Post-tensioned prestressed fabricated underground diaphragm wall and installation and construction method

Abstract

The invention provides a post-tensioned prestressing assembly type underground continuous wall and an installation construction method, bundle penetrating holes are formed in prefabricated underground continuous wall bodies, the bundle penetrating holes of every two adjacent prefabricated underground continuous wall bodies are communicated with each other, fastening devices are arranged in the bundle penetrating holes, and each fastening device comprises a rebar bundle and a rotating anchor ring coaxially fixed to the end of the rebar bundle. A sliding block is arranged on the side wall of the rotating anchor ring in the axial direction and is in sliding connection with the inner wall of the bundle penetrating hole. When the end, connected with the steel bar bundle, of the rotary anchor ring slides down to the bottom of the last prefabricated underground continuous wall, the steel bar bundle is rotated to a preset angle, then the steel bar bundle is tensioned, and on one hand, concrete on the tensioned side of the underground continuous wall is subjected to pre-compressive stress through tensioning of the steel bar bundle, and certain compressive deformation is generated. After the wall body structure is stressed, concrete on the pulled side firstly counteracts previous compression deformation, the use amount of reinforced concrete is reduced, on the other hand, the sliding block is connected with the prefabricated underground continuous wall body in a buckled mode, and the strength of the underground continuous wall is effectively improved.

Description

technical field [0001] The invention relates to the technical field of underground diaphragm walls, in particular to a post-tensioned prestressed assembled underground diaphragm wall and an installation and construction method. Background technique [0002] At present, with the continuous expansion of the scale of underground engineering construction in my country, large-scale foundation pits continue to appear, the excavation depth of foundation pits continues to increase, the surrounding environment of foundation pits is becoming more and more complex, and the requirements for foundation pit enclosure structures are becoming more stringent. The underground diaphragm wall enclosure structure is considered to be one of the best enclosure structures in deep foundation pit engineering and has been widely used. Most of the underground diaphragm walls in the project are cast-in-situ. In some special strata and complex construction environments, it is difficult to control the pou...

AI Technical Summary

Problems solved by technology

However, in the process of assembling the underground diaphragm wall, it is difficult to guarantee the strength of the wall at the joint position, and there is also the problem of water leakage

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