Calculation Method for Surrounding Rock Pressure of Shallow Buried Loess Tunnel

被引：7
|
作者：
Yu L. [1 ,2 ]
Lü C. [1 ,2 ]
Duan R. [1 ,2 ]
Wang M. [1 ,2 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan
[2] Key Laboratory of Traffic Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu, 610031, Sichuan
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2019年 / 40卷 / 04期
关键词：
Failure mode of tunnel; Fracture angle; Loess area; Shallow tunnel; Surrounding rock pressure;
D O I：
10.3969/j.issn.1001-4632.2019.04.09
中图分类号：
学科分类号：
摘要：
Combined with the actual failure mode of shallow buried loess tunnel, the failure mode of shallow buried loess tunnel was constructed. The formula for calculating surrounding rock pressure was derived based on the limit equilibrium theory, and the formula for calculating the fracture angle of surrounding rock was derived according to the stress state on the sliding-cracking surface of surrounding rock. The calculated values of fracture angle and surrounding rock pressure obtained by this method were compared with the measured values and the calculated fracture angles by the existing Xie Jiaxiao method, Terzaghi method and Yi Xiaoming method respectively to verify the correctness and effectiveness of the calculation method used. The influence of different parameters on the fracture angle and pressure of surrounding rock was analyzed. Results show that the calculated values of both the fracture angle and pressure of surrounding rock in this paper are closest to the measured values. The fracture angle of surrounding rock decreases with the increase of lateral pressure coefficient, internal friction angle and tunnel depth, and increases with the increase of rise-span ratio. The pressure of surrounding rock decreases with the increase of lateral pressure coefficient, the internal friction angle of soil and the cohesion, and increases gradually with the increase of rise-span ratio, tunnel depth and soil weight. The calculation method for the pressure and fracture angle of surrounding rock in this paper overcomes the shortcomings of existing research methods, and fully considers the influence of lateral pressure coefficient, rise-span ratio, buried depth, internal friction angle, cohesion and weight on the pressure of surrounding rock. © 2019, Editorial Department of China Railway Science. All right reserved.
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页码：69 / 76
页数：7
相关论文
共 16 条
  • [1] Yang F., Yang J., Limit Analysis Method for Determination of Earth Pressure on Shallow Tunnel, Engineering Mechanics, 25, 7, pp. 179-184, (2008)
  • [2] Yang X., Qin C., Limit Analysis of Supporting Pressure in Tunnels with Regard to Surface Settlement, Journal of Central South University, 22, 1, pp. 303-309, (2015)
  • [3] Du D., Daniel D., Yang X., Analysis of Earth Pressure for Shallow Square Tunnels in Anisotropic and Non-Homogeneous Soils, Computers and Geotechnics, 104, pp. 226-236, (2018)
  • [4] Chambon P., Corte J., Shallow Tunnels in Cohesionless Soil: Stability of Tunnel Face, Journal of Geotechnical Engineering, 120, 7, pp. 1148-1165, (1994)
  • [5] Zhao L., Huang F., Sun Q., Et al., Rock Pressure of Unsymmetrical Shallow Rectangular Tunnel Based on Upper Bound Limit Analysis Method, Journal of Central South University: Science and Technology, 45, 9, pp. 3093-3103, (2014)
  • [6] Xie J., Formation Pressure of Shallow Tunnel, China Civil Engineering Journal, 6, pp. 58-70, (1964)
  • [7] Li P., Zhou Y., Wu D., Calculation Methods for Surrounding Rock Pressure and Application Scopes, China Railway Science, 34, 6, pp. 55-60, (2013)
  • [8] Liu X., Fang Q., Calculation Method for Loose Surrounding Rock Pressure of Shallow Tunnel under Asymmetrical Pressure on Variable Slope, China Railway Science, 38, 2, pp. 64-70, (2017)
  • [9] Wang M., Guo J., Luo L., Et al., Calculation Method for the Surrounding Rock Pressure of Deep Buried Large Sectional Loess Tunnel of High-Speed Railway, China Railway Science, 30, 5, pp. 53-58, (2009)
  • [10] Lei M., Peng L., Shi C., Model Test to Investigate the Failure Mechanisms and Lining Stress Characteristics of Shallow Buried Tunnels under Unsymmetrical Loading, Tunnelling and Underground Space Technology, 46, pp. 64-75, (2015)
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