›› 2015, Vol. 36 ›› Issue (S1): 568-572.doi: 10.16285/j.rsm.2015.S1.099

• Geotechnical Engineering • Previous Articles     Next Articles

Theoretical analysis of vertical deformation of existing metro tunnel induced by shield tunneling under-passing in a short distance

ZHANG Qiong-fang1, 2, LIN Cun-gang3, DING Zhi4, XIA Tang-dai1, 2, SHAN Hua-feng1, 2   

  1. 1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; 3. College of Civil, Construction and Environmental Engineering, Ningbo University, Ningbo, Zhejiang 315211, China; 4. Department of Civil Engineering, Zhejiang University City College, Hangzhou, Zhejiang 310015, China
  • Received:2015-03-06 Online:2015-07-11 Published:2018-06-14

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Abstract: The process of shielding changes the additional stress of the above existing tunnel which causes the deformation of the tunnel and has certain influence on the structural safety of the existing tunnel. The Mindlin solution can be used to calculate the additional stress along the central axis of the existing tunnel caused by the shield driving parameters such as the compressing pressure of the cutter-head q, friction of the shield skin f, synchronous grouting pressure p. The additional stress caused by soil loss can be calculated by the image method theory. Winkler foundation model can be used to calculate the deformation of the existing tunnel. According to the different crossing processes, the total deformation of existing tunnel can be calculated by combining the above four parts of deformation. Finally, comparing the theoretical results with the measured data of metro construction project in Hangzhou, the valid of the method is confirmed.

Key words: shield driving parameters, Mindlin solution, image method theory, Winkler foundation model

CLC Number: 

  • U 452
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