IODP Expedition 362 Vane shear strength (AVS)

Shear strength was measured on section halves using a GEISA automated vane shear (AVS) frame and device controller. The device is suitable for sediment not affected by cementation (i.e., saturated, clay-rich, soft sediment). Shear strength measurements should be considered only approximate, particularly because the influence of pore pressure changes during the undrained experiment cannot be estimated. Report includes vane shear strength at the sample's failure point, maximum torque angle, penetration direction, and rate of vane rotation.采用GEISA自动十字板剪切（automated vane shear, AVS）架与配套设备控制器，对试样剖分半样开展抗剪强度测试。该设备仅适用于未受胶结作用影响的沉积物，即饱和、富黏土质软沉积物。抗剪强度测试结果仅可视为近似值，尤其因不排水试验过程中孔隙压力变化的影响无法估算。本次测试报告包含试样破坏点处的十字板抗剪强度、最大扭矩角、贯入方向及十字板旋转速率。