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| Stratum deformation characteristics caused by construction of shield tunnel with a small turning radius |
| XU Youjun1,2,3, WANG Zhiguang1,2,3, ZHANG Xu1,2,3*, GUO Fei4, GAO Shenglei4, YANG Kun4
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1. School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China;
2. Academician Workstation of Mine Safety and Underground Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China;
3. Engineering Research Center of Urban Underground Engineering at Universities of Inner Mongolia Autonomous Region, Baotou 014010, Inner Mongolia, China;
4. Beijing Municipal Construction Group Co., Ltd., Beijing 100048, China |
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Abstract Based on a shield tunnel with a small turning radius project, the stratum deformation characteristics caused by the construction of shield tunnel with a small turning radius and the influence law of tunnel buried depth on stratum deformation were studied through analyzing on-site measurement and numerical simulation. The results showed that the on-site measured data were consistent with the simulation results. The shallower the tunnel was buried, the smaller the surface deformation was. The overbreak made the surface deformation inside the curve larger and caused the centerline of the sedimentation tank to offset to the overbreak side in the meantime. The horizontal deformation characteristics of the strata on both sides of the curve were significantly different from those of the linear tunnel. The stratum on the inner side was disturbed more seriously, which should be paid enough attention to. The influence law of tunnel buried depth on the horizontal deformation of stratum on both sides of the curve was different: the shallower the tunnel was buried, the greater the horizontal deformation of the strata inside the curve was and the smaller that outside the curve was.
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Received: 03 April 2022
Published: 20 June 2022
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