复杂水文地质条件下基坑降水应用研究  

Application study on foundation pit dewatering in complex hydrogeological conditions

作　　者：何义 彭涛 毛洪运 王琦琳 He Yi;Peng Tao;Mao Hongyun;Wang Qilin(Chengdu Surveying Geotechnical Research Institute Co.,Ltd.,MCC,Chengdu 610023,China)

机构地区：[1]中冶成都勘察研究总院有限公司,成都610023

出　　处：《工程勘察》2020年第6期39-42,78,共5页Geotechnical Investigation & Surveying

摘　　要：巴基斯坦印度河平原地区地层以饱和粉细砂层为主,水文地质条件复杂,不同位置渗透系数变化较大,给基坑降水设计及施工带来了一定难度。基于该区域复杂的水文地质条件,结合该区某电站基坑降水实例,按照水文地质参数进行降水方案初步设计,通过群井试抽水及降水试验反演出该区综合水文地质参数,并调整优化原设计方案,优化后基坑降水达到了降水深度要求。研究结果表明,在复杂水文地质条件下,基坑降水采用动态化设计、信息化施工是行之有效的方法,也是获取综合水文地质参数的可靠方法。研究结果可为该地区类似工程提供参考,也为基坑降水提供借鉴。In the Indus plain area of Pakistan,the saturated fine sand layer is the main stratum,the hydrogeological conditions are complex,and the permeability coefficient of different locations changes greatly,which makes some difficulties to the design and construction of the foundation pit dewatering.Based on the complex hydrogeological conditions in the area,combined with the dewatering example for the foundation pit of a power station in the area,the preliminary design of the dewatering plan was carried out according to the hydrogeological parameters,and the comprehensive hydrogeological parameters in the area were inverted by using the group pumping and dewatering tests,and the original design plan was adjusted and optimized. After the optimization,the foundation pit dewatering reaches the requirements of the dewatering depth. The research results show that under the complex hydrogeological conditions,the dynamic design and informatization construction of the foundation pit dewatering is an effective method,and it is also the most reliable method to obtain the comprehensive hydrogeological parameters. The study results could provide the reference for similar projects in the area and also provide the reference for foundation pit dewatering.

关 键 词：巴基斯坦 基坑降水 水文地质参数 抽水试验 

分 类 号：P641.2[天文地球—地质矿产勘探] TV223.6[天文地球—地质学]