从地震层析速度确定原位岩土力学参数  

IN SITE ROCK-SOIL MECHANIC PARAMETERS DEDUCED FROM SEISMIC TOMOGRAPHY VELOCITY

作　　者：金维浚[1] 张衡[2] 尚彦军[1] 段心标[3] 张文辉[1] 

机构地区：[1]中国科学院地质与地球物理研究所中国科学院页岩气与地质工程重点实验室,北京100029 [2]广州海洋地质调查局,广州510760 [3]中国石化南京石油物探技术研究院,南京211103

出　　处：《工程地质学报》2014年第4期765-771,共7页Journal of Engineering Geology

基　　金：国家自然科学基金面上项目(41372324);中国地质调查局“白龙江流域主要活动断裂调查与地质灾害效应研究”项目资助

摘　　要：地震纵横波层析成像速度与岩土弹性力学参数有关,多道面波分析(MASW)采用类似二维反射地震处理,得到共中点互相关道集(CMPCC)提取面波频散曲线,由面波频散曲线反演二维速度结构,在岩土结构分层等方面有良好的效果。通过同一剖面的折射地震波层析成像得到纵波速度结构,对岩土层的动弹模量和泊松比等力学参数进行分析,为下一步地质工程设计及岩土力学试验提供参考。The tomography velocity of compress and shear seismic wave is related with the mechanic parameters of rock and soil.The dispersion curves of the multi channel analysis of surface wave method （MASW）can be gotten from the common middle points cross correlation （CMPCC ）gather which is processed as same as the reflection seismic method.We can get the 2D velocity structure from inversing dispersion cures in whole profile,it is well applied in the layering rock and soil strata.The elastic mechanics parameters,such as elastic module and poisson ratio,etc can be deduced by comparing the refraction tomography velocity with surface wave veolocity in the same profile,to supply the useful information in the next engineering geology exploration and design,rock and soil mechanics experiment in the laboratory as well.

关 键 词：多道面波勘探 折射波层析成像 原位岩土检测 弹性力学参数 

分 类 号：P631.4[天文地球—地质矿产勘探]