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掌握瑞利波在分层地基中的传播和能量分布特征是进行瑞利波勘测的关键。建立了3类工程常见土质及其分布的浅层3层地基模型:规则地基、含硬夹层地基和含软夹层地基,基于传递矩阵法研究了瑞利波在三类地基中的传播和能量分布特征,将计算得到的地表处瑞利波时间域内的振动信息作为表面波谱分析(SASW)法的测试数据进行模拟测试。结果表明,实测频散曲线与理论频散曲线中能量占优的模式相对应,SASW法适用于大部分土层分布情况的几十米深度范围的浅层工程地质勘测。研究成果可用来指导现场测试和土层反演。
Grasp the Rayleigh waves in the stratified foundation of the propagation and energy distribution characteristics of the Rayleigh wave survey key. Three types of common soil and its distribution of shallow three-layer foundation model are established: regular foundation, including hard sandwich foundation and soft interlayer foundation, and the propagation and energy distribution of Rayleigh wave in three types of foundation are studied based on transfer matrix method Characteristics, the calculated ground surface Rayleigh wave time domain vibration information as the surface wave spectrum analysis (SASW) method of test data to simulate the test. The results show that the measured dispersion curve corresponds to the energy dominant mode in the theoretical dispersion curve, and the SASW method is suitable for the shallow engineering geological survey within the depth of several tens of meters for the distribution of most of the soil layers. The research results can be used to guide on-site testing and soil inversion.