期刊
INTERNATIONAL JOURNAL OF GEOMECHANICS
卷 16, 期 2, 页码 -出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GM.1943-5622.0000535
关键词
Unsaturated soil; Rainfall infiltration; Coupled seepage and deformation; Analytical solution
资金
- Basic Research Program of China [2013CB733202, 2012CB026104]
- National Natural Science Foundation of China [51479001, 411722807, 41272005]
- Excellent Youth Foundation of Sichuan Scientific Committee [2012JQ0007]
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection [SKLGP2014Z009]
Assuming that the water content and hydraulic conductivity of unsaturated soil are exponential functions of the pressure head, Green's function is used to obtain analytical solutions to one-dimensional coupled rainfall infiltration and deformation in unsaturated soils under varying surface rainfall flux. The analytical solution considers varying flux and pressure head at the top boundary and arbitrary initial conditions. In particular, nonlinearly increasing rainfall intensity at the surface boundary is considered. The result indicates that the coupling of seepage and deformation has a significant effect on the pressure-head profiles for the transient unsaturated seepage. The coupling effect is closely related to the boundary conditions. The coupling effect almost disappears if ponding at the ground surface occurs. The ponding time is different under the coupled and uncoupled conditions. There is a quick change in the pressure-head profiles near the time of ponding or peak or discontinuous rain intensity.
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