Recursive flow process construction method for ultra-long concrete floor structure

Abstract

The invention discloses a recursive flow process construction method for an ultra-long concrete floor structure. The method includes the following steps that the ultra-long concrete floor structure is partitioned; maximum tension stress and maximum shear stress of a concrete beam on a concrete floor in each bay are calculated, and the mixing proportion of concrete is adjusted; the recursive flow process construction direction of the overall concrete floor is determined; the pouring time interval between every two adjacent concrete floors is calculated; the rate of maximum hydration heat temperature raising and temperature lowering in the concrete beam and the concrete floor is determined; it is guaranteed that the maximum axial force applied to the concrete beam in the concrete hydration heat temperature raising and temperature lowering process does not exceed the bearing capacity at that time; concrete pouring is performed, and recursive flow process construction of the ultra-long concrete floor structure is completed. According to the construction method, when concrete is mixed, constraining force of the concrete beam on the concrete floor is strictly measured, if requirements are not met, the mixing proportion of the concrete is readjusted, and thus the construction quality is guaranteed.

Description

technical field [0001] The invention relates to concrete construction in the field of building construction, in particular to a recursive flowing water construction method for an ultra-long concrete floor structure. Background technique [0002] In order to avoid shrinkage cracks during the service period and construction period caused by the super-long concrete floor structure, it is necessary to set up a post-shrinkage pouring belt. The post-shrinkage pouring belt is generally 1-2 meters wide and the spacing is 40-50 meters. The filling time of the shrinking post-casting belt is 2 to 3 months after the concrete pouring of the floors on both sides of the shrinking post-casting belt is completed. However, the post-casting belt cannot solve all the cracking problems of the floor slabs. Many floors with shrinking post-casting belts often crack. On the contrary, the shrinking post-casting belt has become a serious obstacle to the further development of concrete floor structure ...

AI Technical Summary

Problems solved by technology

However, this recursive flow construction method is only for general single concrete structures. For super-long concrete floor structures, the ordinary recursive flow construction method cannot solve the problem of the binding force between the concrete floor and the concrete beam.

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