Face Stability Analysis of Tunnels with Consideration of the Influence of Excess Pore Pressures

Abstract

Abstract:

Abstract： During the earth pressure balance (EPB) shield tunneling, face stability is very important for controlling the impact on the environment. Field measurement was used to study the development and distribution of the excess pore pressure and earth pressure increment. Based on the monitored data, the fluidsolid coupling numerical model was used to analyze the face stability of tunnels with consideration of the influence of excess pore pressures in loading and unloading conditions. Subsequently, parametric analysis was executed to study the influence of the soil permeability coefficient and shield stopping time on face stability.

Key words: earth pressure balance (EPB) shield, face stability, excess pore pressure, shield stopping time

CLC Number:

TU 447

HOU Yongmao. Face Stability Analysis of Tunnels with Consideration of the Influence of Excess Pore Pressures[J]. Journal of Shanghai Jiaotong University, 2015, 49(07): 973-976.

References

［1］Anagnostou G, Kovari K. The face stabiity of slurry shield driving tunnels［J］. Tunnelling and Underground Space Technology, 1994, 9(2): 165174.

［2］Anagnostou G, Kovari K. Face stability conditions with earthpressurebalanced shields［J］. Tunnelling and Underground Space Technology, 1996, 11(2): 165173.

［3］魏纲, 贺峰. 砂性土中顶管开挖面最小支护压力的计算［J］. 地下空间与工程学报, 2007, 3(5): 903908.

WEI Gang, HE Feng. Calculation of minimal support pressure acting on shield face during pipe jacking in sandy soil［J］. Chienese Journal of Underground Space and Engineering, 2007, 3(5): 903908.

［4］乔金丽, 张义同, 高健. 考虑渗流的多层土盾构隧道开挖面稳定性分析［J］. 岩土力学, 2010, 31(5): 14971502.

QIAO Jinli, ZHANG Yitong, GAO Jian. Stability analysis of shield tunnel face in multilayer soil with seepage［J］. Rock and Soil Mechanics, 2010, 31(5): 14971502.

［5］Atkinson J H, Potts D M. Stability of a shallow circular tunnel in cohesionless soil［J］. Geotechnique, 1997, 27(2): 203215.

［6］Li Y, Emeriault F, Kastner R, et al. Stability analysis of large slurry shielddriven tunnel in soft clay［J］. Tunnelling and Underground Space Technology, 2009, 24: 472481.

［7］黄正荣, 朱伟, 梁精华, 等. 盾构法隧道开挖面极限支护压力研究［J］. 土木工程学报, 2006, 39(10): 112116.

HUANG Zhengrong, ZHU Wei, LIANG Jinghua, et al. A study on the limit support pressure at excavation face of shield tunneling［J］. China Civil Engineering Journal, 2006, 39(10): 112116.

［8］朱伟, 秦建设, 卢廷浩. 砂土中盾构开挖面变形与破坏数值模拟研究［J］. 岩土工程学报, 2005, 27(8): 897902.

ZHU Wei, QIN Jianshe, LU Tinghao. Numerical study on face movement and collapse around shield tunnels in sand［J］. Chinese Jounal of Geotechnical Engineering, 2005, 27(8): 897902.

［9］方勇, 何川. 土压平衡式盾构掘削面支护压力特性分析［J］. 岩土力学, 2009, 30(11): 35283532.

FANG Yong, HE Chuan. Analysis of cutting face support pressure for earth pressure balance shield tunneling ［J］. Rock and Soil Mechanics, 2009, 30(11): 35283532.

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