风积沙路基压实特性试验研究

摘要

The main material to fill the subgrade in desert areas is the aeolian sand whose compaction quality could strongly affect the intensity and stability of highway. The impact laws for aeolian sand compaction due to moisture con- tent, particle size distribution, amplitude, vibration frequency and vibration time and so on are studied here by heavy compaction test and vibration test and theoretical analysis, so as to guide the construction of subgrade. There are differ- ences in the maximum dry density due to various experiment means. The reasonable range of experiment is also limited here in order to truly value the quality of subgrade by compaction degree.%风积沙是沙漠地区路基的主要填料,其压实质量直接影响着公路的强度与稳定性。通过重型击实试验和振动试验并结合理论分析,研究了含水率、颗粒级配、振幅、振动频率、振动时间等因素对风积沙压实的影响规律,用以指导路基施工。同时试验方法不同,测得的最大干密度值存在差异,为了能用压实度合理评价路基压实质量,对试验适用范围进行了界定。