Long and narrow deformation joint of double shear wall and construction method

Abstract

The invention relates to a long and narrow deformation joint of a double shear wall and a construction method. The long and narrow deformation joint structurally and mainly comprises an inner side formwork, an outer side formwork, a back ridge, a frame support, an oval steel pipe, a split screw and a shelving platform plate. The construction method mainly comprises the construction steps of formwork manufacturing and splicing, shelving platform mounting, inner side formwork and frame support mounting, steel bar binding mounting, outer side formwork mounting, oval steel pipe mounting, wall concrete pouring, oval steel pipe dismounting, formwork and reinforcing component dismounting, and wall cleaning and maintaining. According to the provided easy-dismounting type inner formwork of the longand narrow deformation joint of the double shear wall and the construction method, the technical problem that in formwork construction of the long and narrow deformation joint of the double shear wall, formwork dismounting is difficult can be solved, the structural characteristics of the oval steel pipe are utilized, a specially-made oval steel pipe rotary jacking formwork dismounting device is adopted, a multifunctional hoisting device for cleaning and maintaining the inner wall face of the deformation joint is adopted, the formworks and operation tools are optimized, construction operationis convenient, fast and efficient, and remarkable technical and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of foundation engineering construction, in particular to the installation and construction of narrow and long deformation joints in double shear walls of cast-in-place concrete structures. Background technique [0002] With the development of science and technology, high-rise and super high-rise structures are more and more widely used in industrial and civil buildings. Shear wall and frame shear wall structures are widely used in high-rise structures. Deformation joints are set between shear walls. It is also very common in high-rise structures. The spacing between deformation joints (seismic joints, settlement joints, and expansion joints) is generally 200 to 500 mm, and the spacing between deformation joints in double shear walls is even narrower. Therefore, the support and removal of formwork on both sides of deformation joints often have certain limitations during structural construction. Construction ...

AI Technical Summary

Problems solved by technology

The spacing between deformation joints (seismic joints, settlement joints, and expansion joints) is generally 200 to 500 mm, and the spacing between deformation joints in double shear walls is even narrower. Therefore, the support and removal of formwork on both sides of deformation joints often have certain limitations during structural construction. construction difficulty

[0003] Due to the narrow space for construction operations at the deformation joints, it does not meet the construction conditions of the conventional loose formwork support method, nor does it meet the continuous construction requirements of the sliding formwork

If the extruded polystyrene board sandwich technology is used, it is difficult to fix and easy to move, and the steel protective layer pads are easily displaced, which makes it difficult to control the pouring and forming protective layer, the cross-sectional size of the wall, and the single-sided support formwork system. Reinforcement, high probability of axis displacement and mold expansion, at the same time, benzene board foam scraps are easy to be generated during operation, which is difficult to clean, and wastes materials and increases costs

If the wooden formwork construction method is used, workers cannot enter the deformation joints to install and remove the formwork during construction. After the shear walls on both sides are constructed, the formwork can only be discarded in the deformation joints, which will restrict the deformation performance of the structure itself, and then affect the entire structure. safety performance

[0004] Therefore, conventional construction methods have not yet solved the technical problems of difficulty in disassembling formwork for deformation joints in double shear walls, difficulty in controlling the size of deformation joints, and difficulty in ensuring the quality of concrete pouring at deformation joints

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