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http://dx.doi.org/10.5762/KAIS.2014.15.3.1778

Analysis on the efficiency of underwater SPT module and stability for seabed type geotechnical investigation equipment  

Kim, Woo-Tae (Coastal Engineering and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Jang, In-Sung (Coastal Engineering and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Ko, Jin-Hwan (Coastal Engineering and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Shin, Chang-Joo (Coastal Engineering and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Kwon, O-Soon (Coastal Engineering and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Lee, Seung-Hyun (Dept. of Civil engineering, Sunmoon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.3, 2014 , pp. 1778-1785 More about this Journal
Abstract
In order to construct offshore structures safely, geotechnical investigation should be carried out with high accuracy. Up to now, onshore geotechnical investigation equipments installed on the barge are used for offshore geotechnical investigation. In this case, many limitations can be confronted such as deep water depth, high wave, strong current, severe wind and so on. For the safe and economic offshore geotechnical investigation with high precision, a seabed type unmanned automated site investigation equipment is developed. It can be operated remotely underwater conditions with 100m water depth and can explore the ground depth of 50m. Also, the standard penetration test (SPT), soil boring, soil sampling and rock coring can be possible using the equipment. Numerical analysis was conducted to secure the stability of the equipment against current of 4 knot. Energy efficiency of SPT apparatus which is attached to the equipment shows 78% in average.
Keywords
Offshore structures; Geotechnical investigations; Seabed type; SPT (Standard Penetration Test); Soil boring; Soil sampling; Rock coring;
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