成层土体界面抗剪强度试验研究  

Experimental Study on Interfacial Shear Strength of Stratified Soils

作　　者：许国辉[1,2] 房虹汝 张春艳[1,2] 胡光海[3] 周勇华 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100 [2]海洋环境与生态教育部重点实验室,山东青岛266100 [3]国家海洋局第一海洋研究所,山东青岛266061 [4]青岛环海海洋工程勘察研究院,山东青岛266033

出　　处：《海岸工程》2015年第1期11-19,共9页Coastal Engineering

基　　金：国家自然科学基金--粉质土海底波致粉砂流及其运动特性研究--以黄河水下三角洲为例(41076021);国家海洋局海洋公益性行业科研专项--近海海底地质灾害预测评价及防控关键技术研究(201005005-6)

摘　　要：基于在自行设计的土体界面抗剪强度测定装置中进行的室内试验结果,对不同含水率、不同黏粒质量分数、不同剪切速率下成层土体的界面抗剪强度及界面摩擦力进行了研究。结果表明:在工况相同的条件下,当黏粒质量分数较低时,成层土体间的界面抗剪强度及界面摩擦力随着黏粒质量分数的增加而增大;当黏粒质量分数较高时,成层土体间的界面抗剪强度及界面摩擦力随着黏粒质量分数的增加而减小。成层土体间的界面抗剪强度及界面摩擦力随着含水率的增加而减小。当改变剪切速率时,成层土体间的界面抗剪强度随着剪切速率的增加而增大,但界面摩擦力几乎无变化,保持在一个稳定状态。Based on the laboratory tests carried out with a self-designed device for measuring soil interfacial shear strength,the interfacial shear strength and the interfacial friction of the stratified soils with different clay content,water content and shear rate are studied.The results show that when it comes to the same conditions,between the stratified soils with a lower clay content the interfacial shear strength and the interfacial friction increase with the clay content,whereas between those with a higher clay content the interfacial shear strength and the interfacial friction decrease with the clay content.The interfacial shear strength and the interfacial friction between the stratified soils decrease with the increase of water content.When the shear rate of the stratified soils changes the interfacial shear strength increases with the shear rate,but the interfacial friction varies little.

关 键 词：黏粒质量分数 含水率 剪切速率 抗剪强度 摩擦力 

分 类 号：TV221.2[水利工程—水工结构工程]