软土路基土工隔栅加筋作用机理研究

A Study on Mechanism of Road Embankment Reinforced with Geogrids of Soft Subgrades

通过运用ANSYS有限元分析软件对软土路基土工格栅加筋的作用机理进行了数值模拟,研究了土工格栅加筋对软土地基应力场和位移场分布的影响.从计算结果分析可知,土工格栅堤底加筋对约束浅部地基土水平位移有显著作用,使最大水平位移点移向地基深处,使堤趾水平位移大幅减小,同时对竖向沉降有一定的均衡作用,加筋增强了路堤的整体性和稳定性,对地基承载力的提高也有一定作用.特别是加筋前后地表最大水平位移点的移位,对路堤填筑施工监测有一定借鉴意义.

A road embankment on soft subgrades reinforced with geogrids is analyzed with the finite element program ANSYS to study the influence of reinforcement with geogrids on displacement and stress field of soft subgrades. The calculation and analysis results indicate that the horizontal displacement of the top soft subgrids is decreased notably, and the location of the maximum horizontal displacement in the soft subgrids transfers to the deeper place by the reinforcement with geogids. It can also improve the stability and wholeness of embankment, especially the shift of the location of the horizontal displacement, and it is valuable to the inspection of the construction.