Influence of existing shield tunnels on the stability of adjacent slurry trench

Zhihe Liu; Chunbai Zhu; Nianwu Liu; Zhi Ding

doi:10.1117/12.2619699

9 December 2021 Influence of existing shield tunnels on the stability of adjacent slurry trench

Zhihe Liu, Chunbai Zhu, Nianwu Liu, Zhi Ding

Proceedings Volume 12030, Third International Conference on Optoelectronic Science and Materials (ICOSM 2021); 120301F (2021) https://doi.org/10.1117/12.2619699
Event: Third International Conference on Optoelectronic Science and Materials (ICOSM 2021), 2021, Hefei, China

Abstract

Stress state of soil in the trench wall will be influenced when the trench excavation is adjacent to the existing shield tunnel, which will affect the stability of the slurry trench. In this paper, 2D limit analysis of slurry trench stability was performed to investigate the influence on the existing shield tunnels on the stability of adjacent slurry trench. The influence mechanism of the existing tunnel was analysed. The safety factor of the slurry trench under different conditions were compared. Existing shield tunnel will decrease the stability of the slurry trench. The safety factors of the trench increases with the increasing the tunnel spacing and it would be gradually improved with the increase of the reinforcement depth and the shear strength of the reinforced mixing pile.

Citation Download Citation

Zhihe Liu, Chunbai Zhu, Nianwu Liu, and Zhi Ding "Influence of existing shield tunnels on the stability of adjacent slurry trench", Proc. SPIE 12030, Third International Conference on Optoelectronic Science and Materials (ICOSM 2021), 120301F (9 December 2021); https://doi.org/10.1117/12.2619699

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