变截面抗滑桩内力计算方法及变形特性研究
Study on internal force and deformation characteristics of variable section anti-slide piles
金晨 1吴飞林 2喻文亮1
作者信息
- 1. 江西省地质局 地理信息工程大队,江西 南昌 330000
- 2. 江西省地质局 第一地质大队,江西 南昌 330000
- 折叠
摘要
针对抗滑桩所用悬臂法在滑动面处上下位移不连续问题,选取圆形抗滑桩作为研究对象,考虑变径比、变径位置及桩间距等因素的影响,对变截面抗滑桩内力及变形特性进行研究.将桩在滑动面以下部分视为Winkler弹性地基梁,采用幂级数法推导变截面抗滑桩锚固段的内力计算公式,并用Matlab编写全桩段内力计算程序,可视化分析了变截面抗滑桩全桩段在不同因素影响下内力变化的结果.结果表明:将上部桩视为弹性定向铰支的悬臂梁,可使得桩身位移在滑面处连续;在相同剩余抗滑力的作用下,变截面抗滑桩变形特性受变径比、变截面位置和桩间距等因素影响.
Abstract
Aiming at the problem of the displacement of the up-and-down displacement of the anti-slide pile used in the sliding surface,the circular anti-slide pile is selected as the research object.Considering the influence of factors such as reduction ratio,variable diameter position and pile spacing,the internal force and deformation characteristics of variable cross-section anti-slide piles are studied.The pile below the sliding surface is regarded as the"Winkler"elastic foundation beam,and the variable series resistance is derived by the power series method.The internal force calculation formula of the anchorage section of the slide pile is used,and the internal force calcu-lation program of the whole pile section is compiled by Matlab.The results of the internal force change of the whole section of the variable section anti-slide pile under different factors are analyzed visually.The results show that the upper pile is regarded as the cantilever beam with elastically oriented hinge,which can make the displacement of the pile body continuous at the sliding surface.Under the same residual anti-sliding force,the deformation charac-teristics of the variable-section anti-slide pile are subject to variable diameter ratio and change.Factors such as the position of the section and the spacing of the piles affect each other.
关键词
边坡工程/抗滑桩/变截面/内力计算/承载特性Key words
slope engineering/anti-slide pile/variable cross section/internal force calculation/bearing characteris-tics引用本文复制引用
基金项目
国家自然科学基金地区科学基金(51968023)
出版年
2024
NETL
NSTL
维普
万方数据