土工格栅加固斜坡路堤的数值模拟

Numerical Simulations of Highway Embankment Reinforced by Geogrids

土工格栅具有强度高、延伸率低等特点,在路基适当位置铺设土工格栅可有效改善路堤应力环境,减小沉降和侧向变形。通过数值模拟方法研究了铺设土工格栅前后路堤水平位移、垂直位移的变化。计算结果表明,土工格栅对路堤的水平位移和垂直位移起到了较好的抑制作用,对水平位移的抑制作用更为明显;加筋层数对路堤变形的影响较小,多层加筋的效果和一层加筋相比并不明显。研究成果对路基工程设计具有一定的参考价值。

Geogrids have the advantage of high tensile strength and low elongation rate and they are widely used in the highway embankments to improve the pavement performance and reduce the settlement. Both the vertical and horizontal displacements in the embankment before and after the geogrid improvement are evaluated. The results indicate that the geogrid can provide a good limitation measure on both the vertical and horizontal deformations, especially, horizontal displacement. The number of reinforcement layers has limited role of limiting the vertical settlement.