Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (S1): 312-318.doi: 10.16285/j.rsm.2019.1405

• Geotechnical Engineering • Previous Articles     Next Articles

Limit equilibrium method for calculating surrounding rock pressure of an ultra-shallow-buried underpass

SUN Xi-yuan1, 2, HENG Chao-yang1, 2, ZHOU Zhi1, 2, ZHANG Jian-tao1, 2   

  1. 1. China Academy of Building Research, Co., Ltd., Beijing 100013, China; 2. CABR Foundation Engineering Co., Ltd., Beijing 100013, China
  • Received:2019-08-03 Revised:2019-12-04 Online:2020-06-19 Published:2020-06-09
  • Supported by:
    This work was supported by Technology of Retaining and Protecting for Super-shallow and Large Rectangular Section Urban Underpass (20161602330730024).

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Abstract: In order to reasonably calculate the surrounding rock pressure of an ultra-shallow-buried passageway with rectangular section during construction, an available finite element method is suggested firstly to analyze the failure mode of the surrounding rock of the primary support structure under the limit state of bearing capacity. Based on the failure mode, the limit equilibrium equation of each surrounding rock slider is established, and the ultimate equilibrium solutions of the vertical and lateral surrounding rock pressures of the super shallow buried primary support structure in silty clay soil layer in Qingdao area are obtained. Finally, the calculation value and field test of surrounding rock pressure are compared, demonstrating a maximum deviation amplitude is less than 9.0%, and the feasibility of limit equilibrium method is verified.

Key words: surrounding rock pressure, limit equilibrium method, underpass, ultra-shallow-buried, rectangular section

CLC Number: 

  • TU452
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