In-site prestressed concrete sandwiched composite beamless floor structure system and construction method

Abstract

This invention discloses a kind of sandwich and compound beamless slab construction of watering prestress concrete and its constructing method. This construction includes beamless slab body, ribs of inner main and dark slabs and ribs of inner secondary dark slabs with cross arranged. The prestess and stress concrete reinforced bars are arranged in the ribs of main and dark slabs, and the stress concrete reinforced bars are laid out in the upper and lower crust of beamless slab body and in the inner secondary dark slabs with cross arranged. The inner space of the body is stuffed with polystyrene foam sandwich boards. In the job site, first, the form board is propped up and the prestress bars are arranged and stretched and drawn; second, the polystyrene foam sandwich boards should be laid out and fastened and the stress bars are arranged; then the concrete is poured and shaped into the construction, which can satisfy the constructing load-bearing requirements like fireproofing, sound insulation, heat insulation, high-intensity and light quality. Such beamless slab can be used in civilian and various industries construction.

Description

(1) Technical field

[0001] The invention relates to a floor structure system of multi-level and high-rise construction projects, especially a kind of cast-in-place prestressed concrete sandwich composite beamless floor structure suitable for construction projects with strict requirements on building storey height and large load and span system. (2) Background technology

[0002] At present, the prestressed or non-prestressed cast-in-place concrete girderless slab structure system adopted by the known traditional construction methods has a large slab thickness and self-weight, high cost, and is limited by the span of the slab, so it is difficult to popularize. In recent years, the prestressed cast-in-place concrete hollow floor structure system has appeared. Since the pipes used to form the hollow in the plate can only be arranged in one direction, the internal force distribution of the plate in the vertical and horizontal directions is quite different. The direction along t...

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