›› 2007, Vol. 28 ›› Issue (S1): 653-657.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Numerical analysis of upwarping deformation of existing tunnels under a new tunnel’s excavation

YU Jin1, XU Qiong-he2, XING Wei-wei3, DING Yong4, CHENG Wan-zhao1   

  1. 1. Geotechnical Engineering Department, Nanjing HyDraulic Research Institute, Jiangsu 210024, China; 2. Nanjing Municipal Design and Research Institute Co., Ltd, Jiangsu 210008, China; 3. Nanjing Metro Co., Ltd, Jiangsu 210008, China; 4. Civil Engineering Department, Nanjing University of Science and Technology, Jiangsu 210094, China
  • Received:2007-05-10 Online:2007-10-25 Published:2014-03-28

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Abstract: The protection of the Longpan Tunnel’s excavation which are right beyond two existing shield tunnels of Nanjing No.1 subway is presented. Corresponding to unstabilizing condition and stabilizing condition with high-pressure chemical churning piles, the existing shield tunnel’s upwarping deformation during the excavation is analyzed with ANSYS software of 3-D elasto-plastic finite element method. It is observed that the tunnel’s upwarping deformations were too great without stabilizing and are safet with stabilizing. The calculated results are compared with the in-situ observation data.

Key words: foundation excavation, shield tunnel, upwarping deformation, 3-D numerical analysis

CLC Number: 

  • U 459
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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