the slab 3 (pressure-resistant slab, footing 2) arranged on the ground side of the integrated foundation A, and shows an example of the cross-sectional shape of the slab 3 and the diameter of the auxiliary bar. And a drawing part 13a describing the pitch and
An item display column 13b indicating that the display item is an allowable bending moment, a main reinforcing bar direction column 13c in which a plurality of rebar arrangement patterns composed of main bar diameters and pitches are described, and a bending moment display column in which a value of the allowable bending moment is described. 13d.

The functions of each section or display column constituting the pressure-resistant slab list 13 are the same as those of the above-described first-floor slab list 12, and the description contents are different. For example, an integrated basic drawing set
In the example of 10a, the drawing part 13b displays one kind of cross-sectional shape and the fact that the accessory muscle direction is the same as the main muscle direction,
A plurality of patterns composed of vertical stripes and pitches having different diameters are described in the main bar direction column 13c, and an allowable bending moment corresponding to each pattern is described in the bending moment display column 13d. In the example of the integrated basic drawing set 10b,
The drawing section 13b describes three types of cross-sectional shapes, the diameters and pitches of the auxiliary bars, and the main bar direction column 13c describes a plurality of patterns composed of vertical bars and pitches having different diameters. Describes allowable bending moments corresponding to the respective patterns.

The first floor beam list 14 is a portion for describing the pattern of the beam 1 constituting the foundation structure B in the integrated foundation A, and is an example of a plurality of cross-sectional shapes having eccentric rising portions and different thicknesses. The drawing section 14a in which the example of the bar arrangement including the number of abdominal muscles is drawn and described in correspondence with the respective cross-sectional shapes, the beam display field 14b corresponding to different reasons, and the display item is the allowable bending moment. An item display column 14c, a main bar column 14d in which a plurality of bar arrangement patterns each including a diameter and a number of steps of different main bars arranged on the beam 1 having abdominal muscles whose diameter and number are set in advance, and a main bar column A bending moment display section 14e for displaying the value of the allowable bending moment in each of the reinforcement arrangement patterns described in 14d, an item display end 14f indicating that the displayed item is the allowable shear force, and a pitch of the main reinforcement are displayed. Main bar pitch column 14g and main bar A shear force display column 14h displaying the value of the permissible shear force according to the pitch, is constituted by.

For example, in the example of the integrated basic drawing set 10a, four types of beams having different thicknesses are described in the drawing portion 14a, and eccentric rising portions are described for each of the beams. The arrangement and number of bars are described. In particular, in the case where the main reinforcing bar having a beam thickness of 300 mm, a width of 500 mm and a diameter of 16 mm is arranged in two steps, 8.27 t · m per meter.
It states that a bending moment of m can be tolerated, and that if the pitch of the main reinforcement is 200 mm, it can withstand a shear force of 8.71 t. Further, in the example of the integrated basic drawing set 10b, the contents substantially the same as the contents of the integrated basic drawing set 10a are described.

The foundation beam list 15 is a portion for describing the pattern of the beam 1 arranged at the grounding portion in the integrated foundation A,
Only the integrated basic drawing set 10a corresponding to the basement C is targeted. The contents of the foundation beam list 15 are the same as the contents of the first floor beam list 14 described above.

That is, the foundation beam list 15 includes a drawing section 15a which describes an example of a plurality of cross-sectional shapes having different thicknesses and an example of a bar arrangement including the number of abdominal muscles corresponding to each cross-sectional shape.
Beam display column 15b corresponding to the fault, item display column 15c indicating that the display item is the allowable bending moment, and different main reinforcements arranged on the beam 1 having the abdominal muscle whose diameter and number are set in advance. A main reinforcement column 15d in which a plurality of reinforcement patterns each including a diameter and the number of steps are described; a bending moment display column 15e for displaying a value of an allowable bending moment in each reinforcement arrangement pattern described in the main reinforcement column 15d; Is a permissible shear force, an item display end 15f, a main bar pitch column 15g for displaying a main bar pitch, and a shear force display column 15h for displaying an allowable shear force value corresponding to the main bar pitch. ing.

An integrated basic drawing set configured as described above
In 10a and 10b, it is selectively used depending on whether the underground structure of the integrated foundation A in the target prefabricated house is the basement room C or the underground garage D. For example, when the integrated foundation A of the intended prefabricated house has a basement C,
When the integrated basic drawing set 10a is selected in advance and the integrated foundation A has the underground garage D, it can be used by selecting the integrated basic drawing set 10b in advance.

