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LÜ Xi-lin, ZENG Sheng, WANG Yuan-peng, MA Shao-kun, HUANG Mao-song. Physical model tests on stability of shield tunnel face in saturated gravel stratum[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 129-132. DOI: 10.11779/CJGE2019S2033
Citation: LÜ Xi-lin, ZENG Sheng, WANG Yuan-peng, MA Shao-kun, HUANG Mao-song. Physical model tests on stability of shield tunnel face in saturated gravel stratum[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 129-132. DOI: 10.11779/CJGE2019S2033

Physical model tests on stability of shield tunnel face in saturated gravel stratum

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  • Received Date: April 29, 2019
  • Published Date: July 19, 2019
  • To detect the stability of tunnel face with different depth in saturated gravel stratum, three reduced scale model tests were conducted, and the progressive failure process under insufficient support pressure was explored. According to the particle analysis, loosens of particle contact and the initiation and closure of crack were investigated, the results indicate that delayed deformation occurs and it can be weakened by decreasing the tunnel depth. Based on the PIV analysis, the failure mode of tunnel face is obtained, it shows a combination mode of a sliding wedge and an overlying silo, and the inclination of sliding wedge is about 45°+φ/2. Due to the delayed deformation of soil in silo, a sudden collapse mode of tunnel face may occur. In order to produce a precise prediction of limit support pressure, a modified wedge model is proposed, and the obtained results compare well with test results.
  • [1]
    HE C, FENG K, FANG Y, et al.Surface settlement caused by twin-parallel shield tunnelling in sandy cobble strata[J]. Journal of Zhejiang University-Science A: Applied Physics & Engineering, 2012, 13(11): 858-869.
    [2]
    江英超, 方勇, 何川, 等. 砂卵石地层盾构施工滞后沉降形成的细观研究[J]. 地下空间与工程学报, 2015, 11(1): 171-177.
    (JIANG Ying-chao, FANG Yong, HE Chuan, et al.Study on delayed settlement formation induced by shield tunneling in sandy cobble strata[J]. Chinese Journal of Underground Space and Engineering, 2015, 11(1) : 171-177. (in Chinese))
    [3]
    谢雄耀, 王强, 刘欢, 等. 富水圆砾地层盾构下穿火车站股道沉降控制技术研究[J]. 岩石力学与工程学报, 2016, 35(2): 3960-3970.
    (XIE Xiong-yao, WANG Qiang, LIU Huan, et al.Settlement control study of shield tunnelling crossing railway station in round gravel strata[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(2): 3960-3970. (in Chinese)).
    [4]
    王明年, 魏龙海, 路军富, 等. 成都地铁卵石层中盾构施工开挖面稳定性研究[J]. 岩土力学, 2011, 32(1): 99-105.
    (WANG Ming-nian, WEI Long-hai, LU Jun-fu, et al.Study of face stability of cobble-soil shield tunnelling at Chengdu metro[J]. Rock and Soil Mechanics, 2011, 32(1): 99-105. (in Chinese))
    [5]
    吕玺琳, 李冯缔, 黄茂松, 等. 三维盾构隧道开挖面极限支护压力数值及理论解[J]. 同济大学学报 (自然科学版), 2012, 40(10): 1469-1473.
    (LÜ Xi-lin, LI Feng-di, HUANG Mao-song, et al.Three-dimensional numerical and analytical solutions of limit support pressure at shield tunnel face[J]. Journal of Tongji University (Natural Science), 2012, 40(10): 1469-1473. (in Chinese))
    [6]
    唐开顺, 谢雄耀, 杨磊. 圆砾土大型三轴试验力学特性研究[J]. 地下空间与工程学报, 2014, 10(3): 580-585.
    (TANG Kai-shun, XIE Xiong-yao, YANG Lei.Research on mechanical characteristics of gravel soil based on large-scale triaxial tests[J]. Chinese Journal of Underground Space and Engineering, 2014, 10(3): 580-585. (in Chinese))
    [7]
    LÜ X L, ZHOU Y C, HUANG M S, et al.Experimental study of the face stability of shield tunnel in sands under seepage condition[J]. Tunnelling and Underground Space Technology, 2018, 74: 195-205.

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