JP2020100938A - Frame structure of Yamadome wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform a frame work of a mountain retaining wall. SOLUTION: A raised material 12 horizontally arranged on an inner surface of a mountain retaining wall is formed of a single beam material 14 and a polymerized beam material 15 arranged at both ends thereof, and the single beam material 14 is formed. The cover plate 31 is arranged so as to straddle the outer surface of the end portion of the beam material 15 and the outer surface of the end portion of the laminated beam material 15, and the single beam material 14 and the polymerized beam material 15 are fastened by the cover plate 31. The flint piece 33 is arranged so as to straddle the inner side surface of the end portion of the single beam material 14 and the inner side surface of the end portion of the polymerized beam material 15. 15 is concluded. A flint material 36 is fastened between adjacent flint receiving pieces 33. [Selection diagram] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a frame structure of a mountain retaining wall that has an uprising material and a fired material that is installed between adjacent abutment materials and supports the retaining wall.

In order to prevent the surrounding ground from collapsing from the side surface around the excavated portion when the ground is excavated, a retaining wall is provided on the peripheral side surface. When excavating underground in a plane quadrangle, a mountain retaining wall is arranged on the inner surface of the quadrangular excavation side. In order to hold the mountain retaining wall, inside the mountain retaining wall, the upholstery material as the earth retaining material is arranged horizontally, and is arranged inside the adjacent mountain retaining walls and abutted at right angles. A flint material is installed between the two upholstery materials.

Patent Document 1 describes a frame structure of a mountain retaining wall having an upholstery material and a fired material installed between adjacent upholstery materials.

The upholstery member in the conventional frame structure described in the above-mentioned document is formed by connecting the central unitary beam and the end overlap beams arranged at both ends thereof. The central unitary beam is formed of a single H-shaped steel, and the end overlap beam is formed by connecting the inner beam and the outer beam, each having a width dimension of ½ of the central unitary beam, in the width direction.

The central single beam with a large earth pressure load is formed of high-strength steel, that is, high-tensile steel, and the inner beam and outer beam of the end overlapped beams with a small earth pressure load are each formed of general structural rolled steel, The central single beam has higher strength than the end overlap beam.

JP, 2014-159771, A

The end plates provided at both ends of the central unitary beam and the end plates provided at the ends of the end overlap beam are connected to each other by a plurality of bolts in an abutted state. Further, a cover plate is abutted against the inner side surface and the outer side surface of both ends so as to straddle the central single beam and the end overlap beam, and is fastened by a bolt.

The fire hitting piece is fastened to the end of the central single beam by bolts, and the fire hitting material installed between adjacent bellows is attached between the fire hitting pieces of the adjacent central single beam. ..

In the frame structure in which the central single beam and the end overlap beam are connected by the cover plate attached to the inner side surface and the cover plate attached to the outer side surface as in the conventional art, the space between the adjacent upright members is increased. It is necessary to avoid the cover plate and connect the fired material to be installed on the end of the central single beam. For this reason, it is necessary to abut two cover plates on the inner side surface and the outer side surface of the central single beam, the end composite beam, and the connection portion, and fasten them with bolts. However, there is a problem in that construction work takes time and workability is poor.

An object of the present invention is to improve the workability of erection work for mountain retaining walls and shorten the construction period.

In order to solve the above-mentioned subject, the frame structure of the mountain retaining wall according to the present invention according to claim 1 is provided between the uprising members horizontally arranged on the inner surface of the mountain retaining wall and the adjacent uprising members. A frame structure of a mountain retaining wall with a fired material to be erected, wherein the single beam member is made of shaped steel and a plurality of shaped steel members having a width dimension smaller than that of the single beam member are used. Forming the uprising member with the overlapping beam members arranged at both ends of the beam member, straddling the outer surface of the end portion of the single beam member and the outer surface of the end portion of the overlapping beam member. The single beam member and the overlapped beam member are fastened to each other by a cover plate that is arranged, and the cover member is arranged across the inner side surface of the end portion of the single beam member and the inner side surface of the end portion of the overlapped beam member. The single beam material and the overlapped beam material are fastened together by a fired piece, and the fired material is fastened to the fired piece.

