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Development and Application of TBM-mounted Omni-directional and Normal Deep Anchor Hole Drilling Machine
(1. China Railway 18th Bureau Group Co., Ltd., Tianjin 300222; 2. Qilu Transportation College, Shandong University, Jinan 250061;3. China Railway Southwest Research Institute Co., Ltd., Chengdu 611731; 4. China Railway Academy Group Co., Ltd.,Chengdu 610031; 5. Tunnel Engineering Company of China Railway 18th Bureau Group, Chongqing 400700)
Abstract To address TBM jamming caused by large deformation in high-stress soft rock tunnels, this study takes the Xinjiang XEⅢ project as a case to analyze the primary causes of TBM jamming accidents. The results clearly indicate that soft rock deformation is the main factor delaying the construction progress of the remaining 2.3 km section. Accordingly, a comprehensive technical solution of omni-directional and normal anchoring with long, rapid and strong features behind the TBM cutterhead is proposed, and a TBM-mounted omni-directional and normal deep anchor hole drilling machine is developed. The equipment incorporates a swing arm-feeding beam linkage adjustment mechanism (angle adjustment accuracy ±0.5°) and a compact drill rod clamp module (50% volume reduction),enabling 360° normal drilling of system deep anchor holes (8-12 m depth) within a confined 2.4 m annular space.The modular rod connection technology improves drilling efficiency to 1 m/min. Field applications demonstrate that this technology can achieve omni-directional and normal deep anchor hole drilling under TBM working conditions,reducing the anchoring cycle from 800 min/ring to 300 min/ring.
Abstract：
To address TBM jamming caused by large deformation in high-stress soft rock tunnels, this study takes the Xinjiang XEⅢ project as a case to analyze the primary causes of TBM jamming accidents. The results clearly indicate that soft rock deformation is the main factor delaying the construction progress of the remaining 2.3 km section. Accordingly, a comprehensive technical solution of omni-directional and normal anchoring with long, rapid and strong features behind the TBM cutterhead is proposed, and a TBM-mounted omni-directional and normal deep anchor hole drilling machine is developed. The equipment incorporates a swing arm-feeding beam linkage adjustment mechanism (angle adjustment accuracy ±0.5°) and a compact drill rod clamp module (50% volume reduction),enabling 360° normal drilling of system deep anchor holes (8-12 m depth) within a confined 2.4 m annular space.The modular rod connection technology improves drilling efficiency to 1 m/min. Field applications demonstrate that this technology can achieve omni-directional and normal deep anchor hole drilling under TBM working conditions,reducing the anchoring cycle from 800 min/ring to 300 min/ring.
WANG Lichuan1,
2 YAN Guangtian1 YUAN Wei GAO Hongbing4 LI Liping2 ZHANG Chunyu1,
5 WU Jian4 ZHANG Long3
.Development and Application of TBM-mounted Omni-directional and Normal Deep Anchor Hole Drilling Machine[J] MODERN TUNNELLING TECHNOLOGY, 2025,V62(3): 67-74
2025, Vol. 62 