南水北调中线总干渠膨胀岩渗透性状试验研究  

Permeability Behavior of Expansive Rock of Middle Routeof South to North Water Transfer Project

作　　者：童军[1] 龚壁卫[1] 陈劲松[1] 

机构地区：[1]长江科学院水利部岩土力学与工程重点实验室,武汉430010

出　　处：《长江科学院院报》2009年第11期67-71,共5页Journal of Changjiang River Scientific Research Institute

基　　金："十一五"国家科技支撑计划项目(2006BAB04A10)

摘　　要：为了解南水北调中线总干渠膨胀岩渠坡在处理和未处理条件下的渗透性状,分别开展了现场双环、GUELPH仪以及室内渗透试验。原位试验结果表明:泥灰岩的稳态渗透系数及入渗深度均大于黏土岩;格栅加筋处理场地的稳态渗透系数和入渗深度分别约为土袋处理场地的1/4,1/2。格栅加筋处理可作为一种十分有效的膨胀岩边坡处理措施。室内重塑渗透试验结果表明:天然含水率下相同干密度的重塑泥灰岩的渗透系数大于黏土岩,其渗透系数随干密度的增大而减小的速率小于黏土岩,且测得重塑膨胀岩样渗透系数均小于场地的原位渗透系数。The double ring field tests, Guelph tests and laboratory reconstituted permeability tests were carried out respectively to investigate the permeability behaviors of the untreated and treated expansive rock slopes in the main canal of the Middle Route of the South to North Water Transfer Project. The results of the double ring field tests show that both the permeability coefficient and infiltration depth of the marlite are greater than those of the clay stone, respectively, and that the stable permeability coefficient and infiltration depth obtained in geogrid reinforced field are one-fourth and one-second of those receirved in the treatment field with soil bags, respectively Geogrid reinforced treatment has been proved to be an effective measure for the expansive rock slope. The results of laboratory reconstituted permeability tests show that the permeability coefficient of remolded marlite samples is greater than that of the reconstituted clay rock when their dry densities are the same with natural water content. The decrease of the permeability coefficient of the marlite is more significant than that of the clay rock with the same increase of the dry density. Moreover, the measured permeability coefficients of marlite and clay rock from the laboratory tests are less than that obtained from the field permeability tests, respectively.

关 键 词：南水北调中线工程 膨胀岩 渗透性状 

分 类 号：TV223.1[水利工程—水工结构工程]