Cast-in-place concrete hollow slab with GRF box member fixed by flat-ended internal threaded rod

Abstract

The invention discloses a cast-in-place concrete hollow slab with a GRF box member fixed by a flat-ended internal threaded rod, and the cast-in-place concrete hollow slab belongs to constructional engineering. The slab comprises a flat-ended internal threaded rod, threaded rod forked hooks, a screw, a fixing lead wire, a compression bar, a GRF box body, reinforcing steel bars, a steel wire mesh piece and a formwork. The slab is characterized in that the GRF box body is tied and fixed through the flat-ended internal threaded rod which is fixed and vertically arranged on the formwork through the screw which penetrates through the formwork and the fixing lead wire which is sleeved with the threaded rod forked hook on the other end of the flat-ended internal threaded rod. Compared with the prior art, the slab has the advantages of simplicity in structure, easiness in production, convenience in use, low cost, accurate positioning, reliable fixing, no exposed bar end and wire end residues after form removal and the like; moreover, the forked threaded rod jacks and supports a steel reinforcement cage and, so that the steel reinforcement cage can be laid more standardly and accurately; the internal quality of a concrete structural body is improved; and consequently, the slab has good popularization and application values.

Description

1. Technical field: [0001] The invention belongs to construction engineering, and in particular relates to a cast-in-place concrete hollow floor slab for fixing a GRF box member with a flat-head internal thread screw. 2. Background technology: [0002] The GRF box components are embedded in the concrete of the floor slab as an internal formwork to reduce the weight of the floor slab, solve the problem of large bays, large spans, light weight, no exposed beams and wide partial beams, and at the same time meet the sound insulation, heat insulation and earthquake resistance of the building , Energy saving and environmental protection requirements have been widely recognized and applied by the industry. However, there is no standardized and generally accepted construction method for the measures to be taken to ensure that the GRF cabinet is stable in the designed space. In the prior art, the push-up and pull-down technologies are widely used, but there are also many technical d...

AI Technical Summary

Problems solved by technology

The main problems are: 1. Set the fulcrum of pressing up and pulling down the fixed GRF box components on the steel cage. When the total buoyancy of the GRF box is greater than the total weight of the steel cage during pouring, the overall position of the steel cage will be shaken, forming Quality accident; 2. Set the fulcrum of pressing up and pulling down to fix the GRF lower box member outside the concrete structure. Careless operation will still affect the quality level. At the same time, it will also bring a lot of extra work to the later demolition. Remnants and broken heads; 3. The fixing operation relies more on experience, and it is difficult to determine the height and distance of tension and compression by visual inspection, which is difficult to locate accurately

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