摘要
南水北调中线工程是解决华北水资源危机的一项重大基础设施,全长1 400余km,穿越膨胀土(岩)渠段长约340 km。为研究南水北调中线工程膨胀土渠坡处理方案的处理效果,在总结已有研究成果的基础上,采用离心模型试验方法,开展了衬砌、换填黏性土+衬砌、土工格栅回填弱膨胀岩+衬砌3种处理方案的离心模型试验,并比较了换填黏性土方案中不同厚度的影响。试验研究中,模拟了衬砌失效的漏水工况、渠道长年输水工况及快速疏干的检修工况。观测了垂向变形、孔隙水压力和土压力变化,并采用图像处理技术,分析了试验过程中渠坡的变形,比较了各处理方案的处理效果。
South-to-North Water Transfer Project （SNWTP） is a mega infrastructure to solve water crisis in North China, its length is about 1 400 km, of which the section through the expensive soil is about 340 kmo Centrifuge modeling tests which inelude three disposal plans of lining, replaeement clay and weak swelling roek with geogrid were carried out to study the treatment effect based on existing researeh results, the impacts of the different replaeement elay thieknesses were eompared. The eonditions of lining leaking, ehannel water transport all the year round and channel rapid dewatering were simulated, and the ehanges of vertieal deformation, pore water pressures and earth pressure were reeorded. Also, the PIV technique was adopted to capture soil displaeements by image analysis. In this paper, the effects of different disposal plans for expansive soil slope were discussed and compared.
出处
《长江科学院院报》
CSCD
北大核心
2009年第11期42-46,51,共6页
Journal of Changjiang River Scientific Research Institute
基金
国家"十一五"科技支撑计划项目(2006BAB04A10)
关键词
南水北调中线工程
膨胀土
渠道边坡
离心模型试验
Middle-Route of South-to-North Water Transfer Project
expansive soil
ehannel slope
centrifuge modeling test
