南水北调与水利科技2016，Vol.14Issue(6)：135-140,6.DOI:10.13476/j.cnki.nsbdqk.2016.06.023
基于三维非稳定渗流分析的隧洞开挖地下水环境影响评价
Effect of tunnel excavation on groundwater environment based on three-dimensional unsteady seepage flow analysis
摘要
Abstract
During the construction process of tunnel excavation in a hydro‐project ,the method of all excavation completed before lining was commonly used .As for the seepage flow stability calculation on tunnel excavation temporary state to impact ground‐water environment ,which is not in line with the actual situation ,and often amplifies the water level fluctuation and effective range .In view of this ,adopting the technique of unsteady seepage numerical simulation to assess the impact on groundwater en‐vironment will be more reasonable .Taking the construction process of a diversion tunnel as an example ,based on unsteady satu‐rated and unsaturated seepage theory ,the three‐dimensional finite element numerical model was established to calculate the tran‐sient seepage field of tunnel excavation area .The tunnel groundwater variation from commencement to completion of works was summarized .Groundwater environmental impact assessment on the process of tunnel excavation was done .The results showed that (1) it was feasible to predict the process of water level falling and affective range enlarging by three‐dimensional unsteady seepage flow analysis ;(2) the groundwater in this region was less effected by excavation of diversion tunnel and groundwater recharge and discharge relations remained unchanged .关键词
隧洞开挖/非稳定渗流/地下水环境/环境影响评价/三维有限元法/降落漏斗Key words
tunnel excavation/unsteady seepage flow/groundwater environment/environmental impact excavation/three-dimen-sional finite element method/cone of depression分类
建筑与水利引用本文复制引用
周人杰,沈振中,徐力群,鲁剑..基于三维非稳定渗流分析的隧洞开挖地下水环境影响评价[J].南水北调与水利科技,2016,14(6):135-140,6.基金项目
江苏高校优势学科建设工程资助项目（水利工程）；江苏省自然科学基金青年基金项目（BK2012410）；中央高校基本业务费项目（2014B11914） FundA Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions ；Natural Science Founda-tion of Jiangsu Province （BK2012410）；Fundamental Research Funds for the Central Universities （）
