黏土地基深井排水效果试验与渗流场分析  

Drainage effect of deep well on clay foundation and seepage field analysis

作　　者：徐力群[1] 江沆 王丽艳 沈振中[1] 李强[1] 

机构地区：[1]河海大学水利水电学院,南京210098 [2]无锡市水利设计研究院有限公司,江苏无锡214023

出　　处：《南水北调与水利科技》2017年第2期149-155,共7页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金项目(51179062);江苏省自然科学基金青年基金(BK2012410);江苏高校优势学科建设工程资助项目~~

摘　　要：深井降水效果将影响水利工程的排水方案设计。为了分析黏土地基工程深井井点降水措施的有效性,结合无锡市生态休闲岛工程,根据地质勘测资料,通过建立渗流分析有限元模型,采用固定网格有限元非饱和渗流计算分析方法,分析了深井降水的非稳定渗流场,对比分析了试验井的排水量实测数据,研究结果表明深井降水具有较好的排水效果,提出了地基土层渗透性对渗流场有较大的影响,建议了采取合适的井深和井间距以保证深井降水效果,结果可为类似黏土地基排水措施提供设计参考。The drainage effect of deep wells influences engineering design.According to the surveyed geological data,the finite element model for seepage analysis was established.Based on the fixed finite element method for unsaturated seepage analysis,the unsteady seepage field of deep well drainage was calculated.Then comparison was conducted between the numerical calculation and the test data.The results showed that the deep well drainage method was effective,and the permeability of foundation soil had a great influence on the seepage field.We suggest that appropriate well depth and well spacing should be adopted so as to ensure the effect of deep well drainage.The results can provide reference for drainage measures on similar clay foundations.

关 键 词：非稳定渗流分析 黏土地基 深井排水效果 现场试验 井点流量 

分 类 号：TV223[水利工程—水工结构工程]