Narrow and long deformation joints and construction methods of double shear walls

Abstract

The invention relates to a narrow and long deformation joint of a double shear wall and a construction method. The structure mainly includes: an inner formwork, an outer formwork, a corrugated back, a frame support, an elliptical steel pipe, a pull screw, and a shelving platform plate. The main construction steps include: formwork making and Splicing; installation of shelving platform; installation of inner formwork and frame support; installation of steel bar binding; installation of outer formwork; installation of oval steel pipe; concrete pouring of wall; removal of oval steel pipe; removal of formwork and reinforcement components; The easy-to-detachable inner formwork and construction method for the narrow and long deformation joints of the double shear wall proposed by the present invention can solve the technical problem of difficult installation and disassembly of the formwork in the formwork construction of the narrow and long deformation joints of the double shear wall. The formwork removal device for the elliptical steel pipe rotating roof, the multi-functional hanging device for cleaning and maintaining the inner wall of the deformation joint, the optimized formwork and working tools, the construction operation is convenient and efficient, and has significant technical and economic benefits.

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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