According to the frame structure of the mountain retaining wall of the present invention as set forth in claim 2, in the invention as set forth in claim 1, the single beam member is provided with a stiffener plate located at an end of the struck piece. Is characterized by.

According to a third aspect of the present invention, in the frame structure of the mountain retaining wall according to the first aspect or the second aspect, a jack for applying a pressing force to the hitting piece is provided in the hitting material. ..

According to the present invention, the cover plate is fastened to the outer surface of each end to connect the single beam and the overlapped beam arranged at both ends thereof, and the inner surface of each end is connected. A fire hitting piece is fastened to. A hitting material is attached to the hitting piece. Since the hitting piece for attaching the hitting material is used to fasten the single beam and the overlapped beam, separately from the hitting piece, the end of the single beam and the overlapped beam is separated. It becomes unnecessary to attach a cover plate to the side surface. As a result, it is possible to improve the workability of the erection work for the mountain retaining wall, shorten the construction period, and improve the economical efficiency of the erection work. Since the hitting material is attached to the connection portion between the single beam material and the overlapped beam material via the hitting piece, the strength of the connection portion can be increased by the hitting material.

By placing the stiffener plate on the single beam at the end of the hitting piece, earth pressure will be applied to the fired material from the retaining wall through the stiffener plate, and the strength of the single beam will be increased. be able to. When a jack is provided on the fired material, the pressing force applied to the fired piece can be adjusted, and an optimum holding force can be applied to the fired material according to the earth pressure.

It is a top view showing a frame structure of a mountain retaining wall which is one embodiment of the present invention. (A) is a partially omitted plan view of the single beam member shown in FIG. 1, (B) is a front view of (A), and (C) is a sectional view taken along the line AA in FIG. 2. Yes, (D) is a right side view of (A). It is a top view which shows the overlapped beam material connected to the end surface of a single beam material. It is a perspective view which shows the edge part of a single beam material, and the edge part of an overlapping beam material. It is a perspective view which shows the connection part of a single beam material and an overlapping beam material. It is a B section enlarged plan view in FIG. It is a partially abbreviated top view which shows the frame structure of the mountain retaining wall which is other embodiment. It is a partially omitted top view which shows the frame structure of the mountain retaining wall which is another embodiment. It is a partially omitted top view which shows the frame structure of the mountain retaining wall which is another embodiment.

Hereinafter, an embodiment as an example of the present invention will be described in detail with reference to the drawings. In addition, in the drawings for describing the embodiments, the same components are denoted by the same reference symbols in principle, and repeated description thereof will be omitted.

(First embodiment)

In FIG. 1, a rectangular excavation portion 10 is excavated underground, and mountain retaining walls 11a to 11d are arranged on the side surfaces around the excavation portion 10. Each mountain retaining wall 11a-11d is formed of a large number of steel sheet piles, each steel sheet pile is vertically driven along the peripheral side surface, and adjacent steel sheet piles are connected by the side surface. However, the retaining wall can be formed not only by the steel sheet pile but also by other members.

The upholstery material 12 is horizontally arranged on the inner surfaces of the mountain retaining walls 11a and 11b, and both end surfaces of the uprising material 12 are in contact with the mountain retaining walls 11c and 11d. The upholstery material 13 is horizontally arranged on the inner surfaces of the mountain retaining walls 11c and 11d, and both end surfaces of the upholstery material 13 are in contact with the ends of the upholstery material 12. In this way, the four uprising members 12 and 13 are arranged on the inner surface side of the mountain retaining walls 11a to 11d in the same plane.

Each of the uprising members 12, 13 is composed of a single beam member 14 and overlapping beam members 15 arranged at both ends thereof. The single beam member 14 is made of H-shaped steel material of high strength steel, that is, high-strength steel, and is composed of a single H-shaped steel material having a width dimension H and a height dimension B as shown in FIG. It has 14a and the flange 14b integrated with this. The H-shaped steel material is, for example, a material of SM490Y (rolled steel material for welded structure) having a higher yield point than that of ordinary SS400 (rolled steel material for general structure), and a large size such as H700×350×16×36. H-shaped steel material is used. As a result, the strength equivalent to two Yamadome H500 types can be obtained. End plates 16 are welded to both end faces of the single beam member 14, and a plurality of bolt mounting holes 17 are formed in the end plate 16.

