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A Method of Reinforcing Steel Bars with Negative Moment of Floor Slabs

A technology of negative bending moment steel bars and floor slabs, which is used in construction, building structure, and building materials processing, etc. The mechanical properties of steel bars cannot be fully exerted, and the effects of convenient production, improved cast-in-place quality, and simple structure are achieved.

Active Publication Date: 2017-03-22
CHINA CONSTR FOURTH ENG DIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • A Method of Reinforcing Steel Bars with Negative Moment of Floor Slabs
  • A Method of Reinforcing Steel Bars with Negative Moment of Floor Slabs
  • A Method of Reinforcing Steel Bars with Negative Moment of Floor Slabs

Examples

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Embodiment 1

[0016] 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. It is connected with the floor negative moment reinforcement in the concrete, and the floor negative moment reinforcement callback tool includes a reinforcement rod 1, a handle 2 perpendicular to the reinforcement rod 1 is arranged on the top of the reinforcement rod 1, and a handle 2 is arranged on the bottom side of the reinforcement rod 1 A hook 3 perpendicular to the steel bar 1 is provided, and the hook 3 and the handle 2 are parallel to each other. At the bottom of the steel bar 1, there is a support bar 4 on the same straight line as the steel bar 1. The hook 3 is a straight line with an arc structure at one end. Rod, the length a of the hook 3 is 1 / 2 to 3 / 4 of the negative moment steel bar spacing of the floor, the arc end of the hook 3 is a 1 / 4 to 1 / 3 arc surface, and the arc radius b is the hook length a 1 / 6...

Embodiment 2

[0019] 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 floor slab (excluding the concrete protective layer of the negative moment reinforcement of the floor slab).

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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 for returning steel bars with negative moment of floor slab, and belongs to the technical field of building engineering construction. 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 negati...

Claims

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Application Information

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