土工格网处理桥头跳车机理的有限元分析

Analysis of the Mechanism of Using Geonets to Treat the Bumping at the End of Bridge

通过非线性有限元计算分析 ,探讨了采用土工格网处理桥头跳车的机理 .结果表明 ,利用在台背锚固的土工格网张拉作用 ,可分层阻止填料顺台背的沉降 ;利用土工格网与填料之间良好的界面摩擦作用 ,改善土体内部的受力状态 ,提高土体的抵抗变形的能力 .并与现场检测资料对比 ,证明了这一方法的有效性 .

It is analyzed for the mechanism of using geonets to treat the bumping at the end of bridge by calculating using nonlinear finite element method. The results show that the tensioning action of geonets tied on the bridge's back wall can prevent the filling slide along the back wall layered; and the interfacial friction action between geonets and filling can change the stress distribution in the filling soil, increase the the filling soil's resistance to displacement. It is proved that placing geonets layered in the filling soil is one kind of methods valid to solve the bumping at the end off bridge by comparing with the results tested in site.