用人工源和天然源面波联合探测浅层速度结构

Detect the Velocity Structure of Shallow Crust with Artificial and Nature Source Rayleigh Wave Technology

本文在简要介绍天然源与人工源瑞雷面波勘探基本原理、数据采集和资料处理方法的基础上,结合3个不同场地的探测实例,阐述了天然源和人工源瑞雷面波方法在浅部速度结构探测中的应用效果。结果表明,根据不同的场地条件和探测目的要求,分别采用天然源、人工源瑞雷面波方法提取瑞雷波频散曲线,再用遗传算法反演得到工程场地浅部地层横波速度结构的技术方法是有效和可行的。该方法对于类似工程的浅部横波速度结构探测具有经济适用、简便快捷的优点。

In this paper we firstly give a brief introduction of the basic principle of artificial and nature source Rayleigh wave exploration, the data acquisition and processing, then using three different sites’ detection as an examples, we present the application of detecting shallow velocity structure with artificial and nature source Rayleigh wave methods. According different sites’ condition and detecting propose, we choose artificial and nature Rayleigh wave techniques separately （double source method for short） to extract the dispersion curve of Rayleigh wave and then use genetic algorithm to get shallow S-wave velocity inversion. Our results show that this method is effective and practical. For similar projects of shallow S-wave detection, this proposed method is economic, useful, simple and fast.