花岗岩残积土水土特征曲线的试验研究

The experimental research on the soil-water characteristic curve of the granite residual soil

摘要: 本文采用渗析法测定花岗岩残积土的水土特征曲线,详细介绍了渗析法的试验步骤及注意事项,并对花岗岩残积土的水土特征曲线进行了分析。通过试验得到残积土水土特征曲线,无论是干燥段或是浸湿段,下降都较为平缓。花岗岩残积土的进气值较低,仅为10kPa左右,而土体残余含水量较大,为20%左右,说明花岗岩残积土持水能力较强。文章还对水土特征曲线的滞回圈进行了分析,认为水土特征曲线的滞回圈应该是由多种原因引起的。

Abstract: Using osmotic method in testing the soil-water characteristic curve of the granite residual soil,the paper introduces the steps of the experiment in detail,and points out the matters need attention.Through the result of the experiment,we found that the water-soil characteristic drops slowly in both the drying and the wetting processes.The granite residual soil has small entering air suction,only about 10kPa,however,the residual saturation degree value is about 20%.This indicates that the residua...