Work

Visco-elastic interface and dynamic response of a lined tunnel in anisotropic rock mass under unloading waves

Year: 2025

Type: article

Abstract: Anisotropy of rock masses plays a significant role in predicting the dynamics response of tunnel excavation in rock mass. In this paper, the dynamic response of a lined tunnel in anisotropic rock mass under unloading waves is studied, and the dynamic visco-elastic interface model is introduced to analyze the interface effect. By using the wave function expansion method, the unloading waves and the wave fields in the tunnel lining are expressed, and the viscosity and elastic coefficients of interface model are proposed to analyze the imperfect interface effect on the dynamic response of existing tunnel. Three unloading paths due to the tunnel excavation are considered, and the analytical solutions of displacements and stress fields around the existing tunnel lining under these unloading paths are derived. An approximate numerical integration method is introduced to calculate the displacements and stresses around the existing tunnel. In numerical examples, the dynamic circumferential stress around the existing tunnel under different interface parameters, unloading paths and geometrical and physical parameters of tunnels is analyzed. Comparison with the existing numerical results validates this dynamic model.

Source: Soil Dynamics and Earthquake Engineering

DOI: 10.1016/j.soildyn.2025.110033

Authors: Xue-Qian Fang, Zhao-Feng Zhong, Bai-Lin Li, Xin-Yu Liu, Ya-Wen Xiong

Institutions: Dongguan University of Technology, Shijiazhuang Tiedao University

Language: English

Topic: Geotechnical Engineering and Underground Structures

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,900

Funders: National Natural Science Foundation of China, Basic and Applied Basic Research Foundation of Guangdong Province