基于瑞雷波法的高填路段墙背回填质量无损检测与评价

Non-destructive Testing and Evaluation of Backfill Quality for HighFilled Section Based on Rayleigh Wave Method

山区公路建设多高填深挖路段,墙背、台背、涵背等特殊位置高回填路基易受场地限制。为解决大型机械进场施工不便、人工夯实能量不足等造成的路基土不密实、易产生沉降超限病害等问题,采用瑞雷波法进行了临临高速公路高填路段墙背填土压实检测,检测获取墙背填土瑞雷波速分布情况,并建立波速与压实度关联关系。与传统方法点位检测相比,瑞雷波法可实现墙背路基压实质量无损检测与评价,通过科学方法实现检测波速解译,可用于指导工程实践。

In the construction of mountainous highways,there are many high filled and deep excavation sections,and special locations such as wall back,abutment back,and culvert back are prone to high filledsubgrade limitation due to site conditions.In order to solve the problems of non-compaction of subgrade soil and excessive settlement disease caused by the inconvenient construction of large machinery and insufficient manual compaction effort,the Rayleigh wave method is used to conduct the compaction testing of wall backfill soil in the high filled section of Linlin expressway.The Rayleigh wave velocity distribution of wall backfill soil is obtained through testing,and the correlation between wave velocity and compaction degree is established.Compared with the traditional methods of point detection,the Rayleigh wave method can achieve the non-destructive testing and evaluation of the compaction quality of wall back subgrade.The detection wave velocity can be interpreted through the scientific methods,so as to guide the engineering practice.