高大土工格栅加筋土挡墙有限元分析

FINITE ELEMENT ANALISIS OF HIGH GEOGRID REINFORCED EARTH RETAINING WALL

加筋土挡墙常用于深挖高填的边坡工程,已有不少相关成果的研究。文中依托浙江某20m单级加筋土挡墙工程,采用数值模拟方法,分析高大加筋土挡墙的水平位移分布规律。研究结果表明,高大加筋土挡墙呈“鼓肚状”变形,水平位移在墙面中部达到最大,上下两端最小;宜增大底部的土工格栅的刚度来限制挡墙的水平位移;格栅间距过大会产生较大的位移,间距过小会导致“超筋”现象,为这类工程提供参考。

Reinforced earth retaining wall is often used in deep excavation and high filling side slope engineerings.Relevant research has yielded many results.Based on a 20-meter single stage reinforced soil retaining wall project in Zhejiang Province,the horizontal displacement distribution of a tall reinforced soil retaining wall is analyzed us⁃ing numerical simulation methods.The results indicate that the tall reinforced soil retaining wall exhibits a bulge shaped deformation,with the horizontal displacement reaching its maximum in the middle of the wall and the mini⁃mum at the upper and lower ends.It is advisable to increase the stiffness of the bottom geogrid to limit the horizontal displacement of the retaining wall.Excessive space between grids causes significant displacement,while too small space leads to the phenomenon of over reinforcement.