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Vibrocoring in marine ground investigation
If only shallow marine ground geotechnical information is essential for design purpose, vibrocoring is certainly a good choice for sampling disturbed samples. In vibrocoring a core barrel and an inner liner generally of 100mm diameter and 6m long are vibrated into the seabed.
Because the installation of vibrocoring includes the vibration of barrels there is considerable disturbance of recovered samples. Vibrocoring has the merit of fast speed of sample recovery (for instance up to 14 cores can be obtained in one day). Furthermore the cost of vibrocoring operation is low when compared with other viable marine geotechnical investigation options.
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