高速公路路基压实质量快速检测研究

Investigation on rapid testing of compaction quality of expressway roadbed

提出了一种快速检测路基压实质量的方法。通过室内模型试验和对砂土和胶结土路基的压实度与刚度分析,确定了路基压实度与刚度之间的关系。探讨了影响该方法在路基工程中的因素,并得出结论认为该方法可以快速、非破坏性地获取路基的实际刚度。研究发现,土层厚度超过25 cm时,检测结果较为准确。在粉砂和水泥土路基中,刚度与压实度呈正相关关系。两者的关系更接近指数或幂函数。因此,两者可以相互转换。胶结土路基的刚度随着压实度的增加而增加。

This study proposes a method for rapid detection of roadbed compaction quality.Through indoor model tests and analysis of the compaction degree and stiffness of sandy and cemented soil roadbeds,the relationship between roadbed compaction degree and stiffness is determined.The factors influencing the method in roadbed engineering are explored,and it is concluded that this method can quickly and non-destructively obtain the actual stiffness of the roadbed.The study found that the detection results are more accurate when the soil layer thickness exceeds 25 cm.In both sandy and cemented soil roadbeds,the stiffness is positively correlated with the compaction degree.The relationship between the two is closer to an exponential or power function.Therefore,the two can be converted between each other.The stiffness of cemented soil roadbeds increases with the increase in compaction degree.