中文摘要：

基于施工或外部荷载造成的岩（土）坡体滑动现象,以滑动面为界,对山区高陡边坡桥梁基桩荷载进行合理简化：将桩顶处的上部荷载分解成竖向与横向荷载共同作用,桩后岩质边坡滑坡体推力按抛物线分布,而桩前岩（土）体抗力稳定段呈线性分布,滑动面以下地基比例系数k服从（mz＋C）的线性增长规律,在此基础上,计入桩顶P-△效应的影响,采用矩阵计算方法,得到高陡边坡桥梁基桩内力分析计算的幂级数解.理论解与现场实测数据的对比结果表明,桩身弯矩的相对误差基本在15%以内,且最大弯矩的误差仅为6%,故基桩内力分析的幂级数解合理、可靠,可满足工程设计的需要.

英文摘要：

Based on the slope landslide caused by construction or load the slide-plane was made as interface, the load of bridge pile in steep slope was simplified rationally： the load on pile top was decomposed into vertical and horizontal load; the law of landslide-thrust behind obeyed parabola distribution; the resistance above slide-plane obeyed linear distribution and the foundation coefficient satisfied （mz＋C）. Then, P-△ effects was considered, and the power-progress solution was deduced by matrix analysis method. The results show that the relative error of bending moment along pile is under 15%, the biggest bending moment＇s relative error is 6% only, so the power-progression solution of pile inner force calculation is feasible and rational, which can satisfy the need of engineering design.