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http://dx.doi.org/10.14481/jkges.2014.15.9.37

Scour Monitoring for Offshore Foundation using Electrical Resistivity and Shear Wave Tomography  

Park, Kiwon (School of Civil, Environmental and Architectural Engineering, Korea University)
Lee, Jongsub (School of Civil, Environmental and Architectural Engineering, Korea University)
Choi, Changho (Korea Institute of Construction Technology)
Byun, Yonghoon (School of Civil, Environmental and Architectural Engineering, Korea University)
Publication Information
Journal of the Korean GEO-environmental Society / v.15, no.9, 2014 , pp. 37-45 More about this Journal
Abstract
An embedded length of monopile caused by a scouring should be evaluated to monitor the stability of offshore foundations, because offshore foundations are affected by horizontal load. The objective of this study is to evaluate the scouring around offshore foundation by using electrical resistivity and to estimate ground stiffness by using shear wave tomography. The electrical resistivity profiles and shear wave tomography were measured according to the scour depth of model ground prepared with sand and cement. Several electrodes and bender elements were used to measure the electrical resistivity and shear waves, respectively. The electrode sets are attached on the monopile surface and bender elements are arranged in $7{\times}7$ arrays by using nylone frames. The electrical resistivity profiles and shear wave tomography are acquired by laboratory experiment. Maximum scour depth was estimated by electrical resistivity profiles and the ground stiffness of model ground was estimated by shear wave tomography. This study suggests that the electrical resistivity profiles and shear wave tomography may be useful for monitoring the stability of the offshore foundations.
Keywords
Electrical resistivity; Monitoring; Monopile; Scour; Shear wave tomography;
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Times Cited By KSCI : 2  (Citation Analysis)
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