Then, the structural calculation of the intended prefabricated house is performed to calculate the stress acting on the beam 1, the footing 2, or the slab 3, and the wall 4, that is, the shearing force and the bending moment. For example, when the shearing force acting on the beam 1 constituting the foundation structure B is 6.5 t and the bending moment is 7.5 t · m / m, the beam satisfying these values is 450 mm in thickness and thickness. The beam 1 can be designed by selecting a pattern in which main bars having a diameter of 250 mm and a diameter of 19 mm are arranged in two steps.

That is, the allowable shear force of the selected beam 1 is 6.
87t, and the allowable bending moment is 8.27t · m /
m. Therefore, it is possible to sufficiently satisfy the values of the above-mentioned shearing force and bending moment.

Similarly, the shear force and bending moment acting on the beam 1 contacting the ground are calculated, and the allowable shear force that satisfies the calculated values from the basic beam list 15 in the integrated basic drawing set 10a is calculated. By selecting the cross-sectional shape and the amount of reinforcement of the beam that can exhibit the allowable bending moment, it is possible to design the beam 1 constituting the integrated foundation A of the intended prefabricated house.

In the same manner, the wall 4 and the first floor slab 3,
The bending moment acting on the pressure-resistant slab 3 is calculated, and the allowable bending moment that satisfies the respective values already calculated from the basement wall list 11, the first-floor slab list 12, and the pressure-resistant slab list 13 in the integrated basic drawing set 10a. Design the walls 4, slabs 3, and pressure-resistant slabs 3 (footing 2) that constitute the integrated foundation A of the target prefabricated house by selecting the cross-sectional shape and the amount of reinforcement of the walls, slabs, and pressure-resistant slabs that can exhibit the performance It is possible.

Therefore, the integrated foundation A of the prefabricated house can be designed very easily. Figure 6 is a set of basic drawings used when designing the basic structure of a prefabricated house
It shows 20 examples.

The underground beam list 21 shown in the figure is a drawing of an example of a plurality of cross-sectional shapes having different thicknesses and differences with respect to the foundation beam, and an example of a bar arrangement including the number of abdominal muscles corresponding to each cross-sectional shape. The drawing part 21a described above, an item display field 21b indicating that the display item is the allowable bending moment, and the diameter and the number of steps of the different main reinforcing bars arranged on the foundation beam having the abdominal muscles whose diameter and number are set in advance. A main bar column 21c in which the bar arrangement pattern is described, and a bending moment display column 21 for displaying a value of an allowable bending moment in each of the bar arrangement patterns described in the main bar column 21c.
d, an item display end 21e indicating that the display item is the allowable shear force, and a shear force display field 21f displaying the value of the allowable shear force.
And is constituted by.

The basic drawing set 21 configured as described above can be advantageously used when designing a basic structure in a target prefabricated house. That is, the structural calculation of the target prefabricated house is performed, the stress acting on the foundation beam, that is, the shearing force and the bending moment are calculated, and the foundation beam satisfying the calculated values is selected, and the foundation of the target prefabricated house is selected. It is possible to design the foundation beams that make up the structure.

[0110]

As described above in detail, according to the method for designing the foundation structure of a prefabricated house according to the present invention, the beam and footing or slab constituting the foundation structure are previously subjected to beam cross-sectional shapes and footing or slab cross-sections. In addition to setting the shape, set the reinforcement amount consisting of the rebar diameter and pitch,
Allowable shear force for each beam and each footing or slab, and
Or calculate the allowable bending moment, and when designing the foundation structure of the objective prefabricated house, select the beam and footing or slab that have the allowable shear force and / or the allowable bending moment that satisfies the stress of each part calculated as a result of the structural calculation. By selecting and combining from each beam and each footing or slab for which the amount of reinforcement has been set and the allowable shear force and / or allowable bending moment has been calculated, an optimal foundation structure for the intended prefabricated house is designed. I can do it. Therefore,
Even when the prefabricated house is designed by different designers, a reasonable basic structure can be easily designed based on the unified design concept.

The basic drawing set includes a plurality of cross-sectional shapes having different widths and different reinforcing bars diameters and pitches for beams constituting a basic structure of a prefabricated house having different specifications. Is set, the beam cross-section selected from the set beams, and the cross-sectional dimensions, rebar specifications,
A beam numerical table that integrally describes the permissible shear force and permissible bending moment, and a plurality of cross-sectional shapes with different thicknesses are set for footing or slabs that constitute the foundation structure of each prefabricated house. A plurality of different bar arrangement amounts are set, and a footing or slab cross-sectional view selected from the set footing or slab, and a cross-sectional dimension, reinforcing bar specification, Since it is configured with a footing or slab numerical table that integrally describes the allowable bending moment, when designing the foundation structure of the target prefabricated house, the structural stress of the prefabricated house is calculated to calculate the stress of the beam. Then, by selecting the allowable shear force and allowable bending moment that satisfy the calculated stress from the above beam numerical table, the beam cross-sectional shape and the amount of reinforcement are designed. It can be.

