微型十字板在海洋软土中的应用

Application of Miniature Vane in Seabed Soft Soil

通过微型十字板在海洋勘察现场对从钻孔中取出的土样立即进行剪切试验,得出大量的海底软土的微型十字板剪切强度,与实验室土工试验数据及原位测试数据进行对比分析,发现微型十字板剪切强度与土的物理力学指标线性拟合较好,有较高的相关性;与十字板剪切指标具有较高的一致性。分析得出微型十字板数据可靠,可作为海洋工程勘察中一种半原位测试仪器使用,为缺少原位测试的海洋工程建设服务。

Miniature vane was used in shear testing of seabed soft soil,which was obtained from drillingholes of ocean exploration scene. Abundant of miniature vane-shear strength results were got from seabedsoft soil testing. These strength testing results were compared with laboratory geotechnical results,and itwas found that miniature vane strength data fitted well with laboratory testing results in linear relationship.Meanwhile,shear strength measured by miniature vane showed great consistent with the data obtained fromin-situ vane shear testing. Related analyzing results showed that data obtained from miniature vane was reli-able;miniature vane could be used as a semi-in-situ test instrument in ocean exploration scene,and alsoin oceaneering situations where in-situ testing instruments were lack.