Analysis on Seepage Field and Seepage Control Measure around Kunlong Hydropower Project

Abstract

The Kunlong Hydropower has high water head and complex geologic environment. It is necessary to study the seepage field and the seepage control measure. In order to set up a three dimensional seepage numerical model around the dam site, double fracture seepage systems contained main fractures network and fractured rock masses is adopted. Pipe to represent a drain hole and fissure to represent a line of holes methods are used in simulation of drainage curtain. After setting boundary conditions and calculating parameter appropriately, the whole seepage field around the Kunlong Dam is calculated with the finite element method. The optimal depths of the impervious curtain and drainage curtain are determined by sensitive analysis. The implications of the analysis results on the design of the project are significant.