Ultra-large full-face rectangular pipe jacking tunneling construction method

Abstract

The invention relates to an ultra-large full-face rectangular pipe jacking tunneling construction method, which comprises the following steps that: a tunnel line axial line is determined, and a launching shaft and a receiving shaft are set; a pipe jacking machine is arranged on a guide rail arranged in the launching shaft to be debugged; the pipe jacking machine performs tunneling along the tunnel line axial line, and pipe joints are spliced in the launching shaft; when the pipe jacking machine reaches the receiving shaft, the pipe joints are separated from the pipe jacking machine, and the tunnel breakthrough is realized; curing slurry is injected to pipe joint peripheries through slurry injecting holes formed in the pipe joints, and soil bodies around the tunnel are reinforced; and shaft joints are cast in connecting positions of structure lined walls and the pipe joints in the positions of the receiving shaft and the launching shaft. The ultra-large full-face rectangular pipe jacking tunneling construction method has the advantages that the hole entering and exiting and non-excavation tunneling construction of the pipe jacking machine is realized; the ultra-large full-face rectangular tunneling construction is realized; and the problems in a long-face long-distance and curve tunneling process in the conventional ultra-large full-face rectangular pipe jacking tunneling construction are solved.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a super-large full-section rectangular pipe jacking construction method, the net size of the tunneling passage is greater than 5m×8m, or the cutting area of ​​the tunneling is not less than 60m 2 , and the ultra-large section size of the excavation meets the functions of pedestrians and motor vehicles. Background technique [0002] Rectangular pipe jacking machines are used more and more in tunnel engineering. Compared with circular pipe jacking machines, they can effectively use space and reduce underground excavation earthwork. It is used for pedestrians, vehicles and other underground passages without the need for ground paving procedures, saving Time also reduces costs. At present, the existing earth pressure balance rectangular pipe jacking has a smaller rectangular cross-section and is mainly used in trenchless construction of subway pedestrian passages, high-voltage cabl...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned method of assembling small-sized rectangular roadheaders to fit large-sized tunnels does not belong to full-section construction. In actual use, the soil pressure of each rectangular roadheader is different, resulting in construction instability. Curved tunnel excavation construction is difficult to control, and construction quality and safety cannot be guaranteed

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