Further, for the footing or slab constituting the basic structure, similarly to the case of the beam, the cross-sectional shape consisting of the thickness, the diameter of the reinforcing bar arranged in the cross-sectional shape, and the amount of reinforcing bar consisting of the pitch are set. Thus, it is possible to design a plurality of footings or slabs having cross-sectional shapes and reinforcements corresponding to the basic structure of a prefabricated house having different specifications.

Further, in the integrated basic design method according to the present invention,
It is possible to easily design an integrated foundation in which the foundation structure and an underground structure such as a basement or an underground garage are integrated. In particular, the cross-sectional shape and the amount of reinforcement of the beam, and the cross-sectional shape and the amount of reinforcement of the footing or slab and the wall do not impair workability, and the amount of reinforcement can be set appropriately.

In particular, the intersection between the parts (eg, a beam to a beam, a beam to a slab, and the like) at which the reinforcement of the rebar in the foundation structure becomes the strictest is basically an intersection in two dimensions. , The basement and the underground garage are integrated,
In addition, because of the addition of vertical walls, intersections in three dimensions can be made more stringent. However, by implementing the integrated foundation design method of the present invention, it is advantageous because the connection of the reinforcing steel at the intersection between the beam and the footing or the slab and the wall can be favorably contained.

Further, when designing the basic structure of the objective prefabricated house, the structural calculation of the objective prefabricated house is performed to calculate the stress of each part, and the allowable shear force and / or the allowable stress that satisfies the calculated stress. By selecting beams, footings or slabs and walls capable of exerting a bending moment, and combining the selected beams, footings or slabs and walls, it is possible to design an optimal foundation structure for the intended prefabricated house.

Further, in the integrated basic drawing set according to the present invention, since the beam sectional view, the beam numerical table, the slab sectional view, and the slab numerical table are described, the structural calculation of the objective prefabricated house is performed and each part is calculated. After calculating the stress, the beam and footing, slab, and wall capable of exhibiting the allowable shear force and / or the allowable bending moment satisfying the numerical value calculated with reference to the integrated basic drawing set are selected and combined, You can design an integrated foundation for your purpose.

Further, by executing the design method according to the present invention, interference between the reinforcing bars is eliminated, and a necessary interval between the reinforcing bars can be ensured, so that the concrete wraparound can be improved during construction. As a result, it is possible to cast more dense concrete, and the safety of the structure can be improved. In particular, there has been a case in which, in the past, since concrete was not so likely to wrap around due to the congestion of the reinforcing bars, the concrete had to be divided into parts such as slabs, walls, etc., and concrete had to be poured into each part. By carrying out the design method of the above, it is possible to construct portions such as slabs, walls and the like by one-time concrete casting.
For this reason, the construction labor is reduced, the seams of concrete generated at the time of divisional casting are eliminated, and the concrete itself is integrated to realize a robust underground integrated structure.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of an integrated foundation having a basement.

FIG. 2 is a diagram illustrating a configuration of an integrated foundation having an underground garage.

FIG. 3 is a diagram illustrating a configuration of an eccentric beam in which a rising portion is eccentric.

FIG. 4 is a diagram illustrating an integrated basic drawing set for an integrated foundation having a basement.

FIG. 5 is a diagram illustrating an integrated foundation drawing set for an integrated foundation having an underground garage.

FIG. 6 is a diagram illustrating a basic drawing set.

[Explanation of symbols]

 Reference Signs List A Integrated foundation B Foundation structure C Basement room D Underground garage E Dry area F Opening 1 Beam 1a Elevation 2 Footing 3 Slab 3a Pressure slab 3b Ceiling slab 4 Wall 5 Reinforcing bar 6 Auxiliary bar 7 Anchor bolt 8 Rigid bar 8a Vertical bar 8b Horizontal streaks 10a, 10b Integrated foundation drawing set 11 Basement wall list 12 First floor slab list 13 Pressure slab list 14 First floor beam list 15 Foundation beam list 11a, 12a, 13a Drawing section 11b, 12b, 13c Item display fields 11c, 12c, 13c Vertical streak column 11d, 12d, 13d Bending moment display column 14a, 15a Drawing section 14b, 15b Beam display column 14c, 15c Item display column 14d, 15d Main reinforcement column 14e, 15e Bending moment display column 14f, 15f Item display end 14g , 15g Main reinforcement pitch field 14h, 15h Shear force display field 20 Basic drawing set 21 Underground beam list 21a Drawing section 21b Item display field 21c Main reinforcement field 21d Bending Mento display field 21e item display end 21f shear display column

