›› 2009, Vol. 30 ›› Issue (S2): 473-478.

• Geotechnical Engineering • Previous Articles     Next Articles

Exploration of design methods of support structure in loess tunnel

ZHANG Hong1, ZHENG Ying-ren2, YANG Zhen3, WANG Qian-yuan1, GE Su-ming4   

  1. 1.School of Sciences, Qingdao Technological University, Qingdao 266033, China; 2.Department of Architecture and Civil Engineering, Logistical Engineering University of PLA, Chongqing 400041, China; 3.Shanghai Tunnel Engineering Co. Ltd., Shanghai 200232, China; 4.Chongqing Land Resource and House Administration Bureau, Chongqing 400015, China
  • Received:2009-07-25 Online:2009-08-10 Published:2011-06-21

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Abstract: Sections of double layer compound liner test of second-line terminal tunnel for Baoji–Lanzhou railwag are modeled and analyzed by using ANSYS software, safety factors of the surrounding rock are calculated by strength reduction finite element method, and safety factors of the liner are calculated by applying finite element method based on the combined effect of soil and structure. The loess tunnel design must meet the two stable requirements: according to the preliminary proposals, the safety factors of the surrounding rock can’t be less than 1.15 to 1.2; at the same time, the safety factors of the initial liner can’t be less than 1.3 after the initial support; the safety factors of the liner are greater than 2.0 to 2.4 after the second liner so that the construction and operation security can be ensured. Evaluating and analyzing the safety factors of the surrounding rock and the liner, quantitative methods of designing loess tunnel support structure are formatted.

Key words: strength reduction finite element method, ANSYS, loess tunnel, support structure

CLC Number: 

  • TU 354
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