含砂低液限粉土路基冲击压实技术研究

Study on Impact Compaction Technique for Sub-grade with Sand Silt of Low Liquid Limit

针对含砂低液限粉土路用性能差,常规压实方法难以达到压实度要求等施工难题,采用冲击碾压技术进行路基补压试验,获取冲压遍数、冲压沉降量等施工控制参数。通过试验确定采用沉降与面波法进行冲压质量评价,为全线推广使用冲击压实技术提供技术保障。

Targeting at the poor performance of sand silt of low liquid limit used for road construction and the difficulty in construction in meeting the requirement for compactness with ordinary compaction method, this paper studies adopting an impact wiling technique to perform a sub - grade supplemental compaction test and attains the construction control parameters such as rounds of compaction, compaction settlement volume, etc.. The settlement and surface wave methods are confirmed to be used for the quality evaluation by the aid of the test, which provide a technical guarantee for popularizing the use of impact compaction technique in all its aspects.