基于Spencer法的抗滑桩加固边坡地震稳定性分析
Seismic Stability Analysis of Stabilizing Piles Reinforcement of Soil Slope Based on Spencer Method
魏孔春 1毛忠良 1李绍红 2时洪斌1
作者信息
- 1. 中铁第五勘察设计院集团有限公司,北京 102600
- 2. 西南交通大学,成都 610031
- 折叠
摘要
针对抗滑桩加固边坡地震稳定性分析问题,根据拟静力分析和极限平衡理论,提出抗滑桩加固边坡地震稳定性分析的扩展Spencer法,得到桩身剪力与边坡稳定系数之间的关系曲线,进而确定满足指定稳定性设计安全系数要求的滑面处桩身剪力.通过实例分析表明:桩身剪力随水平和竖向地震影响系数的增大而增大,水平地震影响系数比竖向地震影响系数对桩身剪力影响显著,桩身剪力随桩位靠近坡顶呈非线性减小趋势.
Abstract
Aiming at the problem of seismic stability analysis of slopes reinforced by stabilizing piles,based on pseudo-static analysis and the theory of limit equilibrium,the extended Spencer method for seismic stability analysis of slopes reinforced by stabilizing piles is proposed.Based on this method,the curve of pile shear force and slope safety factor is received,and the shear force of the pile satisfying the specific design safety factor can be determined.The example analysis shows that the pile shear force increases with the horizontal and vertical seismic influence coefficients,and the pile shear force is more sensitive to the horizontal seismic influence coefficient than the vertical one.The shear force of the pile satisfying the specific design safety factor decreases nonlinearly with the pile position approaching the slope top.
关键词
抗滑桩/桩身剪力/拟静力分析/Spencer法/桩位Key words
stabilizing pile/pile shear force/pseudo-static analysis/Spencer method/pile position引用本文复制引用
基金项目
中国铁建股份有限公司科研计划项目(2023-B15)
中铁第五勘察设计院集团有限公司科技项目科研计划课题(T5Y2022-C04)
出版年
2024
国家科技期刊平台
NSTL
万方数据