Risk Analysis on the Accident of TBM’s Cutterhead Jamming Caused by Collapse of Tunnel

Abstract:

If TBM does the excavating work in jointed rock mass, the cutterhead may be jammed. In order to decrease the loss, it is necessary to carry out risk evaluation. Whether the cutterhead is jammed or not depends on the relationship between torque and resistance torque. The magnitude of resistance torque depends on height of collapse, so according to the randomicity of height of collapse and probability theory, a formula for calculating the probability of cutterhead jamming is established. Meanwhile, according to the magnitude of resistance torque and cutterhead’s parameters, consequence of cutterhead jamming is divided into five ranks. Based on probability and consequence ranks, risk evaluation matrix for TBM’s cutterhead is proposed. The research results are demonstrated logically by the calculation of practical engineering.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 2246-2250
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.2246
• Online since: January 2012
• Authors: Sen Wen, Han Zhou Liu, Li Min Zhao
• Keywords: Resistance Torque, Risk Analysis, Risk Evaluation Matrix, TBM’s Cutterhead, Tunnel

References

[1] Bo Liu: submitted to SHANG XI Hydro Technics(2007) (in Chinese) .

[2] Tiantian Song， Zhengxue Xiao, Huayou Su，et al: submitted to Chinese Journal of Rock Mechanics and Engineering(2004) (in Chinese) .

[3] Yanjun Shang, Yongyue Shi, Qingli,Zeng, et al :submitted to Chinese Journal of Rock Mechanics and Engineering(2005) (in Chinese) .

[4] E. Hoek, E. T. Brown: submitted to International Journal of Rock Mechanics and Mining Sciences(1997).

[5] E.Farrokh, A.Mortazavi; G. Shamsi: submitted to Tunnelling and Underground Space Technology(2006).

[6] Sen Wen, Weiya Xu: submitted to Journal of Yangtze River Scientific Research Institute(2008) (in Chinese) .

[7] Dihou Zhao: submitted to Shan Xi Hydrotechnics(2008) (in Chinese) .

[8] Meifeng Cai, Manchao He, Dongyan Liu. Rock Mechanics and Engineering. (Science press, China 2002)(in Chinese)

[9] E.Farrokh, J. Rostami: submitted to Tunnelling and Underground Space Technology(2008)