Super-long floor concrete post-pouring seam design and construction process

Abstract

The invention belongs to the field of structural design and construction and particularly relates to a super-long floor concrete post-pouring seam design and construction process. The design and construction process mainly includes the following steps of 1, determining of a beam and slab post-pouring seam sideline; 2, mounting of a beam slab panel; 3, determining of a beam and slab unbonded rebar area; 4, binding of beam steel and filling of a beam post-pouring seam; 5, binding of slab steel and filling of a slab post-pouring seam; 6, pouring of beam and slab concrete; 7, curing of the concrete; 8, pouring of the post-pouring seams; 9, curing of the post-pouring seams. According to the super-long floor concrete post-pouring seam design and construction process, sufficient extension strain capacity of a post-pouring seam unbonded rebar is scientifically utilized, the purpose of releasing temperature stress of floor concrete is achieved, and it is guaranteed that a super-long floor is free of cracking. Compared with a traditional post-pouring belt construction method, phenomena of cracking of floors on the two sides of a post-pouring belt and rebar corrosion are avoided, construction operation is simple, the construction period is greatly shortened, comprehensive cost is greatly saved, remarkable economic and social benefits are achieved, and the design and construction process meets construction requirement of high efficiency, energy conservation and environmentally-friendliness.

Description

technical field [0001] The invention relates to a super-long floor concrete post-casting joint design and construction process, which belongs to the cross-technical field of structural design and construction, and is suitable for the temperature post-casting joint design and construction of various structural system floors, and is used to replace the traditional super-long concrete post-casting joint design and construction technology. Long floor concrete temperature after pouring belt. Background technique [0002] At present, there are more and more super-large flat buildings. In order to solve the problem of temperature stress release and structural cracking during super-long floor concrete construction, the method of setting the temperature of the floor and then pouring the belt is generally used to solve it. However, engineering practice has proved that the temperature post-cast belt has the following construction disadvantages: First, when pouring floor concrete, the c...

AI Technical Summary

Problems solved by technology

However, engineering practice has proved that the temperature post-cast belt has the following construction disadvantages: First, when pouring floor concrete, cement slurry often leaks from the steel wire mesh on both sides of the post-cast belt into the post-cast belt, which seriously restricts the release of the temperature stress of the floor concrete; The second is that the garbage formed by chiseling the post-casting belt needs to be removed from the support system before it can be cleaned up, and the post-casting belt support system needs to be erected twice, which is not only labor-intensive and time-consuming, but also causes damage to both sides of the post-casting belt area during the removal of the support system. The floor is cracked; the third is that the exposed steel bars in the post-casting belt are severely corroded and need to be derusted, etc.

To sum up, the traditional post-pouring belt construction technology not only weakens the floor bearing capacity, seismic performance and temperature stress release function, but also has cumbersome procedures, long construction period and high comprehensive cost. It has become a national key technology that needs to be solved urgently problem

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