Rectangular pipe jacking large-angle obliquely crossing in-tunnel construction method

Abstract

The invention provides a rectangular pipe jacking large-angle obliquely crossing in-tunnel construction method, which comprises the following steps that: a pipe jacking machine performs inclined tunneling to a position in front of a work well; the work well is fully filled with backfilling soil; the pipe jacking machine is slantwise pushed into the work well and forms a jacking-in section; the backfilling soil in the work well is dug away until the jacking-in section is completely exposed; the jacking-in section is dismounted and is hung out from the work well; a breast board is complementally welded in a jacking-in section cutting position on the pipe jacking machine; the steps after the operation of pushing the pipe jacking machine into the work well are repeated until a case of the pipe jacking machine completely enters the work well; and a rest part of the case of the pipe jacking machine is connected with the work well for completing the passage breakthrough. The method provided by the invention solves the problem of pipe jacking large-angle obliquely crossing in-tunnel construction, and successfully realizes the passage breakthrough.

Description

Technical field [0001] The invention relates to a method for pipe jacking into a tunnel, in particular to a construction method for a rectangular pipe jacking to enter a tunnel at a large angle. Background technique [0002] In the construction of urban underground projects, rectangular pipe jacking is widely used, such as subway station entrances and exits, underground passages, etc. The construction of this kind of project needs to have one working well for pipe jacking (namely starting well) and one working well for pipe jacking (namely receiving well). Generally, in engineering design, the launch well and the receiving well are perpendicular to the pipe jacking axis and meet the size requirements of the pipe jacking for normal launch and arrival. [0003] However, with the large-scale development of urban construction and increasing traffic pressure, under certain circumstances, such as surrounding buildings, busy roads, and important underground pipelines, construction sites ...

AI Technical Summary

Problems solved by technology

[0003] However, with the large-scale development of urban construction and the increasing traffic pressure, in some specific environments, such as surrounding buildings, busy roads, important underground pipelines, etc., the construction site is more and more affected by the surrounding environment Therefore, it is impossible to set the usual receiving well, and it is very likely that the receiving well is not perpendicular to the axis of pipe jacking, and the size of the receiving well is much smaller than the size required for normal construction.

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