Response characteristics of surrounding rock and segment structure of large longitudinal slope tunnel
DOI:
https://doi.org/10.56748/ejse.24552Keywords:
Tunnel engineering, Large longitudinal slope tunnel, Numerical simulation, Fracture zone, TBM construction methodAbstract
To provide reference and guidance for ensuring the safe construction of tunnel construction, taking a mountain road tunnel project as the background, the finite element numerical simulation method is used to study the excavation of large longitudinal slope tunnel by TBM method. The vertical displacement of surrounding rock shows the deformation trend of vault subsidence and arch bottom uplift, and the peak value of lateral displacement decreases gradually with the increase of longitudinal slope gradient. The segment at the vault and arch bottom of the tunnel are subjected to positive bending moment, and the spandrel arch waist and arch foot are subjected to negative bending moment. The maximum value of the absolute value of the axial force is located at the arch waist. In addition, the deformation characteristics of the surrounding rock and the stress characteristics of the segment during the tunnel crossing the fault fracture zone are analyzed. The research shows that the vertical displacement of the surrounding rock is significantly larger than that of the intact stratum, and the closer to the fault fracture zone, the larger the vertical deformation is, and the closer to the tunnel entrance section, the larger the uplift deformation is. The horizontal displacement of the surrounding rock is obviously smaller before it enters the fault fracture zone, and the displacement increases rapidly when it is constructed to the fault range and reaches the peak at the center of the fault. After crossing the fault, the displacement changes little.
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CHEN Weizhong,XIAO Zhenglong,TIAN Hongming.Research on extrusion large deformation of deeply buried high geostress TBM tunnel and its control technology[J].Journal of Rock Mechanics and Engineering,2015,34(11): 2215-2226.DOI:10.13722/j.cnki.jrme.2015.1000
Cheng J L,Yang S Q,Du L K,et al.Three-dimensional numerical simulation on interaction between double-shield TBM and surrounding rock mass in composite ground[J].Chinese Journal of Rock Mechanics and Engineering,2016,35(3): 511-523.DOI:10.13722/j.cnki.jrme.2015.0693
Fan Min,Li Yuanfu.Research on emergency rescue design of high-speed railroad tunnels in difficult and dangerous mountainous areas[J].Railway Standard Design,2012(10): 66-68+72.DOI:10.13238/j.issn.1004-2954.2012.10.029
Feng Huanhuan,Hong Kairong,Yang Yandong,et al.Research and application of key technology of TBM tunnel construction under extremely complex geological conditions[J].Modern Tunneling Technology,2022,59(01): 42-54.DOI:10.13807/j.cnki.mtt.2022.01.005
Hou Gongyu,Yang Yue,Li Xiaorui et al.TBM tunnel segment longitudinal stress transfer law [J].Modern tunnel technology,2018 zhongguo kuangye daxue(02): 65-71.The DOI: 10.13807 / j.carol carroll nki determined by MTT.2018.02.009.
HE Zhimin,LI Yuanfu,FAN Min.Discussion on safety grade determination of difficult mountainous railroad tunnels based on the superiority evaluation method[J].Railway Standard Design,2018,62(11): 125-128+160.DOI:10.13238/j.issn.1004-2954.201801070001
JIA Jianbo,GAO Guangyi,WEN Xingming.Comprehensive management technology of large-scale surge in Gaoligongshan tunnel[J].Tunnel Construction(in Chinese and English),2021,41(S1): 394-400.
Jiang,B.Y..Research on rock explosion breeding and control mechanism of TBM construction in deep composite ground tunnel [D].China University of Mining and Technology,2017.
Lai Jinxing,Qiu Junling,Pan Yunpeng et al.Of shield tunnel segment lining cracks in comprehensive monitoring and analysis [J].Modern tunnel technology,2015,52(02): 186-191.The DOI: 10.13807 / j.carol carroll nki determined by MTT.2015.02.028.
Lincoln Shi,Hui Zhou,Ming Song,Jingjing Lu,Chuanqing Zhang,Xinjing Lu.Experimental study on disturbance modeling of TBM excavation in deep composite strata[J].Geotechnics,2020,41(06):1933-1943.DOI:10.16285/j.rsm.2019.1014.DOI:10.16285/j.rsm.2019.1014.
Sun Lang,Ou Xiangping,Yan Zhihao,et al.Influence of geological characteristics of fault fracture zones on the stability of tunnel surrounding rock[J].Journal of Wuhan University of Technology,2020,42(03): 23-31.
Su Kai,Zhou Xiaoyang,Yang Fengwei et al.Research on Mechanical characteristics of new parallelogram segment lining structure of TBM tunnel [J].Journal of Wuhan University(Engineering and Technology Edition),2020,53(06):471-482.DOI:10.14188/ J.1671-8844.2020-06-001.[J].Journal of Wuhan University(Engineering and Technology Edition),2019,53(06):471-482.
Tang Bin.Research on perimeter rock stability and support technology of deep coal mine tunnel TBM construction[D].Anhui University of Technology,2016.
Wang Cheng,Tang Peng,Zhuang Haiyang et al.Consider done across large diameter pipe gallery of shield tunnel seismic performance research [J].Journal of natural disasters,2021,30(01): 116-123.The DOI: 10.13577 / j.j nd.2021.0112.
WANG Feiyang,ZHOU Kaige,FANG Yong,et al.Analysis of surrounding rock disturbance induced by TBM excavation of deeply buried railroad tunnel[J].Tunnel Construction(in Chinese and English),2021,41(02): 240-247.
Ye Fei,He Chuan,Wang Shimin.During the construction of shield tunnel lining segment mechanical characteristics and its impact analysis [J].Rock and soil mechanics,2011,32(6): 1801-1807 + 1812.DOI: 10.16285 / sm j.r.2011.06.040.
Yu Li,Wang Xiaoliang,Wang Mingnian,et al.Research on cooling technology of diversion tunnel for TBM construction[J].Tunnel Construction(in Chinese and English),2018,38(11): 1778-1784.
ZHOU Jianjun,YANG Zhenxing.Discussion on key issues of TBM construction in deep-buried long tunnels[J].Geotechnical Mechanics,2014,35(S2): 299-305.DOI:10.16285/j.rsm.2014.s2.049
Zhang Heng,Chen Shougen,Tan Xinrong,ZHAO Yubao.Research on mechanical behavior of shield tunnel segment in different strata [J].Chinese Journal of Underground Space and Engineering,2015,11(04):845-851.
ZHENG Weiqin,XU Jie,SUN Jie,et al.Force characteristics of TBM tunnel tubes in composite strata[J].Journal of Shandong University(Engineering Edition),2022,1-5.
ZHAO Qingyun.Study on deformation damage and control of peripheral rock in tunnel crossing fault fracture zone[D].Hefei: Anhui University of Architecture,2021.
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Copyright (c) 2024 Junling Qiu, guanfei Yang, xiaolong Huang, hu Luo, gang Si, haoran Hu, yuhua Chen
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