【摘要】 通过筛分试验、干振试验、水振试验、标准击实试验、压缩试验分析了六种不同级配风积沙样的压实特性与压缩特性。结果表明:毛乌素地区风积沙超过94%颗粒粒径集中在0.5~0.25mm范围内,不均匀系数Cu为1.32,细度模数Mx为1.74,曲率系数为1.05,属不良级配中沙。由三种试验得到的最大干密度的情况为:水振试验>标准击实试验>干振试验。水振试验达到最大干密度所用时间为1min左右,干振时间为7min。毛乌素地区风积沙的标准击实试验曲线形状呈先凹后凸形的S型曲线,风积沙在干燥状态下和含水量为w=10~12%情况下均可被压实。原始沙的压缩试验表明,砂性土也存在着对时间的滞后效应并且该沙样的压缩性较差。更多还原

【Abstract】 In this paper we studied the compaction and compression characteristics of six different kinds of graded aeolian sands by using different test methods,i. e. screening tests,dry vibration test,water vibration test,compacting test and compression test. Tests results showed that in Maowusu region about 94% of particle size ranged from 0. 5mm to 0. 25 mm and with uniformity coefficient of 1. 32,fineness modulus of 1. 74,curvature coefficient of 1. 05. Maximum dry density obtained from the three tests showed: water vibration test > compaction test > dry vibration test. It took 1 min to reach the maximum dry density by using water vibration test and 7 min by using dry vibration test. The compaction curve was plotted similar to a horizontally- written letter S and indicated aeolian sand could be well compacted whatever it was dry or wet. Compression tests of original sand showed that the compression of the sand is poor.更多还原