锚拉刚性桩锚索预应力取值试算法
Trial Calculation Method for Pre-stress Value of Anchor Cable in Rigid Anchor Pile
龚道平 1王泗 1方强 1李慧丽 1胡新红1
作者信息
- 1. 湖南省交通规划勘察设计院有限公司,长沙 410200
- 折叠
摘要
在预应力锚索抗滑桩的设计计算中,锚索初始预应力的取值对抗滑桩的内力调整、桩顶位移控制及长期工作状态下锚索拉力大小均存在较大影响.本文在总结已有的锚索预应力计算方法的基础上,结合锚索-抗滑桩的变形协调原理,提出了试算法的基本思路.利用Matlab平台编制计算软件,求解变形协调方程,得到与不同初始预应力对应的锚索拉力,再根据锚索拉力增量变化曲线、抗滑桩弯矩变化曲线、桩顶位移控制等条件综合确定锚索初始预应力值,其值约为抗滑桩滑坡推力的11%.
Abstract
In the design and calculation of pre-stressed anchor anti-sliding piles,the initial pre-stress value of the anchor cable has a significant impact on the internal force adjustment of the anti-sliding pile,the control of pile top displacement,and the magnitude of the anchor cable tension under long-term working conditions.Therefore,based on the summary of existing methods for calculating the pre-stress of anchor cables,this article would propose the basic idea of the trial calculation method by combining the deformation coordination principle of anchor cables and anti-sliding piles.Using Matlab platform to develop calculation software,solve the deformation coordination equation,and obtain the anchor tension corresponding to different initial pre-stress.Based on the incremental change curve of anchor cable tension,the bending moment change curve of anti-sliding pile,and the control of pile top displacement,the initial pre-stress value of the anchor cable could be determined comprehensively,which was about 11%of the landslide thrust of the anti-sliding pile.
关键词
锚索桩/锚索初始预应力/试算法/锚索拉力/变形协调/滑坡推力Key words
anchor pile/initial pre-stress of anchor cable/trial calculation method/anchor cable tension/deformation coordination/landslide thrust引用本文复制引用
出版年
2024
NETL
NSTL
万方数据