Pre-embedded components and usage for improving longitudinal overall rigidity after rectangular pipe jacking

Abstract

The invention discloses an embedding component for increasing the post-construction longitudinal overall rigidity of a rectangular top pipe and an application method of the embedding component. The embedding component comprises mud-jacking pipes, wherein each mud-jacking pipe is connected with a prestress duct through a connecting pipe, each prestress duct is a pipeline embedded in the wall of the rectangular top pipe along the length direction, one end of each prestress duct is a small positioning tenon, the other end of each prestress duct is a large positioning tenon, each small positioning tenon extends out the pipe joint end of the rectangular top pipe for more than 40mm, the tail end of each large positioning tenon is parallel with the pipe joint end of the rectangular top pipe, the inner diameter of the large positioning tenon is slightly larger than the outer diameter of the small positioning tenon, a detachable grouting pipe sleeve is mounted in a pipeline, communicated with an outer wall, of each mud-jacking pipe, and each grouting pipe sleeve can seal the outer wall opening of the corresponding mud-jacking pipe, and a passage between the inner wall opening of each mud-jacking pipe and the corresponding pipe is reserved. By the embedding component which is simple in structure and high in construction operability, the post-construction pipe joint overall longitudinal rigidity can be increased evidently.

Description

technical field [0001] The invention relates to a pre-embedded assembly for improving the longitudinal overall rigidity after rectangular pipe jacking and its usage, and belongs to the technical field of underground structure engineering construction. Background technique [0002] Rectangular pipe jacking is a non-excavation construction technology gradually developed on the basis of circular pipe jacking. It uses hydraulic cylinders to move the pipe jacking machine and The pipe joints are jacked into the ground one by one until the trenchless underground pipeline laying construction process of the receiving well. Compared with the circular section, the effective use area of ​​the rectangular pipe jacking can not only be increased by more than 20%, but also the planning and utilization of the channel space is more convenient, and it can also reduce the amount of underground excavation. At present, it is widely used in municipal engineering in our country. application. At p...

AI Technical Summary

Problems solved by technology

This invention solves the technical problem that the joint will loosen after the jacking force of the pipe joint is removed, but it is only suitable for improving the connection stiffness between local adjacent pipe joints, and cannot solve the problem of the overall stiffness reduction of all pipe joints caused by external forces

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