Construction method for crack-resistant cast-in-situ hollow floor

Abstract

The invention provides a construction method for a crack-resistant cast-in-situ hollow floor. The crack-resistant cast-in-situ hollow floor comprises a top flange plate (2), beams (3), a bottom flange plate (4) and combined filling members (5) placed in a floor ribbed beam gridding. The construction method includes casting wavy bottom flange concrete after reserving and pre-burying of pipelines, and then casting the beams and top flange concrete to construct the hollow floor (1). The inner surfaces of the top flange plate (2) and the bottom flange plate (4) are in a wavy shape (6). The value of the wave crest is larger than 50mm. The combined filling members are formed by more than three gas filled tubes (7) in parallel combination, and adjacent bonding portions (8) of the gas filled tubes are in close contact. The length of each single tube is as same as the width (51) of the combined filling members (5) when the combined filling members (5) are in parallel combination. The sum of the diameters of multiple tubes is as same as the length (52) of the combined filling members (5), and the ratio of the length (52) to the width (51) is not less than 0.7. The gas filled tube combined filling members (5) act with a steel tube supporting and separating component (9); the gas filled tubes are fully utilized, and the defects of punching resistance and cracking in the prior art are overcome according to features of the tubes; cost of the floor can be saved, convenient and rapid construction is realized, and the structure of the floor is more reasonable.

Description

technical field [0001] The invention relates to a new type of building floor, steel-concrete combined hollow floor, one-way densely ribbed groove floor and high-rise core tube floor, in particular to a method for building a crack-resistant cast-in-place hollow floor. Background technique [0002] At present, in the technical field of cast-in-place reinforced concrete hollow floors, a separate tubular filling body or square filling body is usually placed in the floor grid. After pouring concrete, an upper flange plate and a lower flange are formed around the single filling body. Slabs and rib beams are built into cast-in-place hollow floors, such as the ZL98231113.3 "concrete thin-walled cylinder member" obtained by the inventor. This patent is widely used in hollow floor projects and solves the problem of non-pumping However, due to the unequal rigidity in the two directions of the longitudinal tube and the horizontal tube, it is only used in the "I-shaped" cross-section flo...

AI Technical Summary

Problems solved by technology

[0004] In view of the prior art of cast-in-place hollow floors, there are hollow floors that use tubular filling members to form holes, the evacuation rate is low, and the saving is not obvious; the hole formation of square box-shaped components solves the two-way stress of hollow floors. and low evacuation rate, but there is a defect that anti-crack measures need to be provided for the flange plate under the floor. The filled components are combined into filling components instead of square filling components; and the wave shape formed by the combination of adjacent tubes when multi-tubular bodies are combined is used to pour concrete in the formed wave shape, and the peaks of waves appear on the inner surfaces of the upper and lower flange plates, forming a wave shape

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