Tunneling Technology of Three-Mode
Tunnel Boring Machine&nbsp;Under TBM Mode in Full-Section Hard Rock

XIE Wenda; LIANG Hongbing; CHEN Qiaosong; GUO Yongshun; MA Jingzhe

doi:10.3973/j.issn.2096-4498.2024.03.017

Tunnel Construction >

2024 , Vol. 44 >Issue 3: 596 - 604

DOI: https://doi.org/10.3973/j.issn.2096-4498.2024.03.017

Tunneling Technology of Three-Mode Tunnel Boring Machine Under TBM Mode in Full-Section Hard Rock

XIE Wenda ,
LIANG Hongbing ,
CHEN Qiaosong ,
GUO Yongshun ,
MA Jingzhe

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(1. Guangzhou Metro Engineering Consulting Co., Ltd., Guangzhou 510010, Guangdong, China; 2. Guangzhou Metro Construction Management Co., Ltd., Guangzhou 510330, Guangdong, China; 3. The 3rd Engineering Co., Ltd. of China Railway Tunnel Group, Guangzhou 510530, Guangdong, China)

Online published: 2024-04-28

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Abstract

In this study, a detailed analysis is conducted on the shield section project from Luogang station to Shuixi station of the Phase Ⅱ of the Guangzhou metro line 7. The tunneling technology employed by the threemode tunnel boring machine in fullsection hard rock under TBM mode is examined. Furthermore, various aspects, including mucking mode, driving parameter control, cutter management, and stabilizer application, are evaluated. Results reveal the following key points: (1) Using toothed disc cutters in the threemode tunnel boring machine results in lower cutter consumption compared to smooth disc cutters, accompanied by reduced cutterhead torque. (2) The implementation of mud circulation and doublechannel mucking via screw conveyors substantially minimizes mud pipe blockage issues and enhances mucking efficiency. (3) Strategically positioned stabilizers and grippers on the front and middle shields, respectively, ensure shield body stability during boring operations in hard rock strata. (4) Optimal operation parameters for tunneling in fullsection hard rock strata include a cutterhead rotation speed of 3.0 r/min, total thrust force of 15 000 kN, thrust speed of 1 300 kN·m, and torque of 8－12 mm/min.

Key words： rail transit; three-mode tunnel boring machine; hard rock section; tunneling efficiency; fullsection rock stratum

Cite this article

XIE Wenda , LIANG Hongbing , CHEN Qiaosong , GUO Yongshun , MA Jingzhe .

Tunneling Technology of Three-Mode Tunnel Boring Machine Under TBM Mode in Full-Section Hard Rock

[J]. Tunnel Construction, 2024 , 44(3) : 596 -604 . DOI: 10.3973/j.issn.2096-4498.2024.03.017

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