Abstract
Until now, the quasi-three dimensional groundwater flow analysis has been used for many kinds of groundwater simulations in this country. However, to apply its computation method to the groundwater flow analysis for the tunnel and cavern in fractured rock masses is not available, because the discharges of both tunnel and cavern are unknown beforehand. In this paper, the authors proposed a new FEM technique for analyzing the flow around tunnel and cavern in fractured rock ground. The groundwater model is composed of some fractures and weathered layer on the rock ground, and the model can be applied to analyze the flow in both saturated and unsaturated aquifers under the assumption that the flow in weathered layer is subjected to the Dupuit's approximation.