Claims (4)

[Claims] A plurality of prefabricated houses having different specifications are set in advance, and a beam and a footing or a slab constituting a foundation structure for each of the set prefabricated houses are provided with a cross-sectional shape of a beam including a width and a width. Along with setting the cross-sectional shape of the footing or slab consisting of the thickness, setting the reinforcement amount consisting of the reinforcing bar diameter and the pitch for each of the beams and each footing or slab, and further, each of the beams is an eccentric beam or a concentric beam. ,
Calculate the permissible shear force and / or permissible bending moment for each beam and each footing or slab in which the amount of reinforcement is set, and when designing the basic structure of the target prefabricated house, the result of the structural calculation for each house Beams and footings or slabs having an allowable shear force and / or an allowable bending moment that satisfy the calculated stress of each part are used for each beam for which the amount of reinforcement is set and the allowable shear force and / or the allowable bending moment is calculated. And selecting a footing or slab, and designing the foundation structure by combining the selected beam and footing or slab. 2. Prefabricated houses having different specifications are set, and a plurality of cross-sectional shapes having different widths are set for beams constituting a foundation structure for each of the set prefabricated houses. A plurality of different bar arrangement amounts and eccentric beams or concentric beams are set, and a beam cross-sectional view selected from the beams in which the cross-sectional shape, the reinforcement amount, the eccentric beam, and the concentric beam are set, and a different cross-sectional shape and a reinforcement A beam numerical table that integrally describes the sectional dimensions, rebar specifications, allowable shear force and allowable bending moment for each beam for which the amount is set, and for the footing or slab that constitutes the foundation structure for each prefabricated house set above Setting a plurality of cross-sectional shapes having different thicknesses, setting a plurality of reinforcing bars having different reinforcing bar diameters and pitches, and selecting a footing or a slab selected from the footing or the slab in which the cross-sectional shapes and the reinforcing bars are set. A prefab having a sectional view and a footing or slab numerical table in which sectional dimensions, rebar specifications, and allowable bending moments are integrally described for each footing or slab having a different cross-sectional shape and reinforcement amount. Drawing set for design of basic structure of house. 3. A plurality of prefabricated houses having different specifications are set in advance, and beams and footings or slabs and walls constituting a foundation-basement integrated structure for each of the set prefabricated houses are determined from width and width. In addition to setting the cross-sectional shape of the footing or slab and wall consisting of the cross-sectional shape and thickness of the beam, and setting the reinforcement amount consisting of the rebar diameter and pitch for each of the beams and each footing or slab and wall, The above-mentioned beams are eccentric beams or concentric beams, and the allowable shear force and / or the allowable bending moment are calculated for each beam and each footing or slab and wall for which the amount of reinforcement is set, and the foundation of the objective prefabricated house is calculated.・ In designing the underground integrated structure,
Allowable shear force and / or beam and footing or slab and wall having an allowable bending moment that satisfies the stress of each part calculated as a result of the structural calculation for each house is provided with the amount of reinforcing bars set and the allowable shear force and / or A prefabricated structure which selects from each beam and each footing or slab and wall for which the allowable bending moment has been calculated, and designs the integrated foundation / underground structure by combining the selected beam, footing or slab and wall. How to design an integrated foundation / basement structure for a house. 4. Prefabricated houses having different specifications are set, and a plurality of cross-sectional shapes having different widths are set for beams constituting an integrated foundation / underground structure for each set prefabricated house. A plurality of reinforcing bars and eccentric beams or concentric beams having different diameters and pitches are set, and a beam cross-sectional view selected from among the beams in which the cross-sectional shape, the reinforcing bars, the eccentric beams, and the concentric beams are set, and a different cross-sectional view. A beam numerical table in which the cross-sectional dimensions, rebar specifications, allowable shearing force and allowable bending moment are integrally described for each beam for which the shape and the amount of reinforcement are set, and a footing which constitutes the basic structure for each of the prefabricated houses set above Or, for the slab and the wall, set a plurality of cross-sectional shapes with different thicknesses and set a plurality of reinforcing bars with different rebar diameters and pitches,
Footing or slab and wall cross-sectional view selected from among the footing or slab and wall in which the cross-sectional shape and reinforcement amount are set, and cross-sectional dimensions for each footing or slab and wall in which different cross-sectional shape and reinforcement amount are set And a footing or slab and wall numerical value table in which the rebar specifications and allowable bending moments are integrally described.