摘要
以青岛地铁一期工程(3号线)清江路站为例,介绍在青岛特有的"上软下硬"地质条件下,浅埋暗挖单拱大跨结构在地铁车站中的应用。通过建立有限元模型,对施做完二衬时水土同时作用、全水无围岩压力、全围岩无水和中板浇筑后水土同时作用时4种施工工况下的结构内力进行计算分析,得到在水土同时作用有中板支撑时结构为最不利荷载工况,通过配筋计算可知主体隧道二衬配筋较为合理。
This article takes Qingjiang Road station project on the first phase Qingdao metro Line 3 for example, introduces the application of single-arch long-span structure in a shallow mining-excavated subway station. Qingdao＇s geological condition features ＂ soft strata over-laying hard strata＂ By establishing finite element model, the internal forces in the secondary lining under four working conditions were calculated and analyzed： the combined action of water and soil; action of water without rock pressure; rock pressure alone without water pressure; combined action of water and soil after the middle floor completed. It is concluded that most unfavorable working condition is the single arch with middle floor under the combined action of water and soil. Results of calculation also showed that the reinforcement in tunnel secondary lining is reasonable.
出处
《铁道标准设计》
北大核心
2011年第10期93-95,共3页
Railway Standard Design
关键词
浅埋暗挖
单拱大跨
地铁车站
内力分析
Shallow mining excavation
Single-arch and long-span
Subway station
Internal force analysis
