A prefabricated large-span composite steel truss concrete laminated slab and its construction method

Abstract

The invention discloses a fabricated large span combined steel truss concrete composite slab and a construction method thereof. The fabricated large span combined steel truss concrete composite slab comprises angle steel, a concrete prefabricated layer, slab bottom main force bearing bars, slab bottom distribution bars and steel truss force bearing bars. Pairs of angle steel are arranged longitudinally in a parallel mode; the two pieces of angle steel in each pair are arranged in backward direction, and a gap is left between two angle steel web plates. The steel truss force bearing bars used for connecting pairs of angle steel web plates are arranged at the top ends of the pairs of angle steels in the longitudinal direction correspondingly. The slab bottom main force bearing bars are arranged in the longitudinal direction, and the upper ends of the slab bottom main force bearing bars are flush with the upper surfaces of angle steel flanges. The slab bottom distribution bars are arranged in the transverse direction, located on the slab main force bearing bars and connected with the angle steel web plates. The slab main force bearing bars, the slab bottom distribution bars and the angle steel flanges are all in the concrete prefabricated layer. The bearing capacity requirement of site construction of the composite slab is met, large span and support-free construction is achieved, and the construction period is shortened. The thickness of the slab is small, so that hoisting and mounting are convenient, the construction period is shortened, and the self weight of a whole building is reduced.

Description

technical field [0001] The invention belongs to the industrialized production of assembled high-rise building system technology, and in particular relates to an assembled large-span composite steel truss concrete laminated slab, and also relates to a construction method of the assembled large-span composite steel truss concrete laminated slab. Background technique [0002] The General Office of the State Council issued "Several Opinions on Promoting Housing Industrialization and Improving Housing Quality" in 1999, and on January 1, 2013, in the form of 2013 No. 1 document, forwarded the "Green Building Action Plan" of the Development and Reform Commission and the Ministry of Housing and Urban-Rural Development ", the document focuses on fully understanding the implementation of green building actions, and lists "promoting the industrialization of construction" as one of the ten important tasks. [0003] Prefabricated buildings have promoted the industrialization of construct...

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Problems solved by technology

[0004] (1) When the slab span is large, due to the insufficient bearing capacity of the laminated slab, it is necessary to set up corresponding vertical supports during the construction process, which leads to the extension of the construction period

[0005] (2) Existing laminated slabs are all prefabricated slabs, and the laminated slabs are floor slabs after being installed on site. Since the thickness of the laminated slabs is the thickness of the floor slabs, the thickness of the laminated slabs is relatively large after the production is completed. Very difficult, prolonging the construction period, and the weight of the whole building is heavy

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