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Estimating the shear wave velocity structure above the fresh bedrock based on small scale microtremor observation array

文献类型：期刊论文

作者Tian, Baoqing4,5; Du, Yanan3; Jiang, Huazhong2; Zhang, Ruohan1; Zhang, Jiangjie4,6
刊名BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
出版日期2020-08-01
卷号79期号:6页码:2997-3006
ISSN号1435-9529
关键词S-wave velocity structure Sediments Weathered strata Fresh bedrock Surface wave method based on passive source (microtremor)
DOI10.1007/s10064-020-01761-7
英文摘要S-wave velocity and thickness of weathered strata are the important parameters to engineering construction. In this study, array measurements of microtremors were carried out at 50 sites in Jimo, China. It revised the observation array that a small scale array was placed in the center of traditional regular triangle observation array. The field data of Jimo verified that it is effective to identify the different degrees of weathered strata above fresh bedrock. Based on the spatial autocorrelation (SPAC) method, the dispersion curves were achieved. While the S-wave velocity structure was estimated using the fork genetic algorithm. By using small scale observation array, it identifies different strata including weathered layer in detail. In order to test the accuracy of inversion results, 5 sites were chosen to drill. Comparison between inversion results and boreholes, it shows agreement with logs data. At last, the S-wave velocity structures in different depths above the fresh bedrock were plotted. We delineated the S-wave velocity structure for the first time in this research region using revised measurement of microtremors signal. The depth of fresh bedrock fluctuates strongly which is affected by weathered. This method provides another means to distinguish the degree of weathered, depth of fresh bedrock, and S-wave velocity structure of shallow strata.
WOS关键词H/V SPECTRAL RATIO ; JOINT INVERSION ; SEISMIC NOISE ; BASIN ; SHALLOW ; DISPERSION ; RECORDINGS ; RESONANCE ; CURVES ; TAIWAN
WOS研究方向Engineering ; Geology
语种英语
出版者SPRINGER HEIDELBERG
WOS记录号WOS:000548716200017
源URL[http://ir.iggcas.ac.cn/handle/132A11/97203]  
专题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
通讯作者Tian, Baoqing
作者单位1.Harbin Inst Technol, Harbin 150001, Heilongjiang, Peoples R China
2.Sinopec Petr Engn Geophys Co Ltd, Southwest Branch, Deyang 618000, Sichuan, Peoples R China
3.China Xiongan Grp, Xiongan 071700, Hebei, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 10002, Peoples R China
推荐引用方式
GB/T 7714		 Tian, Baoqing,Du, Yanan,Jiang, Huazhong,et al. Estimating the shear wave velocity structure above the fresh bedrock based on small scale microtremor observation array[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020,79(6):2997-3006.
APA Tian, Baoqing,Du, Yanan,Jiang, Huazhong,Zhang, Ruohan,&Zhang, Jiangjie.(2020).Estimating the shear wave velocity structure above the fresh bedrock based on small scale microtremor observation array.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,79(6),2997-3006.
MLA Tian, Baoqing,et al."Estimating the shear wave velocity structure above the fresh bedrock based on small scale microtremor observation array".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 79.6(2020):2997-3006.

入库方式： OAI收割

来源：地质与地球物理研究所

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