长江科学院院报2017，Vol.34Issue(2)：41-44,4.DOI:10.11988/ckyyb.20160281
土工格栅与砂垫层界面力学特性试验研究
Experimental Investigation on Mechanical Behaviours of the Interface between Geogrid and Sand Cushion
摘要
Abstract
The interaction between soil and reinforcement is the fundamental cause of the strengthening of reinforced soil.It is also a key issue in the application of geosynthetic reinforced soils.In this article,the effects of normal stress,sand cushion thickness and spacing between transverse ribs on ultimate pullout resistance of reinforced body were analyzed through pullout test.The mechanical properties of reinforcement-soil interface were also revealed in a macro-sense.Results suggest that sand cushion of 5 cm thickness could remarkably enhance the ultimate pullout re-sistance of geogrid.The influence of sand cushion thickness on test result is more obvious under large normal stress. Moreover,the frictional angle of geogrid-soil interface decreases with the increasing of the spacing between trans-verse ribs;but the cohesion stays stable.The shape of geogrid is also an important factor affecting the properties of interface between reinforcement and soils.关键词
土工格栅/拉拔试验/加筋砂垫层/横肋间距/筋土界面参数Key words
geogrid/pullout test/reinforced sand cushion/spacing between transverse ribs/parameters of geogrid-soil interface分类
建筑与水利引用本文复制引用
张骏,林永亮,张波..土工格栅与砂垫层界面力学特性试验研究[J].长江科学院院报,2017,34(2):41-44,4.基金项目
国家自然科学基金项目 （）
