Estimation of Penetration Depth Using Acceleration Signal Analysis for Underwater Free Fall Cone Penetration Tester KCI

Title
Estimation of Penetration Depth Using Acceleration Signal Analysis for Underwater Free Fall Cone Penetration Tester
Author(s)
Seo, Jungmin; Shin, Changjoo; Kwon, Osoon; Jang, In Sung; Kang, Hyoun; Won, Sung Gyu
KIOST Author(s)
Seo, Jung Min(서정민)Kwon, O Soon(권오순)Jang, In Sung(장인성)Kang, Hyoun(강현)
Alternative Author(s)
서정민; 신창주; 권오순; 장인성; 강현
Publication Year
2020-06
Abstract
A track-type underwater construction robot (URI-R) was developed by the Korea Institute of Ocean Science & Technology. Because URI-R uses tracks to move on the seabed, insufficient ground strength may hinder its movement. For smooth operation of URI-R on the seabed, it is important to determine the geotechnical properties of the seabed.

To determine these properties, standard penetration test (SPT), cone penetration test (CPT), and sampling are used on land. However, these tests cannot be applied on the seabed due to a high cost owing to the vessel, crane, sampler, and analysis time. To overcome these problems, a free fall cone penetration tester (FFCPT) is being developed.

The FFCPT is a device that acquires the geotechnical properties during impact/penetration/finish phases by free fall in water. Depth information is crucial during soil data acquisition. As the FFCPT cannot measure the penetration depth directly, it is estimated indirectly using acceleration. The estimated penetration depth was verified by results of real tests conducted on land.
ISSN
1225-0767
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/20991
DOI
10.26748/ksoe.2019.076
Bibliographic Citation
한국해양공학회지, v.34, no.3, pp.202 - 207, 2020
Publisher
한국해양공학회
Keywords
Free fall cone penetration tester; Geotechnical properties; Penetration depth; Acceleration; Acceleration integration
Type
Article
Language
English
Publisher
한국해양공학회
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