CN204940644U - Apleuria beam form box sandwich steel bar concrete floor - Google Patents

Abstract

A ribless beam formwork box sandwich reinforced concrete floor system includes a double-layer reinforcement cage composed of upper and lower layers of steel mesh and a light-weight insulation board formwork; the light-weight insulation board formwork is a square formwork box cut four Formed at a right angle, the lightweight insulation board mold box is centrally symmetrical, and there is a hole at the center point of the lightweight insulation board mold box. The beneficial effect of the utility model lies in that: the use of the floor slab reduces the weight of the structural members while achieving a large span; at the same time, the construction process of the floor slab adopts the integral cast-in-place construction method, which reduces the construction cost compared with the ordinary beam-slab structure. process, the height of the floor is reduced, and at the same time, it has better effects in terms of heat preservation, heat insulation and sound insulation.

Description

Ribless Beam Formwork Box Sandwich Reinforced Concrete Floor Slab

technical field

The utility model belongs to the field of construction engineering, and in particular relates to a reinforced concrete floor slab sandwiched by a ribless beam formwork box. The floor slab is suitable for reducing the self-weight of structural components while realizing a relatively large span (spanning).

Background technique

In the entire structural system formed by the floor, columns and foundations, the floor is an indispensable part. Ordinary floors can only be about 6 meters. When the span of the floor is greater than 6 meters, generally a force-bearing girder will be installed in the middle of the floor to form a beam-slab floor to reduce the calculated span of the floor. Setting the floor girder will cause the floor The increase of the height will cause uneconomical consequences. If the load-bearing girder is not installed, the self-weight and reinforcement of the floor slab will be greatly increased, which will also greatly increase the cost of the floor.

For this reason, some domestic scholars have conducted some research on long-span floor slabs. At present, the floor slabs that have been successfully developed and applied include thin-walled tube hollow floors, internal mold well-shaped stiffener cavity large slab series floors, etc. Compared with common floor structures, these hollow floors have certain advantages in comprehensive cost and convenient construction, but they also have some shortcomings. For example, the thin-walled tube hollow floor has the disadvantage that it can only bear force along the rib direction, and its calculation model is a one-way slab. Under the condition that all four sides have support conditions, it is obviously unreasonable for the floor to bear force in one direction; The series of floors such as stiffeners, cavity and large slabs cannot be separated from the existence of rib beams. For example, thin-walled boxes, laminated boxes, boxes, and mold box-filled floor structures are all beams as stress members, and slabs are stressed as a whole. The effect is not great, and it is difficult to form the whole floor at one time.

Considering the environment and construction cost, it is necessary to design a floor slab that can bear forces in two directions, and there is no rib beam in the floor slab, so as to reduce the binding of rib beam reinforcement, reduce man-hours, protect the environment and reduce construction costs.

Contents of the invention

The purpose of this utility model is to address the deficiencies in the prior art and propose a reinforced concrete floor slab without ribbed formwork box. The use of the said floor slab reduces the self-weight of the structural members while realizing a larger span; The construction process of the floor slab adopts the integral cast-in-place construction method, which reduces the construction process and the height of the floor compared with the ordinary beam-slab structure, and has better effects in terms of heat preservation, heat insulation and sound insulation.

A ribless beam mold box sandwich reinforced concrete floor slab described in the utility model includes a double-layer reinforcement cage and a lightweight insulation board mold box composed of upper and lower layers of steel mesh;

The lightweight thermal insulation board mold box is formed by cutting four right angles from a square mold box, the lightweight thermal insulation board mold box is centrally symmetrical, and there is a hole at the central point of the lightweight thermal insulation board mold box;

The lightweight thermal insulation board formwork boxes are laid close to each other between the upper layer and the lower layer of steel mesh;

Pour concrete into the double-layer reinforcement cage, so that the upper reinforcement mesh, the lightweight insulation board formwork and the lower reinforcement mesh become a whole;

The two opposite sides or four sides of the ribless beam formwork sandwich reinforced concrete floor slab are supported on the frame beam or the load-bearing wall.

Further, the distance between the opposite sides of the lightweight insulation board formwork box should be less than 1500mm, and the hole diameter of the lightweight insulation board formwork box should be less than 300mm.

Further, the thickness of the concrete on the upper surface of the lightweight insulation board formwork box and the concrete on the lower surface of the lightweight insulation board formwork box is less than 70mm.

Further, the concrete on the upper surface of the formwork box of the light-weight insulation board and the concrete on the lower surface of the formwork box of the light-weight insulation board are both provided with a single row of two-way stressed steel bars.

Further, the lightweight insulation board formwork is made of polystyrene board material with light weight, and the outer surface of the lightweight insulation board formwork is wrapped with a layer of cement mortar barbed wire, so that it can meet the deformation requirements under construction load.

Further, the thickness of the concrete floor is less than 250mm.