Triangular rib plates 18 are welded to both sides of the web 14a, and each rib plate 18 is welded to the end plate 16. The rib plates 18 enhance the attachment strength between the end plate 16 and the single beam member 14. ing. Further, quadrilateral stiffener plates 19 are welded to both sides of the web 14a while being positioned at both end sides of the single beam member 14, and each stiffener plate 19 is welded to the flange 14b. The edge strength of 14 is increased.

FIG. 3 is a plan view showing the overlapped beam member 15 connected to the end surface of the single beam member 14. The overlapped beam member 15 is formed by connecting a long overlapped first overlapped beam member portion 21a and a short overlapped second overlapped beam member portion 21b. Each of the overlapped beam members 21a and 21b is formed by connecting the outer beam member 22 and the inner beam member 23. The outer beam member 22 and the inner beam member 23 have a web 15a and a flange 15b which is integral with the web 15a, each of which is made of an H-shaped steel member of rolled steel for general structure and has a lower strength than the single beam member 14. It is a steel material.

The width dimension h of the outer beam member 22 and the inner beam member 23 is half the width dimension H of the single beam member 14, and the height dimension is the same as the height dimension B of the single beam member 14. Therefore, the width dimension of the overlapped beam member 15 is the same as the width dimension of the single beam member 14. The overlapped beam member 15 is formed by connecting a plurality of beam members in the width direction, but the overlapped beam member 15 may be formed by connecting beam members made of three H-shaped steel members. ..

End plates 24 are welded to both end faces of the overlapped beam member portion 21a, and end plates 24 are similarly welded to both end faces of the overlapped beam member portion 21b. Triangular rib plates 25 are welded to both sides of the web 15a, and each rib plate 25 is welded to the end plate 24. The rib plate 25 increases the joint strength between the end plate 24 and the overlapped beam members 21a and 21b. Has been.

The two upholstery members 12 and the two upholstery members 13 are each composed of a single beam member 14 and a superposed beam member 15 arranged at both ends thereof. However, the overlapped beam member 15 forming the uprising member 12 is longer than the overlapped beam member 15 of the uprising member 13. Further, each of the overlapped beam members 15 is formed by connecting the two overlapped beam members 21a and 21b, but the length of the overlapped beam member 21a is set to a long dimension including the overlapped beam member 21b. By doing so, the outer beam member 22 and the inner beam member 23 can be made into one overlapped beam member 15, respectively.

FIG. 4 is a perspective view showing an end portion of the single beam member 14 and an end portion of the overlapping beam member 15, and FIG. 5 is a perspective view showing a connecting portion between the single beam member 14 and the overlapping beam member 15.

The end plate 24 attached to the overlap beam member 15 is provided with a plurality of bolt attachment holes 26 corresponding to the bolt attachment holes 17 provided in the end plate 16 of the single beam member 14. As shown in FIG. 5, the single beam member 14 and the overlapped beam member 15 are fastened by a plurality of bolts 27 penetrating bolt mounting holes provided in both end plates 24, 16.

As shown in FIG. 3 and FIG. 5, the cover plate 31 has a plurality of bolts on the outer surface of the end portion of the single beam member 14 and the outer surface of the end portion of the overlapped beam member 15 so as to straddle them. It is fastened by 32. The cover plate 31 fastens the single beam member 14 and the overlapped beam member 15 on the outer side surface.

On the inner surface of the end portion of the single beam member 14 and the outer surface of the end portion of the overlapping beam member 15, a fire hitting piece 33 is fastened by a plurality of bolts 35 via a backing plate 34 across them. It As shown in FIGS. 3 and 5, the slamming piece 33 is formed of a plurality of steel plates having an irregular pentagonal planar shape.

As shown in FIG. 1, in order to hold the mountain retaining walls 11a to 11d provided on the side surface of the quadrilateral excavation portion 10, four uprising members 12 and 13 are arranged in a quadrangle on the same plane. In this case, four corner portions are formed by the upholstery materials adjacent to each other. In order to hold the respective corner portions, a hitting material 36 is attached between two fire hitting pieces 33 that are adjacent to each other via the corner portions. The hitting material 36 is made of an H-shaped steel material or the like, and the hitting material 36 is provided with a screw type jack 37 in order to apply a pressing force in the direction toward the hitting piece 33. However, a hydraulic jack may be provided instead of the screw type jack.

