筒桩桩承式路堤土拱效应的三维数值模拟

发布时间：2018-06-19 11:51

本文选题：筒桩 + 桩承式路堤　；参考：《公路工程》2014年03期

【摘要】：考虑大直径薄壁筒桩所特有的大桩径、大桩距的特点,对筒桩桩承式路堤中的土拱效应进行了三维有限元数值模拟。重点分析了筒桩桩承式路堤中的竖向应力分布规律、大主应力方向以及土拱效应系数等反映土拱效应的变量,同时探讨了筒桩桩承式路堤中桩帽对土拱效应的贡献。计算结果表明,随着堆载高度的增加筒桩桩承式路堤中的竖向应力随深度非线性减小;大主应力方向平行于两相邻桩帽之间的圆拱连线,且桩帽的存在使土拱效应的发挥程度提高了40%之多。研究结果为工程应用提供了一定的理论基础。
[Abstract]:Considering the characteristics of large diameter and large distance of large diameter thin-walled cylindrical pile, the soil arch effect in the embankment supported by tube pile is numerically simulated by three dimensional finite element method. The vertical stress distribution law, the direction of large principal stress and the coefficient of soil arch effect are analyzed in detail, and the contribution of pile cap to soil arch effect in pile bearing embankment is also discussed. The results show that the vertical stress in the pile bearing embankment decreases nonlinearly with the depth with the increase of the heaped height, and the direction of the large principal stress is parallel to the circular arch line between the two adjacent pile caps. And the existence of pile cap increases the effect of soil arch by as much as 40%. The results provide a theoretical basis for engineering application.
【作者单位】：台州职业技术学院建筑工程学院;浙江大学;浙江大学滨海和城市岩土工程研究中心;
【分类号】：U416.12

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