顶部导洞法TBM卡机脱困技术研究与应用

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Abstract Research purposes: TBM has been widely used in the field of underground engineering construction in China, but for complex geological conditions, the problem of TBM jamming is still very prominent. During construction, it has encountered difficulties in varying degrees such as continuous jamming, long-term jamming, water and mud inrush, equipment scrapping and construction method change, which not only delayed the construction period, but also greatly increased the project construction cost. Therefore, it is very necessary to study the prevention and control technology of TBM jamming under complex geological conditions and the safe and rapid escape technology after TBM jamming. Gaoligongshan Tunnel is 34 538 m in length. The inlet is constructed by drilling and blasting method, and the outlet is constructed by TBM method. During TBM construction, tunneling is relatively smooth under general geological conditions, but when the complex geological conditions such as the fault fracture zone, lithologic contact zone, joint dense belt, weathering alteration belt and soft rock extrusion zone are encountered, there are still 19 times jamming accident including 8 positive holes and 11 flat guide, seriously affecting the normal TBM tunneling, especially serious jamming, the conventional methods are difficult to be effective, so it is necessary to study safe and effective techniques to ensure the normal tunneling of TBM.
Research conclusions:(1) The top pilot tunnel method is an effective way to deal with TBM jamming. (2) When the top pilot tunnel method is used to deal with TBM jamming, the headroom width of the pilot tunnel should be 120 cm and the headroom height should be 130 cm. The pipe shed workshop should be set within 120° of the arch. The pipe shed should have a diameter of 76 mm, a circumferential spacing of 40 cm, an elevation of 1 ° ~ 3 °, and the length should pass through the fracture zone in front of the tunnel at one time. (3) The research results can be popularized and applied in TBM construction of similar tunnels.

Key words： tunnel TBM jamming top pilot tunnel method extricate oneself from difficulties research application

Received: 30 September 2021

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U25

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	Articles by authors
	ZHANG Minqing
	XIN Weike
	JIA Dapeng
	SI Jingzhao
	WANG Huanlong

Cite this article:

ZHANG Minqing,XIN Weike,JIA Dapeng, et al. Research and Application of Top Pilot Tunnel Method Rescue Technology in TBM Jamming[J]. Journal of Railway Engineering Society, 2023, 40(1): 68-75.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2023/V40/I1/68

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