市政道路矿山法隧道抗震计算研究

Research on Seismic Calculation of Municipal Road Tunnel by Mining Method

随着我国市政建设快速发展,城市外扩而形成的地震区矿山法隧道连接线日益增多,因此对矿山法隧道进行抗震计算研究具有较重要的意义。本文以惠州大亚湾龙海一路东段市政工程为背景,根据工程地质情况,采用反应位移法分别计算分析了隧道结构在静力、多遇地震、基本地震和罕遇地震工况下的内力与变形;分析了不同工况下矿山法隧道结构强度的控制因素及抗震性能要求,进而为矿山法隧道抗震设计计算和构造措施提供了合理化建议。

With the rapid development of municipal construction in China,the number of mining method tunnel connecting lines in earthquake areas due to urban expansion is increasing.Therefore,it is of great significance to study the seismic calculation of tunnels by mining method.In the context of municipal project at the eastern section of Huizhou Daya Bay Longhai No.1 Road,this paper calculates and analyzes the internal forces and deformation of the tunnel structure under static,frequent earthquakes,basic earthquakes and rare earthquake conditions by seismic displacement method according to the project geology;and analyzes the control factors of mining method tunnel structural strength under different working conditions and seismic performance requirements,and accordingly provide reasonable suggestions for the seismic design calculation and structural measures of mining method tunnel.