COUPLED HYDRO-MECHANICAL MODELING OF SEASONALLY AFFECTED UNSATURATED CLAYSTONE
In order to simulate coupled hydro-mechanical effects in seasonally affected unsaturated claystone, an elastic material model combined with an unsaturated single phase flow formulation, utilizing the Richards approximation, is applied in the finite element code RockFlow. The processes are coupled due to the incorporation of strains to the mass balance of the fluid as well as by Terzaghis effective stress law and the saturation dependent parameters in the non-linear material formulation. Swelling and shrinkage caused by the transient saturation field result in a change of anisotropic mechanical and hydraulic material properties. The performance of the approach is demonstrated by comparison with measured data, as conducted in Task C of DECOVALEX IV. The results given in this contribution focus on the prediction of the time dependent behavior of the expansive material caused by a seasonal change of humidity prescribed at the boundary of the domain.
Jobst Maβmann Gesa Ziefle Martin Kohlmeier Werner Zielke Hua Shao
Institute of Fluid Mechanics and Computer Applications in Civil Engineering,University of Hannover, Federal Institute for Geosciences and Natural Resources,Stilleweg 2, 30655 Hannover, Germany
国际会议
南京
英文
364-369
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）