一种测试海底泥流强度的新型全流动贯入仪  

A New Full-Flow Penetrometer for Strength Test of Submarine Mud Flow

作　　者：范宁[1] 赵维[1] 年廷凯[1,2,3] 吴昊[1] 鲁双[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]青岛海洋地质研究所国土资源部海洋油气资源与环境地质重点实验室,山东青岛266071 [3]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《上海交通大学学报》2017年第4期456-461,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金(51579032);国土资源部海洋油气资源与环境地质重点实验室基金(MRE201304);深部岩土力学与地下工程国家重点实验室基金(SKLGDUEK1307)资助项目

摘　　要：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 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 con- tent. 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 lOOg centrifuge model tests and lg conventional gravity experi ments, 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.

关 键 词：海底泥流 全流动测试原理 不排水剪切强度 

分 类 号：TU411[建筑科学—岩土工程]