OALib Journal期刊
石笼挡墙在振压下破坏机理的颗粒流模拟研究
, PP. 48-52
Keywords: 道路工程 ,破坏机理 ,颗粒流离散元 ,石笼挡墙 ,PFC2D
Abstract:
基于颗粒流离散元理论,对北京某山区公路采用的石笼挡墙建立PFC2D模型,研究墙背土压力的分布规律;在路面施工压实过程中石笼墙体的位移分布、破坏机理;模拟石笼挡墙的破坏过程和破坏方式,以及墙背土应力释放过程。通过模拟分析得出以下结论颗粒流离散元程序可以用于模拟挡墙结构物,并特别适用与模拟钢丝网等柔性结构;路基加压前后土压力分布规律与理论值基本相符;在路基的振动压实过程中,左侧石笼网最先达到抗拉强度而破坏,墙体丧失整体稳定性而逐步塌陷,形成堆积体,在靠近挡墙2m范围内路面轻微塌陷,路基土在第一层石笼体位置以上浅层内形成滑动面。
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