浅层三层地基的SASW法模拟勘测研究  

Simulated SASW test for shallow three-layered ground

作　　者：郭晔[1] 黄新[1] 吴佳晔 

机构地区：[1]北京航空航天大学交通科学与工程学院,北京100083 [2]四川升拓测试技术有限公司,四川自贡643000

出　　处：《岩土工程学报》2008年第8期1229-1235,共7页Chinese Journal of Geotechnical Engineering

摘　　要：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。Transmission and energy distribution characteristics of Rayleigh waves in layered ground were important for Rayleigh wave test. Three kinds of shallow three-layered ground models, regular ground, ground with hard interlayer, soft interlayer and representative soils and layers were established. Transmission and energy distribution character of Rayleigh waves in these models were discussed, and oscillation of Rayleigh waves in time-domain at ground surface was calculated as simulated SASW （Spectral Analysis of Surface Waves） test data by the transfer matrix method. It was shown that dispersion test curve was consistent with the energy-dominant mode（s） of theoretical dispersion curves, and the SASW test was suitable for most kinds of shallow ground with different soil and layer characteristics. This research may be used as guidance for SASW field tests and back-calculation.

关 键 词：瑞利波勘测 传递矩阵法 SASW法 实测频散曲线 理论频散曲线 

分 类 号：TU195[建筑科学—建筑理论]