摘要
针对近年来广州、长沙、武汉及云贵等岩溶发育地区地铁工程现状,文章以贵阳市轨道交通3号线为工程背景,采用二维数值模型对溶洞分布影响进行模拟计算分析。经模拟计算分析,得出溶洞不同方位、不同尺寸、与盾构隧道不同净距以及在不同围岩等级中对隧道开挖洞室稳定性、隧道衬砌管片受力的影响规律,以确定贵阳市轨道交通3号线盾构施工中溶洞处理范围,为岩溶发育区城市轨道交通建设提供参考。
In view of the current situation of metro projects in karst developed areas such as Guangzhou, Changsha, Wuhan, Yunnan and Guizhou in recent years, this paper takes Guiyang rail transit line 3 as a project study case, and uses two-dimensional numerical model to simulate and analyze the influence of karst cave distribution. Through the simulation calculation and analysis, it works out the influence patterns of different directions and dimensions of the karst tunnel, different clearance from the shield tunnel and different surrounding rock grades on the tunneling stability and the stress of the tunnel lining segments, so as to determine the affected area of the karst shield tunneling of Guiyang rail transit line 3, providing reference for the urban rail transit construction in the karst developed area.
出处
《现代城市轨道交通》
2020年第1期30-37,共8页
Modern Urban Transit
基金
国家重点研发计划资助课题(2017YFC0805004)
关键词
城市轨道交通
溶洞分布
盾构隧道
受力特性
处理范围
urban rail transit
karst cave distribution
shield tunnel
stress characteristics
affected area
