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Introduction of Offshore In-situ Vane Shear Test

YAO Shou-long;ZHENG Xi-yao;China Oilfield Services Limited;  
Offshore in-situ vane shear test can obtain the in-situ soil shear strength of seabed and the results from the test have been successfully applied in the engineering practice.Herein,principle of in-situ vane shear test,types of equipment used,testing mechanism,technical requirements for the test,factors influencing the test,principle of data processing in the laboratory and actual engineering applications are introduced.It can be summarized that to do the offshore in-situ vane shear test should be strictly in accordance with the technical requirements and know well the factors influencing the tested results.The undrained shear strength of cohesive soils thus obtained can be used for the actual engineering design and provide reliably geotechnical design parameters.
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