部分排水条件下加筋路堤性状分析

使用椭圆帽土质模型分析了部分排水条件下软土地基土工合成物加筋路堤的性状,按照Biot理论模拟了固结行为。在路堤施工期地基土的部分固结和不同初始排水条件下,主要分析加筋体的刚度影响和地基土的强度轮廓面,以及在正常工作情况下和在路堤失效情况下土工合成加筋材料的应变特点。分析了加筋体对于地基土变形的影响。结果显示,加筋体可以提高路堤的破裂高度,可以明显地减小路堤施工期最大侧向变形、竖向变形和地基土隆起,可明显提高施工期路堤的安全系数。

Analysis of reinforced embankments under partially drained conditions

The behavior of geo-synthetic reinforced embankments constructed on soft cohesive foundations under partially drained conditions is analyzed using an elliptical cap soil model.Consolidation is simulated by Biot theory.The effects of reinforcement stiffness and strength profile of foundation soil under partial consolidation of the foundation soil and foundation soil with different initial drainage conditions during embankment construction,as well as the characteristics of strain of the geo-synthetic reinforcement under conditions of working and embankment failure,are discussed in the paper.The effect of reinforcement on the deformation of the foundation soil is evaluated and it is shown that reinforcement can significantly increase the embankment failure height and reduce the maximum lateral deformation,vertical deformation and foundation soil heave during embankment construction.For the conditions examined,partial drainage during construction provides and increase in the factor of safety against failure of reinforced embankments.