基于地震信号反演滑坡动力学机制  

Inverted Landslide Dynamics Based on Seismic Signals

作　　者：赵娟[1] 漆静晨 杨佳琛 陈何玲 ZHAO Juan;QI Jingchen;YANG Jiachen;CHEN Heling(School of Mechanical Engineering and Electronic Information,China University of Geosciences,388 Lumo Road,Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)机械与电子信息学院

出　　处：《大地测量与地球动力学》2019年第10期1007-1012,共6页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(4150020346)~~

摘　　要：以2003年千将坪滑坡事件为例,基于地震信号分析大型高速滑坡启动之后的滑体运动特性。通过国家地震台网采集因滑坡激发产生的地震信号,反演得到滑坡区域的受力-时间函数,再经由时频分析划分滑坡期间的子事件,进而推导滑体的运动参数并还原滑坡过程。结果显示,由地震信号反演所求得的滑床坡度、滑坡方向以及滑体位移等数值与现场勘踏所得数据相符;同时,通过对滑坡子事件的分析,可分辨出因对岸河堤阻挡而产生的部分滑体反倾过程,从而还原较完整的滑坡过程。In this paper,we take Qianjiangping landslide in 2003 as an example to study landslide movement characteristics based on seismic inversion technology.We first collect seismic waves inspired by the landslide through the China earthquake networks(CEN),then invert for the force-time function of the landslide source,divide landslide sub-events using time-frequency analysis,and finally obtain the dynamics of the sliding body and restore the landslide process.The sliding bed slope,landslide direction,and sliding body displacement derived from seismic inversion coheres with the results from the field survey.We also distinguish a reverse motion from the sub-events analysis.This study helps understand the sliding mechanism of large-scale high speed landslides and is helpful for remote monitoring of landslide disasters.

关 键 词：千将坪滑坡 滑坡机制 波形反演 

分 类 号：P315[天文地球—地震学]