A novel method to calculate pressure on the twin-tunnel in layered strata

Hai-Min Lyu; Shui-Long Shen; Annan Zhou; Ke-Lin Chen

doi:10.1016/j.mex.2020.101126

A novel method to calculate pressure on the twin-tunnel in layered strata

MethodsX. 2020 Nov 6:7:101126. doi: 10.1016/j.mex.2020.101126. eCollection 2020.

Authors

Hai-Min Lyu¹, Shui-Long Shen^{1

2}, Annan Zhou², Ke-Lin Chen³

Affiliations

¹ MOE Key Laboratory of Intelligent Manufacturing Technology, Department of Civil and Environmental Engineering, College of Engineering, Shantou University, Shantou, Guangdong 515063, China.
² Civil and Infrastructure Engineering Discipline, School of Engineering, Royal Melbourne Institute of Technology (RMIT), Victoria 3001, Australia.
³ China Railway Eryuan Engineering Group Co. Ltd., China.

Abstract

Tunnel pressure from the surrounding rocks plays a critical role for the safety of tunnel. The existing methods for calculate twin-tunnel pressure supposed that the tunnel is buried in a uniform soil layer. This work presents detailed equations of an analytical method to calculate the twin-tunnel pressure in layered strata, which can consider the effects from soil layers. The proposed method is applied to analyse the pressure of the metro twin-tunnels in Chongqing. To demonstrate the efficiency of the proposed analytical method, both the tunnel pressure in layered strata and single strata were calculated. The method article is a companion paper with the original article [1]. • Analyses of the soil parameters; • Determine the failure pattern A/B; • Calculate the vertical and horizontal pressure.

Keywords: Analytical method; Layered strata; Tunnel pressure; Twin-tunnel.