A pipe jacking machine and a returnable pipe jacking construction method

Abstract

A pipe jacking machine includes a cutter head fixedly connected to the inner housing and capable of entering the central cavity, and a folding cutter holder having a first end hinged to the cutter head and a second end foldable about the first end into the central cavity. The cutter head includes an outer housing and an inner housing, and a cutter assembly and a retractor fixedly connected to theinner housing at an end remote from the cutter assembly. The cutting area of the folding cutter holder is free from the influence of the shell, and can avoid manual overturning, which is favorable forimproving the tunneling efficiency and realizing automatic retraction. In addition, the inner shell is dragged by the back dragging device so that the inner shell drives the cutter assembly to be dragged from the central cavity of the outer shell into the originating well, thereby avoiding manual disassembly of the connection between the outer shell and the inner shell and facilitating further automatic retraction. Therefore, the pipe jacking machine provided by the invention is not only conducive to improving the tunneling efficiency, but also conducive to realizing automatic retraction. Theinvention also discloses a returnable pipe jacking construction method applied to the pipe jacking machine as described above.

Description

technical field [0001] The invention relates to the technical field of engineering equipment, in particular to a pipe jacking machine. The invention also relates to a retractable pipe jacking construction method. Background technique [0002] On the one hand, the development of underground space has gradually become necessary due to environmental damage, traffic congestion, and large land occupation caused by the rapid urban development; Serious impacts on life and ground transportation have drawn increasing attention to civilized construction. Naturally, the construction of pipe jacking machines has been widely used in tunnel excavation, municipal drainage, communication cables, gas pipelines, power cables and other fields due to its advantages such as small impact on the construction surroundings, construction through obstacles, wide range of adaptability to soil quality, and strong crushing capacity. . [0003] A pipe jacking machine usually includes a cutter head, a c...

AI Technical Summary

Problems solved by technology

[0005] However, on the one hand, because the cutting surface of the cutterhead is affected by the inner cavity of the shell, the cutting area of ​​the cutterhead is limited, thereby affecting the improvement of tunneling efficiency; Manually dismantling the connecting parts between the outer shell and the inner shell, the work intensity is high, which makes it inconvenient for the pipe jacking machine to roll back, which is not conducive to automatic rollback

[0006] Therefore, the existing pipe jacking machine is not only not conducive to improving the excavation efficiency, but also not conducive to the realization of automatic retraction

Images