Long-span long-narrow concrete honeycomb open-web sandwich floor covering and manufacturing method

Abstract

The invention discloses a long-span long-narrow concrete honeycomb open-web sandwich floor covering which comprises an upper chord layer and a lower chord layer. The lower chord layer comprises a plurality of orthohexagonal grids formed by open web girders in a crossed mode, each short edge is formed by edges and diagonal lines of regular hexagons alternately, and each support on the short edges of the covering is connected with one corresponding open web girder, wherein the included angle between each short edge and the corresponding open web girder is 60 degrees; and each support on the long edges of the covering is connected with two corresponding symmetrically arranged open web girders, wherein the included angle between each long edge and the corresponding open web girder is 30 degrees. The upper chord layer is a regular triangular prefabricated slab fixedly connected with the lower chord layer, so that a reinforced concrete floor plate with regular triangular grids is formed, and a concrete layer is poured on an orthohexagonal prefabricated slab. By improving the structure of the honeycomb open-web sandwich floor covering, the effect that the covering is prevented from being overreinforced, and constructional reinforcement defects are avoided is guaranteed, ideal technical and economical indexes can be met, and the construction policy that the covering is applicable, economical, environmentally friendly and attractive is met.

Description

technical field [0001] The invention relates to a large-span narrow-long plane concrete honeycomb hollow sandwich slab floor and a manufacturing method thereof, belonging to the technical field of building structures. Background technique [0002] Since the mid-1990s, multi-layer and large-span (18m~39m) concrete hollow sandwich slab floors have successively appeared in construction projects in more than ten provinces, municipalities, and autonomous regions across the country, with a construction area of ​​more than 1 million square meters, and obtained With good technical and economic indicators, the grid composition of the fasting floor at that time was mainly two types: orthogonal and orthogonal. [0003] With the development of economic construction, in order to save land and promote the construction of ecological civilization, the Ministry of Land and Resources issued the "Regulations on Conservation and Intensive Use of Land" (2010 No. 61 Document). The development of ...

AI Technical Summary

Problems solved by technology

This kind of grid structure, when the floor plane is close to square (Lx / Ly1.5) plane, can meet the requirement of uniform stress, but the fly in the ointment is that when the floor When the roof is a narrow and long plane, the mechanical model of the floor is a "one-way slab". The internal force (including the support reaction force) distributed at the long side support is large, and the short side is correspondingly small. Side (Lx) Angle 60 0 The vierendeel beams are connected, but at the place where the stress on the short side is small, there are two beams with an angle of 30 0 Vierendeel beams are connected, resulting in uneven stress, making the vierendeel beams near the long-side support super-reinforced, and the short-side vierendeel beams being reinforced according to the structure, which cannot reach the ideal technical and economic indicators. For this reason, it is necessary to study long-span narrow-long type Concrete honeycomb hollow sandwich slab floor, thereby overcoming the above problems

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