Construction method of tool-type steel bar support and negative bending moment steel bar for suspending floor slab

Abstract

The invention provides a tool type steel bar support and a construction method for suspending floor slab hogging-moment steel bars. The floor slab hogging-moment steel bars are temporarily suspended and fixed under the tool type steel bar support, so that the hogging-moment steel bars, the tool type steel bar support and constructional steel bars are connected into a whole body, and therefore, a steel bar net with high rigidity is formed. According to the construction method, the deviation, sinking and deformation of the floor slab hogging-moment steel bars which are caused in processes of concrete casting and compacting are effectively avoided, so that the positions of the floor slab hogging-moment steel bars as well as a floor slab protecting layer and the floor slab thickness are effectively controlled, meanwhile the pass percent of a steel bar protecting layer is guaranteed, and material wasting is avoided due to the reuse of the tool type steel bar support.

Description

technical field [0001] The invention relates to the technical field of building construction, and more specifically, relates to a tool-type steel bar support and a construction method for hanging negative moment steel bars on floor slabs. Background technique [0002] With the development of the times, the construction technology of construction projects has become more and more perfect. In the concrete pouring construction of construction projects, especially in the construction of concrete floors, the negative moment reinforcement of cast-in-place concrete floors can prevent cracking at the edge of the floor slab, so the thickness of the protective layer of reinforced concrete with negative moment of floor slabs plays an important role in the quality of the project. It plays a vital role, and because of this, people pay more and more attention to the thickness of the reinforced concrete protective layer of the negative moment of the concrete floor. Even so, the low pass r...

AI Technical Summary

Problems solved by technology

[0003] There are two main reasons for the low qualified rate of the cast-in-place concrete floor negative moment reinforced concrete cover thickness: one is that the cast-in-place concrete floor has annular cracks along the support due to the over-thickness of the cover, which affects the quality of the floor. On the other hand, because the protective layer is too thin, the strength of the steel bar cannot be fully exerted, and the splitting crack poses a serious threat to the corrosion of the steel bar, which directly affects the durability of the structure

[0004] At present, the commonly used methods to control the thickness of the reinforced concrete protective layer of cast-in-place concrete floor slab negative moment include the use of reinforced horse stools, shaped fine stone concrete pads and polyethylene polymer pads to support the negative moment reinforcement of the floor slab. The structural form not only wastes materials, but also the accuracy of the positioning of the steel bars and the thickness of the protective layer cannot be guaranteed

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