Constitutive models seepage

Abstract Accidents of some arch dams show that dam failures are mainly caused by crack or failure of their foundation rocks, which are directly related to water seepage in the rock. This kind of fluid-rock interaction has an important influence on deformation and stress characters of the dam-rock system. In this paper, the stress and flow fields of dams and their foundation rocks are studied as a coupled system, using visco-elastic constitutive models and finite element solution method. The developed models and FEM technique were applied for analysing the continuous displacement of the 13 dam section of the Longyangxia Dam, and the calculated results agree well with the measured ones. 

COUPLED DAMAGE-SEEPAGE CONSTITUTIVE MODEL OF JOINTED ROCK MASSES AND ITS ENGINEERING APPLICATION... 

The jointed rock is treated as a hydraulically discontinuous mass. According to this model the rock matrix is not permeable and the seepage flow is limited in fractures. Taking into account the contribution of water saturation and seepage pressure, the total strain and constitutive equations of the rock mass was obtained. 

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