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。
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.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第3期561-566,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(50578060)
湖南省自然科学基金资助项目(E60D050)
关键词
高陡边坡
桥梁基桩
内力位移
幂级数解
steep slope
bridge pile
inner-force
power-progression solution
