摘要
三向土工格栅作为一种新型土工材料已广泛应用于工程实践中,但其理论研究相对落后于实践。通过大型直剪仪,研究了不同强度的单向土工格栅、双向土工格栅、三向土工格栅、玻纤土工格栅和土工布与砂土界面在直接剪切时的相互作用特性,对比分析了上述5种土工合成材料在不同法向应力及剪切速率下的摩擦性能。结果表明,三向土工格栅与砂土界面的剪应力随着剪切速率的增加而减小,在同一法向应力下,三向土工格栅的剪切应力值明显大于单向和双向土工格栅。
Three dimensional geo-grid is a new type of geo-synthetics that is widely used in engineering practices,but its theoretical study lags behind the engineering application.Research is carried out on interaction characteristics between sand-soil surface and one-dimensional geo-grid,two-dimensional geo-grid,three-dimensional geo-grid,geo-technical grille fiberglass,geotechnical fabric by laboratory direct shear tests,and the performances of the above geo-synthetics under different normal stress and shear rate are obtained.The results show that the shear stress of three-dimensional geo-grid decreases with increment of shear rate and the shear stress of three-dimensional geo-grid is significantly greater than that of one-dimensional geo-grid and two-dimensional geo-grid under the same normal stress.
出处
《人民长江》
北大核心
2012年第7期56-58,80,共4页
Yangtze River
关键词
三向土工格栅
界面直剪
剪切速率
土工合成材料
three-dimensional geo-grid
interface direct shear
shear rate
geo-synthetics
