• 首页 | 期刊简介 | 编委会 | 投稿须知 | 下载专区 | 联系我们 | English
谢宝琎*,张向东,杜常博.不同含水率下尾矿与土工格栅界面特性的试验研究[J].实验力学,2018,33(1):127~133
不同含水率下尾矿与土工格栅界面特性的试验研究
Experimental study of interface characteristics between geogrid and tailings with different water contents
投稿时间: 2016-11-01  最后修改时间: 2016-12-05
DOI:10.7520/1001-4888-16-230
中文关键词:  含水率  似粘聚力  似摩擦角  似摩擦系数
英文关键词:water content  pseudo-cohesion  pseudo friction angle  pseudo-friction coefficient
基金项目:国家自然科学基金委员会-神华集团有限公司煤炭联合基金资助(51174268)
作者单位
谢宝琎* 1.辽宁工程技术大学土木与交通学院 辽宁阜新 123000 2.中国中铁七局集团第三工程有限公司 陕西西安 710032 
张向东 辽宁工程技术大学土木与交通学院 辽宁阜新 123000 
杜常博 辽宁工程技术大学土木与交通学院 辽宁阜新 123000 
摘要点击次数: 52
全文下载次数: 
中文摘要:
      含水率是影响尾矿加筋结构稳定性的重要因素。通过室内拉拔试验,对不同含水率(1.5%、 9.7%、 19.3%)下尾矿与土工格栅的界面特性进行了研究。结果表明,土工格栅的最大剪应力与法向应力呈线性相关,能够反映筋-尾矿界面参数似粘聚力和似摩擦角;似粘聚力随含水率增大先增大后减小,似摩擦角随含水率增大先减小后增大;在含水率增大过程中存在界限含水率,大小约为10%;在界限含水率下,似粘聚力达到最大值,似摩擦角达到最小值;似摩擦系数随法向应力增大呈非线性递减,可以二次抛物线拟合反映二者关系;在不同含水率条件下,似摩擦系数随含水率增大呈现先增大后减小规律,与对应界面参数似粘聚力的变化一致。上述试验分析成果对应用土工格栅进行尾矿坝加筋设计有一定的指导价值。
英文摘要:
      Water content is an important factor to influence the stability of tailings reinforced structure. Through indoor drawing experiment, the interface characteristics between tailings and geogrid were studied under the condition of different water contents of tailings(1.5%, 9.7%, 19.3%). Results show that the maximum shear stress and normal stress of geogrid are linearly related, which can reflect that geogrid-tailings interface parameter is similar to pseudo-cohesion and pseudo-friction angle. With the increase of water content, pseudo-cohesion increases first and then decreases; and with the increase of water content, pseudo-friction angle also decreases first and then increases. During the process of water content increase, there is a water ratio limit of about 10%. Under the water ratio limit condition, pseudo-cohesion reaches the maximal value, pseudo-friction angle reaches the minimum value. Pseudo-friction coefficient decreases nonlinearly with the increase of normal stress, which shows that the relationship between them can be fitted by second-degree parabola. Under the condition of different water content, with the increase of water content, pseudo-friction coefficient increases first and then decreases, which is consistent with pseudo-cohesion variation of corresponding interface parameters. Above results have certain guiding value for tailings dam reinforcement design using geogrid.
查看全文  查看/发表评论  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 1354315 位访问者,今日一共访问283次,当前在线人数: 38
技术支持:本系统由北京勤云科技发展有限公司设计