Support-free medium-long prefabricated rib truss rib composite plate structure and preparation method thereof

Abstract

The invention discloses a support-free medium-long prefabricated rib truss rib composite plate structure and a preparation method thereof. The support-free medium-long prefabricated rib truss rib composite plate structure comprises a horizontal reinforcing mesh and truss reinforcing steel bars arranged on the horizontal reinforcing mesh; the horizontal reinforcing mesh comprises longitudinal reinforcing steel bars and transverse reinforcing steel bars connected to the longitudinal reinforcing steel bars in a lap joint mode; each truss reinforcing steel bar comprises an upper chord reinforcing steel bar, two lower chord reinforcing steel bars and a web member reinforcing steel bar, wherein the web member reinforcing steel bar is connected with the upper chord reinforcing steel bar and the two lower chord reinforcing steel bars to form an umbrella-shaped structure unit, the two lower chord reinforcing steel bars are arranged on the two sides of the longitudinal reinforcing steel bars in parallel respectively, and a concrete prefabricated rib is arranged between every two adjacent truss reinforcing steel bars; and a first concrete layer is poured on the lower portion of the horizontal reinforcing mesh and the lower portions of the truss reinforcing steel bars, and a second concrete layer is poured on the upper portions of the truss reinforcing steel bars. The support-free medium-long prefabricated rib truss rib composite plate structure has the advantages of being convenient to construct, convenient and fast to assemble, low in carbon, environmentally friendly, excellent in performance and the like, is suitable for plate structures of medium-long span fabricated concrete buildings and support-free construction, and greatly reduces construction cost.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a support-free mid-length prefabricated rib truss bar laminated plate structure and a preparation method thereof. Background technique [0002] The prefabricated concrete structure has the advantages of fast construction speed, convenient assembly, energy saving and environmental protection, and small amount of wet work on site. It has developed rapidly in China in recent years. At present, the floor slabs widely used in prefabricated concrete structures are steel truss laminated slabs. The steel truss laminated slab is composed of a prefabricated bottom slab and a cast-in-place laminated layer. The prefabricated bottom slab includes steel truss bars protruding from its surface, and the prefabricated bottom slab and the cast-in-place layer are connected as a whole through the steel truss bars. This kind of laminated slab has better integrity than the whole prefa...

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Problems solved by technology

The above-mentioned patents: the set ribs are full-length ribs (the length of the ribs is close to or equal to the length of the slab), and the cast-in-place layer needs to cover the upper surface of the ribs to connect the cast-in-place layers as a whole. Therefore, if the rib height is high, the final construction is completed The thickness of the laminated slab is very large, if the rib height is small, it is not obvious to improve the rigidity of the slab; at the same time, the ribs of the above laminated slab are integrated with the prefabricated bottom slab, which is difficult to manufacture; the most important thing is that the prefabricated bottom slab of the above composite slab The height of the ribs cannot be too high due to the limitation of the thickness of the slab. Therefore, when the span is large, the above-mentioned laminated slab still needs to be supported at the bottom of the slab during construction.

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