When the jack 37 is provided on the hitting material 36, the single beam member 14 has its end portion as a base end portion of bending deformation due to earth pressure applied to the single beam member 14 via the mountain retaining walls 11a to 11d. The bending moment of the material 14 can be calculated. When the fire hitting piece 33 is provided so as to be shifted from the end portion of the single beam member 14 on the overlapped beam member 15, the base end portion of the bending deformation of the single beam member 14 is located at the overlap beam member 15, so Therefore, the bending moment applied to the single beam member 14 becomes larger than that shown in FIG.

Therefore, as shown in FIG. 1, when the hitting piece 33 is attached to the connecting portion between the single beam member 14 and the overlapped beam member 15 and the jack 37 is provided on the hitting member 36, the bending moment applied to the single beam member 14 is increased. Therefore, a smaller high-strength beam material can be used as the single beam material 14.

As described above, the single beam member 14 and the overlapped beam member 15 have their outer surfaces connected by the cover plate 31 and their inner surfaces connected by the fire hitting piece 33. It has a function as a plate for connecting the one-beam member 14 and the overlapping beam member 15. As a result, conventionally, it has been necessary to fasten the cover plates to the outer surface and the inner surface, respectively, but in the present invention, one cover plate 31 is used to form one end portion of the single beam member 14 and the overlap beam member 15. Can be connected to one end of the. Therefore, compared with the case where the cover plate is bolted to the inner side surface and the outer side surface, the frame structure of the mountain retaining wall can be constructed in a short time, and the workability of constructing the frame structure can be efficiently performed. it can.

Further, since the single beam member 14 made of high-strength rolled steel for welded structure is used only inside the attachment point of the striking material 36, which requires high strength to support the retaining wall, it can be disposed with less waste. In addition, since the end plate 24 as a joint is present in the fired material mounting portion, it is a substitute for stiffener reinforcement. Furthermore, since the fire hitting piece 33 substitutes for the cover plate 31, the number of plates and the number of bolts can be reduced.

Moreover, since the stiffener plate 19 is attached to the single beam member 14 so as to be located at the end of the struck piece 33, the stiffener plate 19 is located at the portion where earth pressure is applied to the struck piece 33 from the mountain retaining wall. Therefore, the strength of the single beam member 14 can be increased.

(Second embodiment)

FIG. 7 is a partially omitted plan view showing a frame structure of a mountain retaining wall which is another embodiment. In this frame structure, unlike the case described above, the length of the overlapping beam member 15 is longer than the length of the single beam member 14. At the connection portion between the single beam member 14 and the overlapped beam member 15 in each of the uprising members 12, 13, the cover plate 31 and the struck piece 33 are provided as in the case shown in FIGS. 3 and 5 described above. Is bolted. However, the cover plate 31 is omitted in FIG. 7. As in the case described above, the stiffener plate 19 is attached to the single beam member 14 while being positioned at the end of the struck piece 33, and the strength of the single beam member 14 is increased.

The overlapped beam member 15 is composed of a first overlapped beam member portion 21a and a second overlapped beam member portion 21b. The overlapped beam member portion 21a is shown in FIG. 1 in comparison with the overlapped beam member portion 21b. Has been set longer than if. In order to hold the long overlapped beam members 21a, as shown in FIG. 7, a hitting piece 41 is attached to the inner surface of the overlapped beam member 21a, and a hitting piece 41 is provided between adjacent hitting pieces 41. 42 is attached.

(Third Embodiment)

FIG. 8 is a partially omitted plan view showing a frame structure of a mountain retaining wall which is still another embodiment. In this frame structure, although not shown, the two upholstery members 12 are formed by the single beam member 14 and the two overlapping beam members 15 as in the case described above. On the other hand, the two uprising members 13 are formed by the central beam member 45 and the beam members 15 connected to both ends thereof.

