ROCK FRACTURE SIMULATION FOR GROUNDWATER PREDICTION IN ROCK TUNNELS

摘要

Groundwater inflows in rock tunnels typically concentrate in narrow zones wherernconducting fractures cluster together: these concentrations may hamper tunnelrnadvance and are a major source of claims. However, current predictive methodologiesrndo not allow the designer or the contractor to predict these concentrations. Thernpaper describes a geostatistical methodology for the simulation of clusters and fracturesrnin 1D, 2D and 3D. The resulting discrete network of fractures could be used tornsimulate groundwater flow and predict groundwater inflow into tunnels. The simulationrnmethodology was demonstrated and validated by using data from Pedernales Falls,rnYucca Mountain nuclear waste disposal project (Barton and Larson 1985), and thernTBM-excavated South Cobb tunnel project (GA).