Analysis on karst development and water burst in a subway station
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摘要: 岩溶可诱发基坑涌水、涌泥等灾害,给在富水岩溶区及断层破碎带区域施工的地铁工程带来诸多难题.因此,调查车站区域岩溶发育特征,分析突水模式,对车站基坑的设计和工程施工具有重要的指导作用.文章以贵阳某地铁车站深基坑岩溶涌水治理工程为背景,采用现场调查及理论分析相结合,借助三维地质模拟软件,对该地铁车站的岩溶发育特征和涌水条件进行系统分析,总结出基坑岩溶发育特征及涌水突水模式,建立了岩溶、断层破碎带与地铁车站空间关系的三维地质模型.对类似地铁车站岩溶水文地质勘察及涌水防治方案的设计和施工具有参考作用.Abstract: Water and mud burst occurs commonly in karst region,which causes many problems to the engi-neering construction of subway station in the water-rich karst area and the fault rupture zone.It is of great importance to the design and construction of subway station excavation by investigating of the characteristics of the karst development and water burst.In this paper,the treatment of karst water burst in the deep pit of a subway station in Guiyang is presented.Based on site investigation and theoretical analysis,the character-istics of karst development and water burst in the subway station was studied and summarized with the aid of 3D geological software.The spatial relationship between the karst,the fault zone and the subway is estab-lished and represented by 3D geological model.This study can be very useful to the design and construction of similar subway station in terms of karst hydrogeology and the treatment of water burst.
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