| 横坡段桥梁双桩结构内力和位移计算 |
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| 引用本文： | 王应斌,杨志勇,周志军.横坡段桥梁双桩结构内力和位移计算[J].路基工程,2018,0(4):45-53. |
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| 作者姓名： | 王应斌 杨志勇 周志军 |
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| 作者单位： | 1.云南省交通运输厅工程质量监督局, 昆明 650214 |
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| 摘 要： | 针对横坡段桥梁双桩基础，引入陡坡效应，并对桩侧边坡下滑推力和桩侧岩土体抗力进行合理简化，建立基于前后桩各特征桩段结构和受荷特点的挠曲微分方程。采用幂级数法对方程求解，考虑桩顶和桩端的边界条件及各特征桩段之间内力和位移的连续性条件。通过对某双桩工程实例进行理论和有限元计算和分析，得出该理论方法具有一定的可靠性及设计的合理性。分析结果表明:理论计算和有限元计算的最大相对误差为3.32%，且理论计算的前后桩桩顶水平位移为8.573 mm，有限元计算的前后桩桩顶水平位移为8.867 mm，二者均满足规范要求。
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| 关 键 词： | 桥梁工程 横坡 双桩结构 陡坡效应 内力位移计算 |
| 收稿时间： | 2019-11-12 |
Calculation of Internal Force and Displacement of Bridge Double Pile Structure in Cross Slopes |
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| Abstract: | Based on the bridge double pile foundation in cross slopes, the steep slope effect is introduced, the sliding thrust of the pile side slope and the resistance of the pile side rock and soil mass are simplified and the flexural differential equation based on pile structure and load characteristics of front and rear pile is established. The equations are solved by power series method, considering the boundary conditions of pile top and pile end and continuity conditions of internal force and displacement between the characteristic pile sections. Based on a double pile engineering theory and finite element calculation and analysis, the theoretical method has certain reliability and the rationality of the design. The analysis indicates that, the maximum relative error of the theoretical calculation and finite element calculation is 3.32%, the horizontal displacement of pile top for the theoretical calculation is 8.573 mm and for finite element calculation is 8.867 mm, both of which meet the requirements of specification. |
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