Volume 36 Issue 1
Feb.  2022
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Hu Jing, He Zhijian, Wang Yiyang, Luo Xuedong. Interaction Analysis of New Shield Tunnel Passing Through Existing Tunnel in Short Distance[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(1): 16-21. doi: 10.3969/j.issn.1007-2993.2022.01.003
Citation: Hu Jing, He Zhijian, Wang Yiyang, Luo Xuedong. Interaction Analysis of New Shield Tunnel Passing Through Existing Tunnel in Short Distance[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(1): 16-21. doi: 10.3969/j.issn.1007-2993.2022.01.003

Interaction Analysis of New Shield Tunnel Passing Through Existing Tunnel in Short Distance

doi: 10.3969/j.issn.1007-2993.2022.01.003
  • Received Date: 2020-12-21
  • Publish Date: 2022-02-16
  • To study the interaction of the newly-built shield tunnel passing through the existing tunnel in a short distance, Wuhan Rail Transit Line 5 shield construction parallel to the existing line 2 was analyzed. The numerical model of shield tunnel and existing tunnel was established by FLAC3D. The influence law of the new shield tunnel construction on the existing tunnel deformation was studied, and the vault deformation characteristics of the new shield tunnel under the action of train dynamic load was analyzed and verified with the field monitoring data. The results show that: the closer to the tunnel face, the greater the deformation rate of the existing tunnel vault; the farther to the tunnel face, the deformation rate is relatively gentle. The horizontal deformation of both sides of the existing tunnel tends to protrude inward, and the deformation of one side close to the shield tunnel is far greater than that of the opposite side, but both of them are within the warning value range. The results show that the horizontal deformation of the existing tunnel near the shield tunnel increases, and decreases slightly after the completion of the subsequent grouting, and then maintains stable; the deformation of the new shield tunnel vault changes little under the action of the existing subway train dynamic load.

     

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