The seepage evolution law under the fault creep in right bank of Longyangxia Dam

The present work shows the application of a new methodology, to find out the seepage evolution law in the earth dam under its flow conditions, to a real field case: the Longyangxia Dam, in Qinghai, China. Under the influence of various loads and environmental factors, the creep property of dam foundation fault will be bound to be changes in the evolution of its seepage field. Therefore, the normal compression creep and the tangential shear creep of dam foundation faults are studied in this paper. Moreover, assuming the non-tension capacity in the normal direction, the normal compression creeping model and the tangential shear creeping model of the fault are established. On the basis, the time series evolution model on the permeability coefficient of the fault in dam foundation is built. These methods have already been applied into Longyangxia Dam and the result indicates that the seepage condition is normal when dam foundation seepage coefficient are getting smaller.