An analytical model for calculating vibrations from twin tunnels in a saturated poroelastic half-space

被引：5
|
作者：
Yuan, Zonghao [1 ]
Bostrom, Anders [2 ]
Cai, Yuanqiang [1 ]
机构：
[1] Zhejiang Univ Technol, Coll Civil Engn & Architecture, Hangzhou 310014, Zhejiang, Peoples R China
[2] Chalmers Univ Technol, Dept Mech & Maritime Sci, SE-41296 Gothenburg, Sweden
来源：
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING | 2019年 / 120卷
基金：
中国国家自然科学基金;
关键词：
Poroelasticity; Half-space; Twin tunnel; Wave translation;
D O I：
10.1016/j.soildyn.2019.01.035
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
In this paper a semi-analytical solution is proposed for modelling vibrations from a twin tunnel in a saturated poroelastic half-space. The twin tunnels are simulated as two hollow cylinders made of a viscoelastic material. The half-space containing the two circular cavities is described as a two-phase poroelastic material. The wave field in the half-space with two cylindrical cavities is taken as the combination of down-going plane waves from the ground surface and outgoing cylindrical waves from each tunnel. With the help of transformation and translation properties of the plane and cylindrical waves the boundary condition at each scattering surface can be expressed with the appropriate coordinates. Numerical results suggest that the reflection effect of the ground surface has limited influence on the response of the tunnels, but has a greater influence on the free-field response near the surface. Compared with the single tunnel solution, the wave field above the twin tunnels is greatly distorted.
引用
收藏
页码：23 / 27
页数：5
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