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通过改进传感器型式,综合利用基阶模态和高阶模态频散数据正反演老路随深度方向面波速率,对比养护资料及钻探试验,建立了面波波速与老路压实度、标准贯入击数统计关系。试验结果表明:上硬下软道路结构频散数据求解需同时提取基阶模态和高阶模态信息,基阶模态特征反映下部低速层物性参数,高阶模态反映上部高速层物性参数,加权分层面波波速与压实度、标准贯入击数有较好的相关性。该试验结果适用于沪宁高速公路老路路况的评价。
By improving the sensor type and integrating the fundamental modal and high-order modal dispersion data, the surface wave velocities along the depth direction are positively and inversely compared with the conservation data and the drilling tests to establish the surface wave velocity and compaction degree of the old road. Number of statistical relations. The experimental results show that the data of dispersion structure of soft road under hard road and soft road need to extract both the first mode and the second mode information at the same time. The first order modal characteristics reflect the parameters of the lower low velocity layer. The higher mode reflects the upper layer properties of the upper layer, Wave velocity and compaction, the standard penetrate a good correlation. The test results apply to the evaluation of the old road condition of Shanghai-Nanjing Expressway.