考虑土工格栅蠕变的加筋路堤变形分析

Deformation analysis on reinforced embankment taking into account of creep of geogrid

为了明确土工加筋材料蠕变对结构物变形的影响规律,基于有限差分数值分析方法,对不同工况条件下由土工格栅蠕变所造成的路堤加筋结构的变形进行分析。从加筋材料蠕变对路基顶面沉降、路基侧向位移以及土工格栅应变的影响等3个方面进行对比分析。结果表明:在不同工况条件下,土工格栅蠕变对加筋路堤结构物变形的影响显著;路基顶面沉降量、路基侧向位移和加筋材料蠕变应变与路基高度呈正比例关系,与边坡坡率、筋材弹性模量呈反比例关系。

In order to clear the reinforced structures＇ deformation law caused by creep of geosynthetics,the reinforced embankments under different working conditions were analyzed with finite difference method.The deformation of reinforced embankment caused by the creep of geogrid was presented.Three aspects,such as the settlement distribution on the top of the embankment,horizontal displacement of the embankment caused by the creep of geogrid,and geogrid strain were analyzed.The results show that the settlement distribution on the top of the embankment,the horizontal displacement of embankment,the geogrid strain have positively proportional relations with the height of embankment,and have inverse proportion relations with slop rate and elastic modulus of geogrid.3 tabs,6 figs,10 refs.