Analytical analysis of stress and displacement for surrounding rock of deep-buried rectangular tunnel in layered strata

International Conference on Manufacturing Technology, Materials and Chemical Engineering

材料科学;化学工业

Rao, Junying^1 ; Liu, Dengkai^1 ; Xie, Caijin^1 ; Nie, Chongxin^1 ; Ping, Li^2

School of Civil Engineering, Guizhou University, Guiyang

550025, China^1

Shenzhen Zhongjianyuan Building Technology Co., Ltd., Shenzhen

518063, China^2

关键词: Analytic functions;    Analytical analysis;    Complex variable method;    Deep-buried tunnel;    Lateral pressure coefficient;    Stress and displacements;    Theoretical solutions;    Tunnel surrounding rock;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/592/1/012117/pdf
DOI  :  10.1088/1757-899X/592/1/012117

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This study presents a theoretical solution on stress and displacement of the deep-buried tunnel surrounding rock in layered strata. Based on theory of equivalent layer method, we convert layered strata into homogeneous ones and then map the rectangular tunnel in the coordinate plane z to the unit circle of complex plane ζ, through using a complex variable method and calculating the analytic functions Φ(ζ) and Ψ(ζ) with Matlab, the study obtains that the stress of the surrounding rock of deep-buried rectangular tunnel in layered strata. Subsequently, we derive the strain and displacement of the surrounding rock. Finally, we study the effects of lateral pressure coefficient and grade of surrounding rock and height-to-width ratio of the tunnel on the stress of tunnel surrounding rock. Based on our analysis, we formulate valuable rules.