风积沙压实机理的研究

Research on the Compaction Mechanism of Aeolian Sand

以陕蒙高速公路毛乌素沙漠风积沙为研究对象,分析了该风积沙的颗粒组成、物理力学性质和最大干密度的确定方法。通过重型击实试验绘制了风积沙击实特性曲线,揭示了风积沙的压实特性;利用冲击振动复合作用压路机模型进行了室内外压实试验,研究了风积沙在振动、冲击及冲击振动复合作用下的压实机理和压实特性,改善了风积沙现场施工工艺。

Taking the aeolian sand from Mao Wusu desert in Shanxi-Inner Mongolia highway as the research object, this paper analyzes its pellet forms and main characteristics, as well as the method of confirming the biggest dry density. According to the heavy impaction experiment, the impaction curve is drew and the compaction characteristics of aeolian sand is got. Indoor and outdoor researches are conducted with a combined roller model. In those researches, the compaction mechanism and the characteristics of this aeolian sand under the conditions of vibration,impaction and complex role of impaction and vibration are studied. At the same time the aeolian sand on-site construction process is improved.