Abstract
Tunnel construction is gradually developing to areas with high in situ stress; the deeper the tunnel construction, the more intense the earthquake disturbance. Under the background of frequent earthquakes, the seismic characteristics of tunnels become an important content related to the safety and stability of engineering structures. In view of the key problems of seismic response and vibration reduction measures for complex deep buried tunnels, the methods of advanced grouting and foam concrete aseismic are studied in this paper. Firstly, through geological survey, the in situ stress and geological conditions of the study area are analyzed. The structural characteristics of surrounding rock and related rock mechanics parameters are analyzed. The failure criterion of concrete lining under dynamic load is studied theoretically, and the relevant numerical calculation parameters are modified. A numerical model based on viscous boundary conditions is established. Through numerical calculation, the seismic response of tunnel surrounding rock and lining under different damping measures is analyzed. The research results have theoretical research value and social and economic benefits for ensuring the safety and stability of tunnel structure and improving the seismic fortification level.
Highlights
With the gradual transfer of tunnel construction to the high seismic intensity area, tunnel seismic has become a hot and difficult problem
How to put forward reasonable and effective seismic mitigation measures is an important purpose of tunnel seismic response analysis
Lai et al [1] used the tunnel seismic damage investigation method combined with the Wenchuan earthquake to analyze and summarize the tunnel seismic damage. e results show that the seismic damage of fault fracture zone is the most serious, followed by tunnel entrance section and common section
Summary
With the gradual transfer of tunnel construction to the high seismic intensity area, tunnel seismic has become a hot and difficult problem. Li [4] analyzed the failure characteristics of the tunnel under seismic load and divided it into collapse and landslide near the tunnel, opening cracking, lining, and surrounding rock collapse, lining cracking and dislocation, ground uplift and cracking, and initial support deformation and cracking. Shock and Vibration element numerical analysis method to analyze the control effect of the support on the surrounding rock of the tunnel. E Wenchuan earthquake wave was used as the excitation wave in the model test in order to study the mechanical characteristics of shallow bias tunnel with small clear distance under earthquake. Through geological investigation and numerical analysis, the force characteristics of tunnel surrounding rock and lining under the action of earthquake load are studied and the method to reduce the effect of earthquake on the tunnel and determine the control parameters of the response is proposed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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 call
