风积沙的压实机理

为解决风积沙作为公路路基填料难以压实的问题，通过重型击实和振动压实对比试验及理论计算，分析了风积沙的压实机理。结果表明：风积沙无粘性是导致其压实曲线呈双峰值的原因，也是其颗粒在压实时有着特殊运动规律的原因。风积沙颗粒间能否重新排列及压实功是影响压实效果的主要因素，振动加速度对这两个因素均有较大影响。而重型击实只对压实功有影响，因此风积沙的压实应采用振动法。且风积沙振动干压实在工程上是可行的．

Compaction Mechanism of Aeolian Sand

By means of contrast experiment that contrasted weighty tamping and vibrauon compaction, the compaction mechanism of the aeolian sand was analyzed to solve the problem that aeolian sand was difficult to impact when it was used as roadbed material. As a result,the reason of having two peak value in the aeolian sand tamping curve is that aeolian sand is not a sticky material; it is also the reason that the aeolian sand granule has special movement rule while impacting. The main factors affecting compaction effect are realigning of granule and the power of compaction. Vibration acceleration can influence the two factors largely ,but weighty tamping can only influence the power of compaction, so the way to impact aeolian sand is vibration compaction, and aeolian sand vibration compaction in dry condition is feasible in engineering.