The loess in Baowagou valley of Zhidan County was taken as the research target ,compaction and permeability tests were conducted according to the classification of Civil Engineering Experiment Standard (SL237-1999) .The results showed Cu > 5 ,Cc ∈ (1 ,3) of the loess ,the content of soil particles smaller than 0 .005mm was 18 .95% ,liquid limit ωL averagely was 27 .98% ,plastic limit ωP averagely was 17 .10% ,and plasticity index Ip 10 .89 ,averagely ;the maximum dry density of soil sample was 1 .70 g/cm3 ,the optimal water content was 14 .99% ;the permeability coefficient was 4 .32 × 10-5 cm/s .The soil particle size in the area is not evenly distributed and graded well ,with good permeability it is fit for dam construction .%以陕西省志丹县顺宁镇任坪村保娃沟门流域的前拐沟黄土作为研究对象，按照土工试验规程（SL237-1999）进行分类、击实、渗透等各项试验，对试验结果进行分析。分析结果表明，该流域黄土的Cu ＞5，Cc ∈（1，3），小于0．005 mm的土粒含量18．95％，土料的液限ωL 平均为27．98％，塑限W P 平均为17．10％，塑性指数 Ip 平均为10．89；土样最大干密度为1．70 g/cm3，最优含水率为14．99％；渗透系数为4．32×10-5 cm/s。该区土壤粒径分布不均匀且级配良好，渗透性较好，适合筑坝工程要求。
展开▼