At the connecting portion between the single beam member 14 and the overlapping beam member 15 in the two uprising members 12, the cover plate 31 and the fire hitting piece 33 are fastened with bolts, as in the case described above. On the other hand, the hitting piece 33, which is connected to the hitting piece 33 attached to the uprising material 12 by the hitting material 36, is fastened to the overlapped beam 45.

As described above, even when the single beam member 14 is provided on two of the four upholstery members 12 and 13, the single beam member 14 and the overlapped beam member 15 are The strength of the uprising member 12 can be increased by attaching the cover plate 31 and the fire hitting piece 33 to the connection end. The frame structure of such a form is suitable when the earth pressure applied to the uprising material 12 from the mountain retaining walls 11a and 11b is higher than the earth pressure applied to the uprising material 13 from the mountain retaining walls 11c and 11d.

In the upholstery member 12 shown in FIG. 8, the overlapped beam member 15 is composed of two overlapped beam members 21a and 21b, whereas the overlapped beam member 15 of the upriser member 13 is one overlapped beam member. It is composed of beam members.

Similar to the frame structure shown in FIG. 7, a hitting piece 41 is attached to the inner surface of the overlapped beam member 21a, and a hitting material 42 is attached between adjacent hitting pieces 41.

(Fourth Embodiment)

FIG. 9 is a partially omitted plan view showing a frame structure of a mountain retaining wall which is still another embodiment. In this frame structure, the two uprising members 12 are formed by the single beam member 14 and the two overlapping beam members 15 as in the case described above. On the other hand, the two uprising members 13 are formed by the central overlap beam member 45 and the two overlap beam members 15 connected to both ends thereof, as in FIG. Each overlapped beam member 15 is configured by connecting two overlapped beam members 21a and 21b.

In the frame structure of this form, as in the case shown in FIG. 8, the earth pressure applied to the upholstery material 12 from the mountain retaining walls 11a and 11b is lower than the earth pressure applied to the upholstery material 13 from the mountain retaining walls 11c and 11d. It is suitable when it is high.

The present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the invention. In the above-described embodiment, the case is shown in which mountain retaining walls are respectively constructed on the side surfaces around the excavated portion that is excavated in the ground, and the uprising members 12, 13 are installed in the quadrilateral. , At the joint between the single beam and the overlapped beam that constitute two uprising members that are connected to each other to hold the mountain retaining walls that are provided on the sides so as to intersect at an angle such as a right angle The present invention can also be applied.

Also in each of the embodiments, it is possible to reduce the labor at the time of constructing the mountain retaining wall, achieve the shortening of the construction period, and improve the economical efficiency.

INDUSTRIAL APPLICABILITY The present invention can be applied to hold a mountain retaining wall arranged in a civil engineering construction site.

10 excavated part 11a-11d Yamadome wall 12,13 uprising material 14 single beam material 15 overlapped beam material 16 end plate 19 stiffener plates 21a, 21b overlapped beam material part 22 outer beam material 23 inner beam material 24 end plate 25 ribs Plate 31 Cover plate 33 Fire hitting piece 34 Patch plate 36 Fire hitting material 37 Jack 41 Fire hitting piece 42 Fire hitting material 45 Overlapped beam material

Claims (3)

A frame structure of a mountain retaining wall provided with an upholstery material horizontally arranged on the inner surface of the mountain retaining wall, and a flint material installed between the adjacent uprising materials,
A single beam member made of shaped steel, and a polymerized beam member made of a plurality of shaped steel members having a width dimension smaller than that of the single beam member and arranged at both ends of the single beam member to form the reentrant member. Forming,
Fastening the single beam member and the overlapped beam member by a cover plate arranged across the outer surface of the end portion of the single beam member and the outer surface of the end portion of the overlapped beam member,
Fastening the single beam and the polymerized beam by a hitting piece arranged across the inner surface of the end of the single beam and the inner surface of the end of the polymerized beam,
Fastening the flint material to the fluff receiving piece,
The frame structure of the Yamadome wall, which is characterized by this. The stiffener plate is provided on the single beam member at the end of the struck piece.
The frame structure of the mountain retaining wall according to claim 1, characterized in that. A jack for applying a pressing force to the hitting piece is provided on the hitting material,
The frame structure of the mountain retaining wall according to claim 1 or 2.

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