Ali Ameli, PhD, PEng, Geo Engineering Ltd. BC, Canada
ABSTRACT: This case study discusses a reliable, quick solution to evaluate the water ingress into the excavations, while the construction is in progress. The matter is reviewed for a 15 m diameter tunnel in sedimentary rocks in the vicinity of Karun River through enlarging the pilot tunnel. The water inflow inside the tunnel when excavated in full was estimated based on the amount of water discharge observed in the pilot. The approach did not need any further drilling or field permeability testing and eliminated the need for grouting. The predicted results were in harmony with the actual discharge level occurred in practice and relieved the management of facing with unpredicted situations.
For complete paper contact email@example.com