摘要
地铁车站基坑工程越来越深,尤其是工程地质条件复杂地区,降水成为一项必须的过程,如何准确获得地下水水文地质参数,常规需要进行抽水试验。传统的抽水试验主要为单井试验,存在误差大的缺点,获取参数精度不够,同时传统的计算方法又不能对群井试验进行求参。结合杭州某地铁基坑,下部存在比较厚的卵石层,基坑开挖过程中面临承压水突涌风险,利用群井抽水试验的方法,通过AquiferTest解析法和ModFlow三维渗流模型两种计算方法分析水文地质参数。
the foundation excavation engineering of subway station is getting deeper and deeper,especially in areas with complex engineering geological conditions,and precipitation has become a necessary process.How to obtain the hydrogeological parameters of groundwater accurately and the conventional pumping tests are needed.The traditional pumping test is mainly single-well test,which has the shortcoming of large error,and the precision of obtaining parameters is not enough.At the same time,the traditional calculation method cannot find parameters for group-well test.In this paper,combined with the foundation pit of a certain subway in Hangzhou,there is a relatively thick pebble layer in the lower part,and the foundation pit faces the risk of sudden rush of artesian water in the process of foundation pit excavation,the water pumping test method is used to analyze the hydrogeological parameters through the AquiferTest analytical method and the three-dimensional seepage model of ModFlow.
作者
罗建军
LUO Jianjun(Shanghai BV Geotechnique Co.,Ltd.,Shanghai 201108,China)
出处
《施工技术》
CAS
2019年第S01期654-658,共5页
Construction Technology
