海绵城市中生物滞留沟对路基水分场分布的影响  

Effect of Biological Retention Ditch on Water Distribution in Subgrade of Sponge City

作　　者：赵军 林军志[1] 龚华凤 郑骁奇 ZHAO Jun;LIN Jun-zhi;GONG Hua-feng;ZHENG Xiao-qi(School of River&Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074;T.Y.Lin International Engineering Consulting(China)Co.,Ltd,Chongqing 401121)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]林同棪国际工程咨询(中国)有限公司,重庆401121

出　　处：《科学技术与工程》2018年第7期239-245,共7页Science Technology and Engineering

基　　金：重庆市社会民生科技创新专项(cstc2015shmszx1090)资助

摘　　要：随着城市化进程的不断加快,海绵城市作为一种新型的低影响开发理念,逐渐成为城市建设的趋势。就重庆某海绵城市试验路段为背景,研究海绵城市生物滞留沟对路基水分场的分布问题。在强降雨情况下,采用数值试验模型分析防渗膜半包情况下生物滞留沟对路基水分场的分布;再结合现场原位试验,采用高密度电法测量降雨前后电阻率分布,分析路基雨水下渗的分布规律。综合分析试验结果表明:该种路基结构形式能够满足海绵城市的吸、蓄、渗、净等要求。分析雨水下渗至路基的整个过程,得到路基水分场的分布情况;其中防渗膜对于降低雨水在车行道侧路基水分的增加起到关键作用。With the accelerating process of urbanization,sponge city,as a new concept of low impact development,has gradually become the trend of urban construction.A Chongqing City sponge test section as the background,Sponge city bioretention ditch on the distribution of subgrade moisture field was studied.First of all,in the case of heavy rainfall,a numerical test model was used to analyze the bioretention ditch distribution of subgrade moisture field under the condition of half bag of impervious film.Then,in combination with the in situ field test,the distribution of resistivity before and after rainfall was measured by high-density electric method,and the distribution of rainfall infiltration was analyzed.Comprehensive analysis of test results show that the subgrade structure can meet the requirements of absorbing,storing,seepage and netting in sponge city.Analyzing the whole process of rainwater infiltration into subgrade to get the distribution of subgrade moisture field,Roadside roadway in the increase of water plays a key role.

关 键 词：海绵城市 雨水入渗 路基 水分场 

分 类 号：U416.15[交通运输工程—道路与铁道工程]