土工格栅加筋路堤影响因素研究

在野外修筑了4段连为一体的试验路堤.其中3段含土工格栅加筋层,格栅层间距各不相同,另1段没有加筋.用土压力盒测量了每段路堤底部的竖向土压力.在试验研究的基础上建立有限元模型,模型得到了试验数据的验证.用该有限元模型对土工格栅加筋路堤进行了计算分析,探讨了加筋层间距以及路堤土的内摩擦角、粘聚力和弹性模量等因素对加筋路堤沉降和应力分布的影响规律.

Research on Effecting Factors of Embankment Reinforced by Geogrid

An experimental embankment is constructed including 4 sections,three of which are reinforced by geogrid with different VS(vertical space between the adjoining reinforcement layers),the other is without reinforcement.The vertical earth pressures under each section of the embankment are measured by earth pressure cell.On the basis of the experimental study,a FEM model is presented,which is proved reasonable by the test data.Using this model,it is analyzed that the surface settlement and stress distribution of the reinforced embankment are how to be effected by the VS,and the internal friction angle,the cohesion and the modulus of the embankment soil.