土工格栅与不同粒径填料界面作用特性试验研究  

Experimental Study on Interface Characteristics of Geogrid and Different Particle Size Fillers

作　　者：易富 王政宇 杜常博 李军 孟兴涛 YI Fu;WANG Zheng-yu;DU Chang-bo;LI Jun;MENG Xing-tao(School of Architecture and Transportation,Liaoning Technical University,Fuxin 123000,China;School of Civil Engineering,Liaoning Technical University,Fuxin 123000,China;School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]辽宁工程技术大学建筑与交通学院,阜新123000 [2]辽宁工程技术大学土木工程学院,阜新123000 [3]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《硅酸盐通报》2019年第8期2557-2562,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51774163);辽宁省教育厅科研基金(LJYL054);鞍钢科研项目(2018-科A19)

摘　　要：路基边坡加筋设计时,土工格栅与填料间的界面作用特性是影响加筋边坡工程安全与稳定的重要因素。为研究土工格栅与不同粒径填料的界面摩擦特性,进行了土工格栅与3种不同粒径均匀粗粒土的拉拔试验,分析了法向应力、填料粒径和拉拔速率3个因素对界面参数的影响。试验结果表明:土工格栅所受的最大拉拔力,随着填料粒径和拉拔速率的增大而增大,但填料粒径比拉拔速率的增幅大;不同粒径或不同拉拔速率下,格栅-土的界面最大剪应力与法向应力均呈线性拟合关系;填料粒径的增大显著提高了界面参数似黏聚力,但对似摩擦角变化不明显;拉拔速率的增大,使得界面参数似黏聚力几乎呈线性增长,而似摩擦角变化不明显。该试验结果对加筋边坡工程的设计具有一定的参考价值。The interface characteristics between geogrid and fillers is an important factor affecting the safety and stability of reinforced slope in the design of embankment slope reinforcement.In order to study the interface friction characteristics of geogrid and different particle size fillers,the pull-out test of geogrid and three kinds of average coarse-grained soils was carried out,and the normal stress,filler particle size and drawing rate were analyzed.The effect of factors on interface parameters.The test results show that the maximum drawing force of the geogrid increases with the increase of the particle size and the drawing rate,but the particle size is larger than the drawing rate;under different particle size or different drawing rate,the maximum shear stress and normal stress of grid-soil interface are linearly fitted.The increase of the particle size of the filler significantly increases the pseudo-cohesion of the interface parameters,but the change of the pseudo friction angle is not obvious.The increase of the drawing rate makes the pseudo-cohesion of the interface parameters seem to increase almost linearly,but the pseudo friction angle does not change significantly.The test results have certain reference value for the design of reinforced slope engineering.

关 键 词：界面作用特性 填料粒径 粗粒土 拉拔试验 

分 类 号：TU411[建筑科学—岩土工程]