土工格栅加筋高液限土路堤的稳定性研究

摘要

The constitutive model of soil is established by Plaxis,and the control variable method is used to analyze the stability factors,such as the role of tendon-soil interface,reinforced pitch,reinforced position and so on .Some useful conclusions are drawed:the better the soil’s quality and reinforcement stiffness,the better are the reinforcement effect and embankment stability;the stability of bottom reinforcement is obviously better than that of the middle and upper;the reinforcement encryption can not effectively improve the stability of embankment .Through the field tests of a highway in Guangdong,it is proved that the optimized design could reduce the surface subsidence and deep horizontal displacement effectively,and also improve the stability of embankment .%运用Plaxis软件,建立土体本构模型,采用控制变量法分析筋土界面作用、加筋间距、加筋位置等对高液限土路堤稳定性的影响.得出结论:土质越好,筋材刚度越大,加筋效果越明显,加筋路堤也越稳定；底部加筋的稳定性明显高于中部和上部加筋；格栅加密不能有效提高加筋路堤的稳定性.通过广东某高速公路现场加筋试验研究,验证了优化的加筋设计能较好降低高液限土路堤的表面沉降和深层水平位移,提高路基的稳定性.