Construction method of a prefabricated floor slab

Abstract

The invention discloses a construction method for an assembled floor slab, which comprises the following steps: 1) processing corrugated steel bars: processing several steel bars bent in the same direction and protruding to form an arc-shaped arch; 2) processing corrugated steel trusses : use the corrugated steel bar prepared in step 1) as the upper chord steel bar, and weld it together with the web member and the lower chord steel bar to form a corrugated steel truss; 3) prefabricate the corrugated steel truss and the bottom plate to form a reinforced truss building 4) Use a straightening device to straighten the arc-shaped arch on the upper chord reinforcement of the corrugated steel truss; 5) Concrete the reinforced truss floor deck in step 4). The present invention straightens the upper chord steel bar of the corrugated steel truss through a special straightening device, pre-applied load on the upper chord steel bar, which will offset part of the concrete load, improve the stress state of the floor, and increase the overall rigidity of the structure, while the pre-load of the bottom slab The arching also reduces the bending pressure of the floor due to the load and ensures the flatness of the floor deck.

Description

technical field [0001] The invention relates to the field of building technology, in particular to a construction method for a prefabricated floor slab. Background technique [0002] Prestressed concrete structure, that is, before the structure bears the external load, some artificial method is used in advance to create a stress state inside the structure, so that the area where the structure generates tensile stress during the use stage is first subjected to compressive stress. This compressive stress is related to the use The tensile stress generated by the stage load will offset part or all of it, thereby delaying the appearance of cracks and limiting the development of cracks, so as to improve the structural rigidity. However, the existing prestressed concrete structure has a series of disadvantages such as complicated process, high quality requirements, special equipment and high engineering cost, which limit its application. [0003] With the development of industrial...

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a construction method for prefabricated floor slabs, so as to solve the problem that the concrete in the tensioned part of the existing prefabricated floor slabs is prone to cracking and cannot play the role of tensioned steel bars during work. Problems requiring additional support, increasing construction costs and construction procedures

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