Propagation of Rayleigh wave in unsaturated soil at different boundary conditions

被引：0

作者：

Chen, Weiyun ^{[1
]}

Chen, Guoxing ^{[1
]}

Liu, Zhijun ^{[2
]}

Xia, Tangdai ^{[2
]}

机构：

[1] Institute of Geotechnical Engineering, Nanjing Tech. University, Nanjing

[2] MOE Key Laboratory of soft Soils and Geoennvironmental Engineering, Zhejiang University, Hangzhou

来源：

Shuili Xuebao/Journal of Hydraulic Engineering | 2015年 / 46卷 / 11期

关键词：

Attenuation coefficient; Dispersion characteristics; Propagation velocity; Rayleigh wave; Unsaturated soil;

D O I：

10.13243/j.cnki.slxb.20141112

中图分类号：

学科分类号：

摘要：

Most of the soil of the earth's surface is not completely saturated, so when the traditional two-phase media theory is used for dynamic analysis, the results are often inconsistent with the actual situation. In view of this objective problem, the unsaturated soil is chosen to be our research object. Based on the wave theory of three-phase porous media, the research on the dispersion characteristics of Rayleigh wave in unsaturated soil half-space is carried out. Two different boundary conditions are considered: (a) water/air impermeable boundary, and (b) water/air permeable boundary. According to the boundary conditions and constitutive relations, the corresponding dispersion equations of Rayleigh wave are derived. Then, through the Newton-Raphson method, the equations could be solved numerically. Lastly, the influences of soil saturation degree, frequency and intrinsic permeability of the soil on the dispersion characteristics of the Rayleigh wave at different boundary conditions are discussed, respectively. The results show that, at both these two kinds of boundary conditions, the propagation of the Rayleigh waves with various frequencies is affected by the saturation change. Moreover, the influences of frequency and permeability coefficient on the propayation characteristics of Rayleigh waves at different boundary conditions are quite different. © 2015, China Water Power Press. All right reserved.

引用

页码：1329 / 1336

页数：7

共 18 条

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