Study on Approprate Parameters of Grouting Circle for TBM Tunnel under High Water Pressure in Water-Enhanced Region

摘要

Water load on lining and limiting discharge are two key issues affecting the structure safety and rationality in the process of designing a tunnel in high water pressure and water-enriched region.In this paper,with the principle of blocking groundwater and limiting discharge, the impacts of grouting circle's thickness and seepage coefficient on external water pressure of lining and discharge are studied.Based on the case of the IBM tunnel in Shanxi Yellow River Diversion Project China, which is located at high water pressure and water-enriched karst region, the appropriate parameters of grouting circle are put forward by the comparison between theoretical calculation and numerical simulation.