公路工程2024,Vol.49Issue(5) :101-105.DOI:10.19782/j.cnki.1674-0610.2024.05.014

基于未知荷载法的多锚抗滑桩预拉锚索力设计

Optimization of Pre-tensioned Anchor Cable Force for Multi-anchor Anti-sliding Piles Based on Unknown Load Method

沈振 张小兵 方建生
公路工程2024,Vol.49Issue(5) :101-105.DOI:10.19782/j.cnki.1674-0610.2024.05.014

基于未知荷载法的多锚抗滑桩预拉锚索力设计

Optimization of Pre-tensioned Anchor Cable Force for Multi-anchor Anti-sliding Piles Based on Unknown Load Method

沈振 1张小兵 2方建生
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作者信息

  • 1. 中国铁道科学研究院,甘肃兰州 730099
  • 2. 中铁西北科学研究院有限公司,甘肃兰州 730099
  • 折叠

摘要

介绍了索力确定的影响矩阵法,基于该理论建立锚索-抗滑桩锚固Midas模型并通过未知荷载法得到满足位移约束条件的目标索力,最后将设计拉索力和滑坡推力共同作用在桩身上得出相应内力位移.结果表明,在数值设计索力的张拉和滑坡推力加载下,相对于悬臂桩,多锚抗滑桩桩身最大弯矩值大幅减小,此外还能有效控制桩顶位移为0,改善整体桩身的位移状况.

Abstract

This paper first introduces the influence matrix method determined by the cable force,based on the theory,the anchor cable-anti-slip pile anchor Midas model is established and the target cable force that satisfies the displacement constraint conditions is obtained by the unknown load method,and finally the design cable force and the landslide thrust are combined on the pile to obtain the corresponding internal force displacement.The results show that under the tensile and landslide thrust loading of the numerical design cable force,the maximum bending moment value of the multi-anchor anti-slip pile pile body is greatly reduced compared with the cantilever pile,and the displacement of the pile top can be effectively controlled to 0,and the displacement of the overall pile body can be improved.

关键词

滑坡治理/索力设计/数值计算/多锚抗滑桩/未知荷载法

Key words

landslide control/cable force design/numerical calculation/multi-anchor anti-slide pile/unknown load method

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基金项目

甘肃省科技计划项目(21JR7RA738)

出版年

2024
公路工程
湖南省交通科学研究院

公路工程

CSTPCD
影响因子:0.942
ISSN:1674-0610
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