Concrete construction method for cast-in-place section of prefabricated concrete structure

Abstract

The invention relates to construction methods of assembling-type concrete structures, in particular to a cast-in-place section concrete construction method of an assembling-type concrete structure. The cast-in-place section concrete construction method comprises the steps that when an outer wall body is prefabricated, embedded parts and steel bar meshes are buried and additionally arranged inside an outer wall protective layer of a cast-in-place section correspondingly; a cast-in-place section formwork is connected to the inner side of a wall body structural layer through mutual-pulling screws and buckling pieces, wherein one end of each mutual-pulling screw is connected with a sleeve and the other end of each mutual-pulling screw penetrates out through a reserved hole in the cast-in-place section formwork, and the mutual-pulling screws are sleeved with PVC casing pipes. Cast-in-place section concrete is poured in grouting holes reserved inside the wall body structural layer. After the cast-in-place concrete reaches designed strength, the buckling pieces can be loosened, the cast-in-place section formwork can be disassembled, the mutual-pulling screws are rotated to enable the mutual-pulling screws to be separated from the sleeves, and then the mutual-pulling screws are drawn out from the PVC casing pipes. The cast-in-place section concrete construction method of the assembling-type concrete structure solves the problems that the surface of a warm-keeping protection layer cracks and deforms due to the through-wall screws and water seepage occurs in an outer wall, reduces the workload of outer wall face repairmen, and improves the pouring efficiency of the cast-in-place section concrete.

Description

technical field [0001] The invention relates to a construction method for a prefabricated concrete structure, in particular to a construction method for the cast-in-place concrete of the prefabricated concrete structure. Background technique [0002] At present, in the construction of prefabricated concrete structures, the situation of cast-in-place joints of exterior walls will be encountered. The existing method is generally to use the thermal insulation protection layer on the outside of the cast-in-place section as the outer formwork of the cast-in-place part, and then punch holes in the thermal insulation protection layer of the outer wall to connect the thermal insulation protection layer with the inner formwork through the wall screw, so as to realize Pouring of cast-in-place joints. However, this operation method requires the screw to penetrate the thermal insulation protection layer outside the cast-in-place section, and the 50mm thick protective layer is not stron...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the above-mentioned problem of cracking and deformation of the protective layer in the concrete pouring process, and provides a concrete construction of the cast-in-place section of the assembled concrete structure that can avoid the occurrence of water seepage of the outer wall, reduce the amount of later repair of the thermal insulation protective layer, and improve the construction efficiency. method

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