Prestress thick plate hollow floor construction method

Abstract

The invention relates to a prestress thick plate hollow floor construction method. The method comprises the steps: according to hollow floor design parameters, deepening the geometric dimension and arrangement parameters of a built-in hollow square box; determining arrangement parameters of an anti-floating tie bar; mounting a formwork; locating a hidden beam, a column cap, a multi-ribbed beam, ahigh-injection alloy square box and a reserved embedded facility and performing scribing; installing the hidden beam, column cap ribs, a plate bottom reinforcing steel bar, prestressed ribs and the reserved embedded facility; connecting the plate bottom reinforcing steel bar with the bottom template; laying a hollow square box bottom positioning device; laying a hollow square box; laying an anti-floating steel bar layer, and placing an upper positioning device; connecting the upper positioning device with the plate bottom reinforcing steel bar; placing a plate top reinforcing steel bar cushionblock, laying plate top reinforcing steel bars on the plate top reinforcing steel bar cushion block and performing binding, and tying the plate top reinforcing steel bars and the plate bottom reinforcing steel bars through tie bars; pouring concrete, and performing vibrating and maintaining; performing prestress tensioning, grouting and anchor sealing; and dismantling the formwork. The construction quality of the prestress hollow floor can be improved, and the field construction difficulty is reduced.

Description

technical field [0001] The invention belongs to the technical field of hollow floor construction, in particular to a construction method of prestressed thick plate hollow floor. Background technique [0002] With the further improvement of the use function of modern buildings, the demand for large space and beamless is increasing. As a new type of structural system, the cast-in-place concrete hollow floor has the characteristics of material saving, energy saving, sound insulation, earthquake resistance, flexible space, light weight, and low cost, which can well meet the current building needs and has developed rapidly. . Especially the prestressed cast-in-place concrete hollow floor combined with prestressing technology can provide a larger building space, has good economic benefits and social value, and has a very broad market prospect. [0003] However, compared with the construction of traditional ordinary floors, such structures will have phenomena such as the floating...

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Problems solved by technology

[0003] However, compared with the construction of traditional ordinary floors, such structures will have phenomena such as the floating and displacement of the built-in empty box, and the deviation of the prestressed tendons, which makes the rib beams of the floor, the geometric dimensions of the upper and lower slabs, and the prestressed tendons There is a large deviation in the spatial positioning of the building, which will lead to a significant drop in the mechanical performance of the floor in severe cases, and directly lead to engineering quality accidents

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