海底土性原位测试影响因素分析

Analysis on Factors Affecting in-situ Testing of Properties of Marine Arine Sediment

对莺歌海海区的柱状样品的室内物理力学试验和现场原位测试结果进行对比研究，进行抗剪强度测试结果与采样深度、水深等指标的相关分析，指出原位测试结果的影响因素有取样深度、水深、剪切速率等，提出原位测试结果校正的几点建议。为原位测试结果的进一步应用作出了有意义的探讨。

Characterized by high water content, porosity and sensitivity, marine sediment is easily disturbed and loses water in the processes of transporting the samples and storing them. So, the results by measurement in lab tend to deviate from the true properties of the marine sediment. After comparing the results of mechanical property measured in lab and those tested in-situ on the core samples obtained from the sediment in Yinggehai Sea, we find that the drilling depth, water depth and shear velocity affect the results obtained by in-situ test. Several suggestion have been put forward to calibrate the mechanical results by in-situ test, which will contribute to further applying the methods of in-situ test to marine sediment.