南水北调工程压实换填粘性土料渗透试验研究  

Experimental Study on Permeability of Compact Replacing Cohesive Soil in South-to-North Water Diversion Project

作　　者：谭峰屹[1] 陈劲松[1] 邹荣华[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：《路基工程》2010年第2期40-43,共4页Subgrade Engineering

基　　金：国家"十一五"科技支撑计划(2006BAB04A10);长江科学院博士科研启动金(YJJ0809)

摘　　要：压实换填粘性土料是南水北调中线一期工程对总干渠膨胀岩试验段(潞王坟段)渠坡处理方式之一,对其防渗性要求较高。采用GUELPH现场入渗仪在碾压现场开展了原位渗透试验研究。结果表明:采用18 t振动平碾,对不同铺土厚度进行碾压试验,铺土厚度35 cm的碾压效果较好,碾压至12遍时,压实度可达99.4%,渗透系数为4.90×10-6cm/s;采用不同的碾压机械,对铺土厚35 cm,以20 t振动凸块碾的碾压效果较好,碾压10遍,压实度可达97.2%,渗透系数为4.89×10-6cm/s。Compact replacing cohesive soil is one of the methods for treatment of canal slope in swelling rock test section of the main canal （ Luwangfen Section） in the first stage of the central line of South-to-North water diversion project, which has a higher requirement for permeability resistance. In-situ permeability test is carried out in rolling site with GUELPH infiltration meter. The result indicates that with 1St vibratory smooth- wheel roller, for different paving thickness, 35cm has a better compaction; its compactness can reach 99.4% and permeability coefficient is 4. 90 ×10^-6cm/s at the 12^th roiling. With different rolling machines, for paving thickness of 35cm, 20t vibratory sheepfoot roller receives better compaction effect; its compactness can reach 97.2% and permeability coefficient is 4. 89 ×10^-6cm/s at the 10^th rolling.

关 键 词：换填粘性土料 压实 原位渗透试验 

分 类 号：TU446[建筑科学—岩土工程]