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对沙漠沙的路用性能进行了系统的试验研究。试验结果表明:沙漠沙的压实可采用常规的击实试验方法和振动密实法,压实效果受颗粒级配、含水量、荷载大小、振动频率及振幅等多种因素影响;沙漠沙在一定压力作用下压缩变形时间较短,压缩应变与外加压力之间呈非线性变化规律,压缩模量与外加压力呈近似线性变化规律;沙漠沙的内摩擦角与压实度之间呈线性变化规律,颗粒级配是主要影响因素,含水量影响较小;沙漠沙的室内回弹模量和加州承载比与压实度之间大致呈非线性增大规律,在某一压实度区间增大的幅度非常小。
The desert road performance with a systematic experimental study. The results show that the compaction of desert sand can be carried out by conventional compaction test and vibration compacting method. The compaction effect is affected by many factors such as particle size distribution, water content, load size, vibration frequency and amplitude. The compressive deformation time is short, the compressive strain is nonlinear with the applied pressure, and the compressive modulus is linear with the applied pressure. The internal friction angle and the compaction degree of the desert sand show a linear variation , The particle size distribution is the main influencing factor and the influence of water content is small. The indoor resilience modulus of California desert and the loading ratio of California and the compaction degree increase roughly nonlinearly, and increase in a certain compaction interval The rate is very small.