An innovative application of borehole acoustic image and amplitude logs for geotechnical site investigation

Acta Geophysica

article

Kao, Hsien-Chang¹  Chou, Po-Yi²  Lo, Hung-Chieh² 

[1] Department of Civil Engineering, National Taiwan University;Geotechnical Engineering Research Center, Sinotech Engineering Consultants, Inc.

关键词: Acoustic image;    Conductive fractures;    Straddle-packer test;    Geotechnical investigation;   

DOI  :  10.1007/s11600-020-00493-2

学科分类：地球科学(综合)

来源: Polska Akademia Nauk * Instytut Geofizyki

【 摘 要 】

Down-hole acoustic televiewer (ATV logging) is a geophysical well-logging device known to be able to reveal underground in-depth image. However, reviewing the current developments in the area of geotechnical engineering, ATV logging data were predominantly used for the purpose of visualizing and calculating the specific structural features in an open borehole, and nothing more. Noticeably, to the majority of engineering applications, it appears that ATV logging played a minor role compared to other geophysical borehole logging tools. Our study does not take it for granted. A systematic study is presented of the significance and consequent applications of ATV logging. The significance of correlation between acoustic amplitude and different geotechnical parameters is discussed and found to be consistent with previous findings. The result tells that ATV logging is actually able to provide timely and ground-truth information during site characterization, if properly used. Additionally, in our study, a simple rock mass evaluation index, Aco-RQD, is proposed, which is applicable to all aspects of geotechnical engineering as long as the continuous ATV logging data are available.

【 授权许可】

Unknown