Ribbed steel bar truss concrete superimposed sheet and construction method thereof

Abstract

A ribbed steel bar truss concrete superimposed sheet and a ribbed steel bar truss concrete construction method comprise a prefabricated layer and a superimposed layer. The prefabricated layer comprises a steel bar truss net and a concrete layer arranged on the lower portion of the prefabricated layer. A steel bar truss is composed of a lower chord steel bar, an upper chord steel bar and a web member steel bar connecting the lower chord steel bar and the upper chord steel bar. The steel bar truss net is composed of the steel bar truss, an additional steel bar shelved on the lower chord steel bar and vertical to the steel bar truss and a longitudinal steel bar in the lower portion of the prefabricated layer and parallel to the lower chord steel bar of the steel bar truss in the same plane. A plurality of concrete ribs are arranged on the upper end face of the concrete layer along the longitude direction and arranged in parallel. The superimposed layer is a cast-in-place concrete layer arranged on the prefabricate layer. A steel rib net is buried in the superimposed layer. The superimposed layer is connected with the upper chord steel bar in the steel bar truss of the prefabricate layer. The superimposed layer comprises an upper longitudinal bar and the additional steel bar vertical to the upper chord steel bar, and poured into a whole with the upper chord steel bar in the steel bar truss of the prefabricate layer and the web member steel bar. The ribbed steel bar truss concrete superimposed sheet and the ribbed steel bar truss concrete construction method have the advantages of being reasonable in steel bar overall arrangement, good in economy, convenient to hoist and transport, and effective in solving problem of sheet joint cracking.

Description

technical field [0001] The invention relates to the technical field of building components, in particular to a ribbed reinforced truss concrete composite slab and a construction method thereof. Background technique [0002] At present, the reinforced truss concrete composite slab has good integrity, does not require on-site formwork and temporary support, and has a fast construction speed, and is easy to hoist and transport, which fully has the characteristics of residential industrialization. limited, and its economic span without temporary support is also limited. [0003] Therefore, Chinese utility model patent 201120451880.6 discloses a self-supporting ribbed reinforced concrete laminated slab, which adopts the method of adding concrete longitudinal ribs, which greatly improves the bending stiffness of the floor, so that the reinforced truss concrete laminated floor has no temporary support The economic span has greatly increased. However, since the reinforced steel ba...

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Problems solved by technology

However, because the reinforced steel bars are all made of steel trusses, the layout of the stressed steel bars can only be realized by adjusting the spacing of the trusses, which leads to a waste of steel bars and an increase in the cost of the trusses; Reinforced trusses can improve rigidity, be easy to hoist, increase the superposition effect, and have the advantages of being able to run pipelines under the upper chord reinforcement, but there are many problems in construction and slab joint treatment.

[0004] In addition, in the prior art, for the seam treatment methods of laminated slabs that are treated as one-way slabs, the commonly used methods are laying anti-cracking steel bars (broken line steel bars or welded steel mesh) on the slabs and placing transverse steel bars. This method cannot effectively prevent cracking at the slab joints for concrete laminated slabs without temporary support during construction (generally, the thickness of the prefabricated slab is relatively large).

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