冲击压实技术在高速公路加宽扩建中的应用

Application of Impact Compaction Technology to Highway Widening and Extension

针对高等级公路加宽扩建工程中冲击压实技术应用问题,以吉黑公路拉林—五常—省界加宽扩建工程项目为依托,通过现场测得压实度和高程值,分析了冲击压实遍数与压缩变形、压实度的关系,以及冲击压实遍数对不同深度处压实度的影响,得出了该路段处的合理冲击压实遍数,并且提出了减少新路基工后沉降与变形的措施。采用简易贯入试验对冲击压实后路基的压实效果进行评价。研究成果对该地区路基的大面积机械化施工有重要的参考价值和指导意义。

The relationship between times of impact compaction and compactness, compression deformation, as well as the influence of impact compaction times on compactness in different depths were analysed by taking the widening and extension project of Lalin-Wuchang section of Jihei highway as an example, aiming to study the application of impact compaction technology to highway widening and extension. The reasonable times of impact compaction in this section was obtained by on-site measurement of compactness and elevation, and the measures for reducing settlement and deformation were also given. The effect of impact compaction was evaluated by a simple penetration test.