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土工格栅加筋挡土墙是一种柔性挡土结构,目前尚未建立较严密的设计方法,作用在土工格栅加筋墙壁上的地震动土压力研究是抗震设计的重要内容之一。应用基于拉格朗日法的完全非线性动有限差分法研究整体面板式土工格栅加筋土挡壁在地震作用下各设计参数对挡壁动土压力的影响。采用弹塑性模型模拟填土,采用耦合弹性参数描述格栅与土接触界面特性,参数包括加筋间距、长度、刚度、地震强度和填土性质等,分析墙壁的动土压力沿墙身的分布特征,得出了影响地震动土压力的显著参数,证明了土工格栅加筋墙体的优异吸震能力,研究结果为整体面板式土工格栅加筋土挡墙抗震设计中的动土压力研究提供参考。
Geogrid Reinforced Retaining Wall is a kind of flexible retaining structure. At present, no rigorous design method has been established. The study of earth pressure acting on geogrid reinforced walls is one of the important contents of seismic design. The influence of various design parameters on the earth pressure of retaining wall under the action of earthquake is studied by using the completely nonlinear dynamic finite difference method based on Lagrange method. The elasto-plastic model is used to simulate the filling of soil. The coupling elastic parameters are used to describe the characteristics of the interface between the grid and the soil. The parameters include the spacing, length, stiffness, seismic intensity and filling properties of the soil. , And obtained the significant parameters that influence the earth pressure caused by earthquakes and proved the excellent shock absorption capacity of the geogrid reinforced walls. The results provide a reference for the study of earth pressure in the seismic design of the geogrid-reinforced geogrid reinforced by the whole panel.