土工格栅处理拓宽路堤不均匀沉降有限元仿真

采用AD INA非线性有限元分析软件,对土工格栅处理武黄高速公路武汉市三环线共线段拓宽路堤变形和应力进行仿真计算和分析,对土工格栅处理拓宽路堤不均匀变形的作用效果进行分析.结果表明,土工格栅对减小路堤不均匀竖向附加变形、侧向位移以及基底不均匀附加应力有显著效果,为拓宽设计提供了理论依据.为了检验仿真效果,拟进行工后路堤变形跟踪观测,对不同高路堤分别布置沉降观测点,利用实际观测结果对计算模型进行验证和修正,为该仿真成果推广应用积累经验,并作进一步研究之用.

Simulation on Treating Uneven Settlement of Widening Roadbed With Geogrids Based on Finite Element Method

Nonlinear finite element software ADINA was used to simulate the uneven settlement treatment of widening roadbed of mutual segment of Wuhan-Huangshi highway and the third annular urban road of Wuhan with geogrids.The effect of treating uneven settlement of widening roadbed with geogrids was studied.Analysis conclusions show that the effect of treating with geogrids is prominent in reducing uneven settlement of widening roadbed,horizontal displacement and additional uneven stress at the bottom of roadbed.Analysis conclusions also provide theoretic foundations for widening road designing.The observing will be kept on the settlement of the roadbed after construction to verify the effect of emulation and dispose settlement observation points along the transects of 2 m,4 m and 6 m height roadbeds.Then the simulation model is validated and be modified.The data of observation can be used for further studies.