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Tunnel Construction >

2024 , Vol. 44 >Issue S2: 101 - 107

DOI: https://doi.org/10.3973/j.issn.2096-4498.2024.S2.010

Deformation and Failure Mechanism of Shallow Inclined-Layered Surrounding Rock Tunnel and Calculation Method of Geological Asymmetrically-Pressurized Load

  • LIU Jianyou ,
  • FANG Xu ,
  • FANG Qian ,
  • WANG Jun
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  • (1. China Railway Engineering Consulting Group Co., Ltd., Beijing 100055, China; 2. Beijing Jiaotong University, Beijing 100044, China)

Online published: 2024-12-20

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Abstract

To determine and calculate the geological asymmetrically-pressurized load of inclined-layered surrounding rocks, a drawer model considering the structural characteristics of inclined-layered surrounding rocks is established, and the calculation method for geological asymmetrically-pressurized load coefficient and the criterion of recognizing geological asymmetrically-pressurized load are proposed. Additionally, the influencing factors and laws of geological asymmetrically-pressurized load are analyzed, and the deformation and failure mechanism of the inclined-layered surrounding rocks is examined. The results reveal the following: (1) The internal friction angle of the rock face, tunnel buried depth, and rock layer inclination have a greater influence on the geological asymmetrically-pressurized load of the tunnel lining. The larger the tunnel buried depth and the internal friction angle of the rock face, the smaller the geological asymmetrically-pressurized load of the tunnel lining. (2) The larger the inclination angle of the rock layer, the greater the geological asymmetrically-pressurized load of the tunnel lining. A case study is conducted on a remediation project of tunnel support failure in Muchuan County, validating the effectiveness of the drawer model in describing the geological asymmetrically-pressurized load of inclined-layered surrounding rocks.

Key words： shallow tunnel; layered surrounding rock; drawer model; geological asymmetrically-pressurized load; load calculation method

Cite this article

LIU Jianyou , FANG Xu , FANG Qian , WANG Jun .

Deformation and Failure Mechanism of Shallow Inclined-Layered Surrounding Rock Tunnel and Calculation Method of Geological Asymmetrically-Pressurized Load

[J]. Tunnel Construction, 2024 , 44(S2) : 101 -107 . DOI: 10.3973/j.issn.2096-4498.2024.S2.010

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