Volume 36 Issue 4
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Li Xiaobin. Solutions and Measures for TBM Extrication in Extremely Weak and Broken Water Rich Formation[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(4): 284-288. doi: 10.3969/j.issn.1007-2993.2022.04.005
Citation: Li Xiaobin. Solutions and Measures for TBM Extrication in Extremely Weak and Broken Water Rich Formation[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(4): 284-288. doi: 10.3969/j.issn.1007-2993.2022.04.005
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Solutions and Measures for TBM Extrication in Extremely Weak and Broken Water Rich Formation

doi: 10.3969/j.issn.1007-2993.2022.04.005

  • Shaanxi Railway Engineering College, Weinan 714099, Shaanxi, China

  • Received Date: 2021-03-01
    Available Online: 2022-08-08
  • Publish Date: 2022-08-08
    Abstract
  • When the horizontal pilot tunnel TBM of a railway tunnel project passes through the weak, broken and water rich stratum, it burst and collapsed. In the process of geological exploration and pipe shed construction, abnormal conditions occurred, such as excessive drilling pressure, mud wrapped drilling, water gushing in the hole and so on. Water poured suddenly and large amount of sediments gushed in the left side of shield tail, which caused the deformation of shield body and main beam area surrounding rock. TBM was trapped and had great risk. In order to deal with the problems and make TBM out of trouble quickly, the methods of advanced drilling, grouting reinforcement, high level adit drainage, installation of double speed reducer, advanced pipe shed support and shield surrounding excavation were adopted, and finally the TBM is out of trouble. The combined methods provides a reliable reference scheme for the construction and danger treatment of TBM in extremely weak and broken water rich strata.

     

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