Abstract
The characteristics of water inflow in tunnels within a fault fracture zone were investigated in this paper. The model test was conducted to explore the influence of surface water and the effect of grouting on the water pressure distribution and inflow quantity in the tunnel. Water inflow was characterized by four stages—wet stage, dripped stage, gushed stage, and collapsed stage—based on monitoring of the inflow quantity. The rapid decrease in water pressure was observed before the collapse of the tunnels. Meanwhile, the critical thickness of the layer installed against the inrush (the “anti-inrush layer”) was studied in the model test; this layer varied from 2 to 6 cm under different conditions. It was found that the presence of surface water increases the water inflow and the minimum thickness of the anti-inrush layer, and that grouting may effectively decrease the water inflow and also affect the minimum thickness required for the anti-inrush layer. A numerical simulation was conducted, and it was found by comparisons with the model test and field investigation that good agreement was achieved.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
