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Method and tool for retracement of floor slab hogging moment steel bars

A technology of negative bending moment reinforcement and floor slabs, which is applied in the direction of construction, building structure, and building materials processing, etc., can solve the problem of poor control of the thickness of cast-in-place concrete floor slabs, the thickness of the protective layer of steel bars does not meet the specification requirements, and the negative bending moment The mechanical performance of steel bars can not be fully exerted and other problems, so as to achieve the effects of convenient production, improved cast-in-place quality and simple structure

Active Publication Date: 2015-08-05
CHINA CONSTR FOURTH ENG DIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Negative bending moment reinforcement: The reinforcement set up to resist negative bending moment is often called "negative reinforcement" in engineering. When floor concrete is poured, some floor negative bending moment reinforcements are trampled by construction operators to sink, deform and displace. The mechanical performance of the negative moment steel bars cannot be fully utilized, and the thickness of the steel bar cover cannot meet the specification requirements; the thickness of the cast-in-place concrete floor slab is not well controlled, and the above two points often become a difficulty in construction

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  • Method and tool for retracement of floor slab hogging moment steel bars
  • Method and tool for retracement of floor slab hogging moment steel bars
  • Method and tool for retracement of floor slab hogging moment steel bars

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Embodiment 1

[0017] Embodiment 1 of the present invention: a method for recalling the negative moment reinforcement of a floor slab. Firstly, concrete is poured on the floor. The floor negative moment reinforcement in the rest of the concrete is matched and connected, and then the floor negative moment reinforcement callback tool is straightened and vertically erected on the floor formwork so that the negative moment reinforcement is returned to the original design position. After 10s to 30s, the floor is The negative moment reinforcement callback tool is tilted to disengage the rest of the floor negative moment reinforcement, and then taken out from the concrete to realize the callback of the floor negative moment reinforcement. In this embodiment, the distance between the floor negative moment reinforcement and the design elevation of the floor template The concrete thickness of the floor slab is consistent (excluding the concrete protective layer of the negative moment reinforcement of t...

Embodiment 2

[0020] Embodiment 2 of the present invention, a method for recalling the negative moment reinforcement of the floor slab. Firstly, concrete is poured on the floor. Let the floor negative moment reinforcement in the rest of the concrete be connected together, then straighten the floor negative moment reinforcement callback tool and stand vertically on the floor formwork to make the negative moment reinforcement return to the original design position. After 10s to 30s, put the The floor negative moment reinforcement callback tool is tilted to separate the rest of the floor negative moment reinforcement, and then taken out from the concrete to realize the callback of the floor negative moment reinforcement. In this embodiment, the distance between the floor negative moment reinforcement and the floor formwork design elevation Consistent with the concrete thickness of the slab (excluding the concrete protective layer of the negative moment reinforcement of the slab).

[0021] A ki...

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Abstract

The present invention discloses a method and a tool for retracement of floor slab hogging moment steer bars. The method herein is arranged as that: cast concrete to a floor slab; insert the tool for retracement of floor slab hogging moment steer bar into the concrete before initial setting time; tilt the tool herein and making joint connections among the rest of the floor slab hogging moment steer bars in the concrete; straighten the tool and configure the tool to erect on the floor board in a perpendicular position so that the hogging moment steel bars are retraced to the original position as designed; hold on to the perpendicular position for 10 to 30 seconds, and incline the tool to disengage the rest of the floor slab hogging moment steel bars; take out the floor slab hogging moment steel bars, thus realizing the retracement. The method and tool of the present invention can elevate the hogging moment steel bars which are in a sinking status by being trampled by means of the tool. The method and tool of the present have the characteristics of convenient handling, recycled usage of steel bars, simple structure, easy processing, and practical usage, and can improve casting quality and reduce cost.

Description

technical field [0001] The invention relates to a method and a tool for pulling back negative bending moment steel bars of floor slabs, belonging to the technical field of construction engineering. Background technique [0002] Negative bending moment reinforcement: The reinforcement set up to resist negative bending moment is often called "negative reinforcement" in engineering. When floor concrete is poured, some floor negative bending moment reinforcements are trampled by construction operators to sink, deform and displace. The mechanical properties of the negative moment steel bars cannot be fully utilized, and the thickness of the steel bar cover cannot meet the specification requirements; the thickness of the cast-in-place concrete floor slab is not well controlled, and the above two points often become a difficulty in construction. Contents of the invention [0003] The purpose of the present invention is to provide a simple structure, practical and convenient floor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04G21/12
Inventor 彭军杨祥东郭亮方正明
Owner CHINA CONSTR FOURTH ENG DIV