一种测试海底泥流强度的新型全流动贯入仪

针对当前缺乏低强度、高含水率的海底泥流强度的有效测试技术这一现状,基于全流动的测量机制,开发了一种新型全流动贯入仪;通过对仪器构造和测力元件的全面改进,实现不排水剪切强度、不同扰动程度下残余强度等参数的有效测量.通过在100g离心模型实验和1g常规重力实验条件下的不排水剪切强度测试,验证了新型全流动贯入仪的可靠性和稳定性;将开发的新型全流动贯入仪应用于模拟细粒土海底滑坡形成的海底泥流的循环强度测试中,取得了较好的效果.

A New Full Flow Penetrometer for Strength Test of#br#Submarine Mud Flow

A new full flow penetrometer is proposed based on the full flow testing mechanism, since there is a lack of proper strength test devices of submarine mud flow with low strength and high moisture content. The instrument structures and load measuring elements are significantly improved to effectively measure the undrained shear strength, residual strength with different disturbing degrees. Verifications are also carried out by comparisons of the strength values obtained from the new full flow penetrometer and the routine one under the condition of 100g centrifuge model tests and 1g conventional gravity experiments, respectively. The results show that the working performance of new penetrometer is reliable and stable. Also, the new device is successfully used to measure the cycling strength of seafloor mud flow formed by fine grained simulation soil submarine slide.