路堤加筋土拉拔稳定性试验研究

Experimental study on drawing stability of reinforced soil of embankment

为研究加筋路堤中加筋土的稳定特性,利用拉拔试验箱设计了不同垂直荷载条件下三种不同类型土工格栅与砂土的摩擦性能试验,并得出了拉拔位移与摩擦阻力的关系曲线。研究结果表明:相同垂直荷载下,不同类型的土工格栅与砂土的摩擦阻力有所不同,表现为EG3030>EG90R>TGDG80;拉拔试验界面摩擦特性τ-L曲线呈非线性关系。起初,垂直荷载不同的情况下,当拉拔位移小于5 mm时,τ-L曲线呈线性关系,拉拔位移和垂直荷载逐渐增大后,曲线明显地呈非线性关系,拉拔力的峰值对应的位移量也有相同的趋势。

In order to study the stability characteristics of reinforced soil in reinforced embankment,the friction performance test of three different types of geogrid and sand under different vertical load conditions was designed by using the drawing test box,and the drawing displacement and frictional resistance and the relationship curve were obtained.The results show that under the same vertical load,the frictional resistance of different types of geogrid and sand is different,which is EG3030>EG90 R>TGDG80;the frictional characteristicτ-L curve of the drawing test is nonlinear.At first,when the vertical load is different,when the pull displacement is less than 5 mm,the τ-L curve has a linear relationship.After the pull displacement and the vertical load gradually increase,the curve is obviously nonlinear,and the peak of the pull force corresponds.The amount of displacement also has the same trend.