一级阶地岩溶塌陷区地铁车站基底处理研究  

Study on the Basal Treatment of Subway Station in the First-grade Terrace Karst Collapse Area

作　　者：汪国良[1] WANG Guo-liang(China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, China)

机构地区：[1]中铁第四勘察设计院集团有限公司

出　　处：《佳木斯大学学报（自然科学版）》2019年第5期687-691,共5页Journal of Jiamusi University：Natural Science Edition

摘　　要：为了解决武汉长江一级阶地岩溶塌陷区或类似地质条件下地铁车站主体结构设计问题,通过分析长江一级阶地岩溶地质特征以及溶洞分布规律,提炼岩溶塌陷区地铁车站分析模型要点,利用MidasGTSNX建立三维有限元模型,对地铁车站两种基底岩溶处治方案进行了详细模拟分析,包括旋喷格栅加固、格构式地连墙方案,得到加固前后车站结构受力及变形规律,及其对岩溶塌陷的控制作用,并进行经济性比较,为此类地质条件下地铁车站设计及选择合适的岩溶处理方案提供参考。Aiming at the design of the subway station structure in the first-grade terrace karst collapse area of Wuhan Yangtze River or similar geological conditions, the karst geological characteristics and karst cave distribution rules in this area are analyzed. Analysis model of the subway station in the karst collapse area is proposed. Detailed numerical simulation analysis has been performed on two kinds of basal karst treatment scheme in subway station, including rotary-jet grille reinforcement and lattice diaphragm wall, based on 3D finite element models built by latest Midas GTS NX. Stress and deformation characteristics of the station structure before and after reinforcement are investigated. Research on the control effect on karst collapse and economical comparison are made. This research is expected to provide reference for the subway station design and selection of appropriate karst treatment schemes in such geological conditions.

关 键 词：长江一级阶地 岩溶塌陷 地铁车站结构 基底处理 

分 类 号：TU93[建筑科学—结构工程] TU478