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针对瞬态瑞雷波法用于检测道路工程台涵背回填质量这一问题,通过现场试验结合有限元方法,分析台涵墙背回填中土层深度、填料含水率、颗粒级配、边界条件等因素对瑞雷波传播特性的影响,结果表明:考虑土层深度,得到的探测结果稍优于不考虑深度影响的情况;填料细粒含量多,含水率变化对波速影响较大,而对于巨粒土和砾类土而言,含水率变化对波速影响小;土体级配良好,采集数据信噪比高,比较常见的几种填料,在砂类土中获得的信号质量最好;路基边界对测试结果影响较小,但是如果台涵墙背倾斜,则需结合工程实际考虑测线下方墙体的影响,防止对结果误判。
Aiming at the problem of transient Rayleigh wave method used to detect the backfill mass of road projects, by means of field test and finite element method, the depth of soil layer, filler water content, particle size distribution, boundary conditions The results show that, considering the depth of soil layer, the detection result obtained is slightly better than that without considering the depth; the content of filler fine particles and the change of water content have a great influence on the wave velocity, For gravelly soil and gravelly soil, the change of water content has little effect on the velocity of wave. Soil grading is good, the signal-to-noise ratio of the collected data is high, and some of the more common ones have the best signal quality in sand soil. The boundary of embankment has little effect on the test results. However, if the wall of the platform is dorsal, the influence of the wall under the survey line should be considered in combination with the engineering practice to prevent misjudgment of the result.