The advantages of the ribless beam mold box sandwich reinforced concrete floor slab and the construction technology described in the utility model are: the height of the ribless beam mold box sandwich reinforced concrete floor slab is smaller than the traditional beam slab floor, which reduces the floor height and reduces the amount of concrete , reduce the cost, and at the same time, the floor of this system is flat, and generally does not need a suspended ceiling; the effective stress parts of the slab are distributed on the upper and lower sides of the structure, which increases the bending stiffness of the structure. The overall stiffness of the floor is good, and the deformation is small. Good seismic performance; due to the light-weight formwork box in the floor, the equivalent thickness of the floor is smaller than that of the primary and secondary beam floor structure and the unbonded prestressed concrete slab structure. Compared with the beam floor and unbonded prestressed reinforced concrete floor, the concrete consumption can be saved by 10% to 40%, the self-weight of the floor is reduced, and the corresponding column, wall and foundation are reduced; The horizontal seismic action of the floor is reduced; compared with the ribbed floor, the overall rigidity increases due to the extra floor, which is more beneficial to the force; in terms of building use, the bottom surface of the floor is flat and more beautiful, and its thermal insulation , heat insulation and sound insulation effect is better.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a ribless beam formwork sandwich reinforced concrete floor slab;

Fig. 2 is a kind of structural representation of the lightweight thermal insulation board formwork box of sandwich reinforced concrete floor slab without rib beam formwork box;

In the figure: 1 upper reinforced concrete slab, 2 lightweight insulation board formwork box, 3 concrete column, 4 lower reinforced concrete slab, 5 frame beam or load-bearing wall, 6 slab internal reinforcement.

detailed description

As shown in Figure 1, the ribless beam formwork box sandwich reinforced concrete floor slab described in the utility model includes a double-layer reinforcement cage and a light insulation board formwork box composed of upper and lower two-layer steel mesh; on the whole, it can be divided into The upper reinforced concrete slab 1, the lightweight insulation board formwork 2, the lower reinforced concrete slab 4 and the concrete columns 3 connecting the upper and lower slabs formed by pouring concrete in the holes of the lightweight insulation board formwork 2.

The lightweight thermal insulation board mold box 2 is formed by cutting four right angles from a square mold box. The lightweight thermal insulation board mold box 2 is centrally symmetrical. There is a hole at the central point of the lightweight thermal insulation board mold box 2 .

In particular, it should be noted that the two opposite sides or four sides of the ribless beam formwork sandwich reinforced concrete floor slab are supported on the frame beam or the load-bearing wall 5 .

The construction process of the ribless beam formwork box sandwich reinforced concrete floor slab is as follows:

Build a reinforced concrete floor support formwork, and bind the lower floor steel mesh on the support formwork structure;

Laying the lightweight insulation board formwork tightly against each other on the lower reinforcement mesh;

Bind the steel bars in the hole of the lightweight insulation board formwork box and the upper layer of steel bars, so that the upper layer of reinforcement mesh, the lightweight insulation board formwork box and the lower layer of reinforcement mesh are integrated;

Continuing to pour concrete into the double-layer steel cage, so that the lower steel mesh, the lightweight insulation board formwork box and the upper steel mesh form a whole. It is required to form the pouring process once, and then carry out routine maintenance. After the concrete strength reaches the design strength, remove the supporting formwork , promptly complete the making of the ribless beam mold box sandwich reinforced concrete floor slab described in the utility model.

After pouring concrete, the lower surface of the light insulation board formwork box to the lower surface of the floor is the lower floor plate, and the upper surface of the lightweight insulation board formwork box to the upper surface of the floor plate is the upper floor plate. The thick soil for pouring concrete on the upper floor plate and the lower floor plate should be controlled Within 70mm; the total thickness of the sandwich reinforced concrete floor slab of the ribless beam formwork box is controlled within 250mm; the opposite side distance of the light insulation board formwork box should be less than 1500mm, and the hole diameter of the light insulation plate formwork box Less than 300mm.

In order to enhance the acceptance characteristics of the floor slab, a single row of two-way stress-bearing slab internal reinforcement 6 can be added between the upper slab and the lower slab.

Claims (6)

1. A kind of ribless beam formwork sandwich reinforced concrete floor slab, is characterized in that: comprise the double-deck reinforcement cage and the light insulation board formwork that are made up of upper and lower two-layer steel mesh; The lightweight thermal insulation board mold box is formed by cutting four right angles from a square mold box, the lightweight thermal insulation board mold box is centrally symmetrical, and there is a hole at the central point of the lightweight thermal insulation board mold box; The lightweight thermal insulation board formwork boxes are laid close to each other between the upper layer and the lower layer of steel mesh; Pour concrete into the double-layer reinforcement cage, so that the upper reinforcement mesh, the lightweight insulation board formwork and the lower reinforcement mesh become a whole; The two opposite sides or four sides of the ribless beam formwork sandwich reinforced concrete floor slab are supported on the frame beam or the load-bearing wall. 2. A kind of ribless beam formwork sandwich reinforced concrete floor slab as claimed in claim 1, characterized in that: the distance between the opposite sides of the light insulation board formwork should be less than 1500mm, and the distance between the light insulation plate formwork Hole diameter is less than 300mm. 3. A kind of ribless beam formwork sandwich reinforced concrete floor slab as claimed in claim 1, characterized in that: the thickness of the concrete on the upper surface of the light insulation board formwork box and the concrete on the lower surface of the light insulation board formwork box Less than 70mm. 4. A kind of ribless beam mold box sandwich reinforced concrete floor slab as claimed in claim 1, is characterized in that: the concrete on the upper surface of the lightweight insulation board mold box and the concrete on the lower surface of the lightweight insulation board mold box are both There is a single row of two-way stressed steel bars. 5. A kind of ribless beam formwork sandwich reinforced concrete floor slab as claimed in claim 1, characterized in that: the lightweight insulation board formwork is polystyrene board material with light weight, and the light insulation board formwork The outer surface of the box is wrapped with a layer of cement mortar barbed wire. 6 . The reinforced concrete floor slab without ribbed formwork box sandwich as claimed in claim 1 , wherein the thickness of the concrete floor slab is less than 250 mm. 7 .