Scattering of plane P1 waves and dynamic stress concentration by a lined tunnel in a fluid-saturated poroelastic half-space

被引：46

作者：

Liu, Zhongxian ^{[1
]}

Ju, Xin ^{[1
,4
]}

Wu, Chengqing ^{[2
]}

Liang, Jianwen ^{[3
]}

机构：

[1] Tianjin Chengjian Univ, Tianjin Key Lab Struct Protect & Reinforcement, Tianjin 300384, Peoples R China

[2] Univ Technol Sydney, Sch Civil & Environm Engn, Sydney, NSW 2007, Australia

[3] Tianjin Univ, Dept Civil Engn, Tianjin 300072, Peoples R China

[4] Tianjin Housing Identificat Architectural Design, Precast Concrete R&D Ctr, Tianjin 300318, Peoples R China

来源：

TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY | 2017年 / 67卷

基金：

中国国家自然科学基金;

关键词：

Fluid-saturated poroelastic half-space; Lined tunnel; Elastic wave scattering; Dynamic stress concentration; Indirect boundary integral equation method (IBIEM); CIRCULAR TUNNEL; MULTIPLE-SCATTERING; IMPERFECT INTERFACE; SEISMIC RESPONSE; RAYLEIGH-WAVES; SV WAVES; CAVITY; SOIL; PROPAGATION;

D O I：

10.1016/j.tust.2017.04.017

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The scattering of plane fast compressional waves (P-1 waves) by a lined tunnel shallowly embedded in a poroelastic half-space is solved by indirect boundary integration equation method for a poroelastic half space. The displacement amplification on ground surface, dynamic stress concentration within the tunnel, and pore pressure fluctuation on the interface are investigated in the frequency domain, and are also compared with the results of the corresponding unlined cavity. Numerical results illustrate that the scattering of plane P-1 waves around the tunnel strongly depends on the porosity of the surrounding medium, frequency and angle of the incident wave, tunnel depth. Significant amplification effect on the surface ground motion and the hoop stress in the tunnel is observed in the case of high-porosity surrounding-rock and undrained interface.

引用

页码：71 / 84

页数：14

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