武汉可溶岩地区基坑地质结构分类与主要工程地质问题处置

Geological Structure Classification and Disposal of Main EngineeringGeological Problems of Foundation Pit in Wuhan Karst Region

为了研究武汉可溶岩地区基坑的主要工程地质问题,以武汉区域地质资料为基础,运用地质综合分析法对大量勘察资料进行比对分析,重点对基坑的岩溶地质结构按照4个岩组的上下不同组合进行了划分。结果表明,基坑的岩溶地质结构可划分为18种类型;基坑开挖会引发不同于常规基坑的岩溶工程地质问题,主要有岩溶地下水的坑底隆起、突涌水、抗浮问题,以及基坑边坡、坑底稳定等问题。针对各种岩溶工程地质问题提出了相应的工程处置措施,对指导工程实践具有重要意义。

In order to study the main engineering geological problems of foundation pits in Wuhan karst areas,a large number of survey data are compared by using the geological comprehensive analysis method based on the regional geological data of Wuhan area.The karst geological structure of the foundation pit is divided according to the different combinations of four rock groups.The study shows that the karst geological structure is divided into 18 types.And the excavation of foundation pit will cause problems such as pit bottom heave,water inrush and anti floating of karst groundwater,slope stability and pit bottom stability.Putting forward corresponding engineering treatment measures for various karst geological problems is of great signifiance to guide engineering practice.