黄土地区公路路基冲击压实试验

Experiments of highway subgrade impact compaction in loess region

基于中国北方某湿陷性黄土路基工程,利用动力触探和面波法等方法对冲击压实工后的黄土路基进行对比检测。试验认为,冲击压实效果主要受路基填土含水量、起始压实度和颗粒组成等因素的影响;冲击压实能使路基整体强度得到均匀提高;可以用核子法、面波法、动力触探与标准贯入测试方法检测冲压质量。研究还表明,正确掌握试验与检测的时效性,有利于准确评价公路路基压实质量。

Based on the collapsible loess subgrade in China northern region, this paper used dynamic sounding method and surface wave method to detect the impact compaction behavior. The experiment results indicate that for the impact compaction behavior, the subgrade of water content, initial compacted degree and particle size composition are the main influence factors; impact compaction can homogeneous enhance the strength of highway subgrade; the nuclear magnetometer, surface wave method, dynamic sounding and SPT methods are effective to detect the impact compaction behavior. The research results still emerge that, exactlly mastering the time effect of testing and detecting is very important for accurately evaluating the compactive effort of highway subgrade.