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

作　　者：龚道平 王泗 方强 李慧丽 胡新红 GONG Daoping;WANG Si;FANG Qiang;LI Huili;HU Xinhong(Hunan Provincial Communications Planning,Survey and Design Institude Co.Ltd.,Changsha 410200,China)

机构地区：[1]湖南省交通规划勘察设计院有限公司,长沙410200

出　　处：《铁道建筑》2024年第8期130-135,共6页Railway Engineering

基　　金：湖南省交通运输厅科技计划(202120)。

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%。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 

分 类 号：U213.152[交通运输工程—道路与铁道工程] TU470[建筑科学—结构工程]