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台涵背回填料性质对瑞雷波传播特性的影响

, PP. 37-42

Keywords: 道路工程,瑞雷波,现场试验,台涵背回填,含水率,级配

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Abstract:

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。

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