用瞬态多道瑞利波法研究夏垫隐伏断裂附近的浅层速度结构变化  

Detecting variation of near-surface velocity structure near Xiadian buried fault with transient multi-channel surface wave

作　　者：贾辉[1] 何正勤[1] 叶太兰[1] 

机构地区：[1]中国地震局地球物理研究所,中国北京100081

出　　处：《地震地磁观测与研究》2008年第1期15-19,共5页Seismological and Geomagnetic Observation and Research

基　　金：地震科学联合基金资助(A07037);中国地震局地球物理研究所论著编号:08AC2003

摘　　要：用瞬态多道瑞利波法,对夏垫隐伏断裂附近的浅层速度结构进行了调查研究,利用f-k域分析方法提取瑞利波频散曲线,分别用遗传算法和半波长方法反演,得到断裂附近的横波速度结构和瑞利波相速度分布剖面。反演结果与钻孔资料的对比表明,瞬态瑞利波法对于探测上断点埋深较浅的隐伏断裂是有效和可靠的。In the paper, the near-surface velocity structure detection of Xiadian buried fault with transient multi-channel surface wave （MASW） is presented. With an f-k domain transformation, the dispersion curve is derived. Then, the S-wave velocity structure and Rayleigh wave phase velocity profile are inversed with genetic algorithm and half-wave length method, respectively. The contrast between the inversed result and the borehole data indicates that in detection of buried faults, which the break point is not much deeper, the transient MASW is effective and reliable.

关 键 词：瞬态多道瑞利波 频散 速度结构 隐伏断裂 

分 类 号：P315.31[天文地球—地震学]