Construction method for cover plate of civil air defense stair

Abstract

The invention provides a construction method for a cover plate of a civil air defense stair. The method comprises the steps that vertical steel pipe supporting assemblies are uniformly erected below acover plate hole when a floor formwork is erected, the vertical steel pipe supporting assemblies are fixedly tied through rod pieces and fasteners to form supporting planes, the equidistant supporting planes form a vertical supporting system, and the top bearing surface of the vertical supporting system is located on the plane where a key keel of a cover plate formwork is located; the key keel, asecondary keel and a formwork body of the cover plate formwork are arranged at the cover plate hole; a first separation membrane is laid on the upper surface of the formwork body, embedded steel barsare arranged for the cover plate, and all the embedded steel bars are parallel and independent of one another; cover-plate concrete is poured, and vibrating and surface finishing are conducted till the interior of the concrete is solid and the exterior of the concrete is smooth; a second separation membrane is laid on the surface of the cover plate concrete; and the second separation membrane iscut into the cover plate concrete with the surface initially set through a cutting plate, and the concrete within the range of a cover plate is cut into plate strips. According to the construction method, the concrete is partitioned on site, the occupied space of prefabricated parts is saved, and top plate sealing is facilitated.

Description

technical field [0001] The invention relates to the technology of building structure engineering, in particular to a formwork support system of reinforced concrete slabs and a construction method thereof. Background technique [0002] Generally, the reinforced concrete slab adopts the construction technology of off-site prefabrication, transportation in place, and hoisting and installation. However, if the slab is slightly larger, it needs the cooperation of lifting machinery and transportation equipment to complete the construction. Therefore, the following restrictions often occur during construction: 1) Reinforced concrete The prefabrication of slabs requires a lot of space, and the site resources on the construction site, especially the space available for hoisting operations, are usually very limited; 2) The concrete slab is heavy, and a reinforced concrete slab of 0.04 cubic meters weighs about 100Kg, which is difficult to carry manually. Cranes and transport vehicles ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the construction method of the existing civil air defense cover board needs to occupy the construction site for a long time, and a large number of prefabricated concrete slats are transported and installed on site, resulting in the problem of high operating costs

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