Modified concrete superposition board floor structure with shear keys and connection method

Abstract

The invention relates to the field of assembly concrete buildings, in particular to a modified concrete superposition board floor structure with shear keys and a connection method. The produced floor can serve as a floor applied in the assembly concrete buildings. An original superposition board floor comprises cast-in-situ layers and precast bottom boards which are arranged up and down, the shear keys are arranged on the precast bottom boards, the precast bottom boards are connected with the cast-in-situ layers through the shear keys, and a firm combination structure is formed. Two lateral faces of the original precast bottom boards are changed into slopes, and the contact area between the original precast bottom boards and the cast-in-situ layers is increased; four lateral faces of the precast bottom boards are made to be rough surfaces, and the friction between the precast bottom boards and the cast-in-situ layers is increased; lap joint rebar grooves are additionally formed in two sides of each precast bottom board, and lap joint rebars are arranged in the lap joint rebar grooves, so that equivalent transfer of tensile stress of the rebars at the bottoms of the boards is achieved. Meanwhile, steel rods with threads at the ends are embedded in a precast beam and matched with fixing steel boards and fixing nuts for use, and the superposition board floor structure is connected to the beam. Firm connection between superposition board floor structures as well as between the superposition board floor structure and the beam is achieved effectively through the above measures.

Description

technical field [0001] The invention relates to the field of prefabricated concrete buildings, in particular to an improved concrete composite slab floor structure with shear keys and a connection method, and the produced concrete composite slab floor can be used as a floor slab used in prefabricated concrete buildings. Background technique [0002] At present, in the actual prefabricated concrete buildings, self-supporting reinforced truss concrete laminated slabs are commonly used in floor slabs. This kind of laminated slab has the disadvantages of thick floor slabs and high engineering cost. In order to solve this problem, the Chinese invention patent (patent number 201210279952.2, publication number CN102839773A) discloses a "concrete laminated slab floor with shear keys, prefabricated structure and construction method", but does not involve concrete laminated slabs with shear keys. How plywood floors are connected to each other and to beams. At present, the steel bar c...

AI Technical Summary

Problems solved by technology

At present, the steel bar connection method between the laminated slab structure is difficult to realize the equivalent transfer of the tensile stress generated by the bending moment of the steel bar at the bottom of the slab. The connection between the laminated slab structure and the beam has no anchoring measures between the prefabricated floor and the beam.

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