Evaluation of fluid flow from a dam foundation using numerical modeling technique by UDEC software

Abstract

Numerical analysis methods have been using in engineering projects for a long time, but using of these methods for seepage analysis of rock mass isn't that much old. UDEC has the capability to perform the analysis of fluid flow through the fractures of a system of impermeable blocks. A fully coupled mechanical-hydraulic analysis is performed, in which fracture conductivity is dependent on mechanical deformation and, conversely, joint water pressures affect the mechanical computations. It has been tried to evaluate the seepage through the karstic limestone foundation of Behesht-Abad dam, Iran. In order to perform this research, geological data during a study phase in Behesht-Abad dam site was firstly gathered, and then different methods have been used to calculate the engineering properties of rock mass. Then the structural model of dam foundation based on the geological data constructed and various water heads were applied on the model. Thereafter fluid flow from each point beneath the dam is available. © 2013, EJGE.