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Volume 37 Issue 5
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LI Zhong-chao, CHEN Ren-peng, CHEN Yun-min, RAO Meng. Factor of safety of a braced deep excavation in soft clay[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(5): 769-775. DOI: 10.11779/CJGE201505001
Citation: LI Zhong-chao, CHEN Ren-peng, CHEN Yun-min, RAO Meng. Factor of safety of a braced deep excavation in soft clay[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(5): 769-775. DOI: 10.11779/CJGE201505001
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Factor of safety of a braced deep excavation in soft clay

  • 1. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou 310027, China; 2. East China Construction Engineering Corporation of Zhejiang, Hangzhou 310030, China

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  • Received Date: April 21, 2014
  • Published Date: May 19, 2015
    Graphical Abstract
    • Abstract
  • The factor of safety (FS) is a very important design index for deep excavation in soft clay. The existing methods for FS mainly include the conventional methods and finite element method (FEM) based on the reduced shear strength technique. In this study, the conventional methods and reduced shear strength FEM are used for FS evaluation of a failed deep excavation in soft clay. By comparing the values of FS of the excavation using different soil strength parameters and methods, the applicability of the analysis methods and soil strength parameters is evaluated. The research results indicate that the values of FS of the excavation calculated by the conventional methods and the reduced shear strength FEM using the total stress indexes, i.e., su, =0, are very close to 1.0 and those from Terzaghi’s method, while the values of FS of the excavation are much greater than 1.0 using the soil strength parameters c and from triaxial tests. When the reduced shear strength FEM is applied for FS evaluation, the values of FS obtained from the convergence criterion method are much greater than those from the intersection method. The values of FS of the excavations using the intersection method and Terzaghi’s method are both very close to 1.0, which is consistent with the limited equilibrium state of the excavations at failure.
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    • References (25)
  • [1]
    MAGNUS R, TEH C I, LAU J M. Report of the committee of inquiry into the incident at the MRT circle line worksite that led to the collapse of Nicoll Highway on 20 April 2004[R]. Singapore: Subordinate Courts, 2004.
    [2]
    TANG Y, WEI B. Performance of an over excavated metro station and facilities nearby[J]. Journal of Performance of Constructed Facilities, 2012, 26(3): 241-254.
    [3]
    GB50007—2011 建筑地基基础设计规范[S]. 2011. (GB50007—2011 Code for design of building foundation[S]. 2011. (in Chinese))
    [4]
    JGJ 120—2012 建筑基坑支护技术规程[S]. 2012. (JGJ 120—2012 Technical specification for retaining and protection of building foundation excavations[S]. 2012. (in Chinese))
    [5]
    TERZAGHI K. Theoretical soil mechanics[M]. New York: John Wiley & Sons, 1943.
    [6]
    BJERRUM L, EIDE O. Stability of strutted excavations in clay[J]. Géotechnique, 1956, 6(1): 32-47.
    [7]
    BISHOP A W. The use of the slip circle in the stability of slopes[J]. Géotechnique, 1955, 5(1): 7-17.
    [8]
    ZIENKIEWICZ O C, HUMPHESON C, LEWIS R W. Associated and non-associated visco-plasticity and plasticity in soil mechanics[J]. Géotechnique, 1975, 25(4): 671-689.
    [9]
    GRIFFITHS D V, LANE P A. Slope stability analysis by finite elements[J]. Géotechnique, 1999, 49(3): 387-403.
    [10]
    DAWSON E M, ROTH W H, DRESCHER A. Slope stability analysis by strength reduction[J]. Géotechnique, 1999, 49(6): 835-840.
    [11]
    赵尚毅, 郑颖人, 时卫民. 用有限元强度折减法求边坡稳定安全系数[J]. 岩土工程学报, 2002, 24(3): 343-346. (ZHAO Shang-yi, ZHENG Ying-ren, SHI Wei-ming. Slope safety factor analysis by strength reduction FEM[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(3): 343-346. (in Chinese))
    [12]
    赵尚毅, 郑颖人, 张玉芳. 极限分析有限元法讲座——II有限元强度折减法中边坡失稳的判据探讨[J]. 岩土力学, 2005, 26(2): 332-336. (ZHAO Shang-yi, ZHENG Ying-ren, ZHANG Yu-fang. Study on slope failure criterion in strength reduction finite element method[J]. Rock and Soil Mechanics, 2005, 26(2): 332-336. (in Chinese))
    [13]
    BRINKGREVE R, KHOURY R A, BAKKER K J, et al. Plaxis 2D version 8 manual[M]. Rotterdam: Balkema A A, 2002.
    [14]
    CAI F, UGAI K, TOSHIYUKI H. Base stability of circular excavations in soft clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2002, 128(8): 702-706.
    [15]
    FEHEEM H, CAI F, UGAI K. Three-dimensional base stability of rectangular excavations in soft soils using FEM[J]. Computers and Geotechnics, 2004, 31(1): 67-74.
    [16]
    陈福全, 吕艳平, 刘毓氚. 内撑式支护的软土基坑开挖抗隆起稳定性分析[J]. 岩土力学, 2008, 29(2): 365-369. (CHEN Fu-quan, LU Yan-ping, LIU Yu-chuan. Base stability of braced excavations in soft clays using FEM[J]. Rock and Soil Mechanics, 2008, 29(2): 365-369. (in Chinese))
    [17]
    张旷成, 李继民. 杭州地铁湘湖站“08.11.15”基坑坍塌事故分析[J]. 岩土工程学报, 2010, 32(增刊1): 338-342. (ZHANG Kuang-cheng, LI Ji-min. Accident analysis for“08.11.15”foundation pit collapse of Xianghu Station of Hangzhou metro[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(S1): 338-342. (in Chinese))
    [18]
    CHEN R P, LI Z C, CHEN Y M, et al. Failure investigation at a collapsed deep excavation in very sensitive organic soft clay[J]. Journal of Performance of Constructed Facilities, 2013, ASCE, (Accepted, http://dx.doi.org/10.1061/(ASCE)CF. 1943-5509.0000557).
    [19]
    GONG X N, ZHANG X C. Excavation collapse of Hangzhou subway station in soft clay and numerical investigation based on orthogonal experiment method[J]. Journal of Zhejiang University (Science A), 2012, 13(10): 760-767.
    [20]
    浙江华东建设工程有限公司. 杭州地铁1号线湘湖站北二段基坑恢复方案岩土工程勘察专题报告[R]. 杭州: 浙江华东建设工程有限公司, 2008. (East China Constnution Engineering Corporation of Zhejiang. Geotechnical engineering investigation report of the reconstruction of Xianghu subway station of Hangzhou Metro Line 1[R]. Hangzhou: East China Constnution Engineering Corporation of Zhejiang, 2008. (in Chinese))
    [21]
    浙江大学土木工程测试中心. 杭州地铁1号线湘湖站土体检测报告[R]. 杭州: 浙江大学土木工程测试中心, 2008. (Civil Engineering Test Center of Zhejiang University. Testing report on the soils at the Xianghu subway station of Hangzhou Metro Line 1[R]. Hangzhou: Civil Engineering Test Center of Zhejiang University, 2008. (in Chinese))
    [22]
    MANA A I, CLOUGH G W. Prediction of movements for braced cut in clay[J]. Journal of Geotechnical Engineering Division, ASCE, 1981, 107(6): 759-777.
    [23]
    Department of the Navy, Naval Facilities Engineering Command, (NAVFAC). Foundation and earth structure, design manual 7.2[M]. Washington: US Department of Nary, 1982.
    [24]
    OU C Y. Deep excavation: theory and practice[M]. London: Taylor and Francis, 2006.
    [25]
    DO T N, OU C Y, LIM A. Evaluation of factors of safety against basal heave for deep excavations in soft clay using the finite element method[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2013, 139(12): 2125-2135.
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