岩质边坡桩-锚复合支护结构抗滑作用机理研究  

Study on the Anti-slip Mechanism of Pile-anchor Composite Support Structure for Rock Slopes

作　　者：汪红武 李文菊 饶颖曜 梁栋才 毕钛俊 Wang Hongwu;Li Wenju;Rao Yingyao;Liang Dongcai;Bi Taijun(Yunnan DaBao Expressway Investment Development Co.,Ltd.;Yunnan Communications Investment Group Investment Co.,Ltd.;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences)

机构地区：[1]云南大保高速公路有限公司,云南大理672600 [2]云南交投集团投资有限公司,昆明市650000 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉市430071

出　　处：《勘察科学技术》2024年第4期16-19,共4页Site Investigation Science and Technology

基　　金：云南省交通厅科技创新项目([2024]116号);国家自然科学基金(51779250)。

摘　　要：抗滑桩-坡面预应力锚索组合支护结构以其良好的加固效果,可有效提高路堑边坡的稳定性。该文基于某高速公路边坡工程,建立了桩-锚组合支护结构的受力监测系统,分析了抗滑桩和预应力锚索的受力发展过程,总结了桩-锚组合支护结构的抗滑作用机理。结果表明:(1)抗滑桩-预应力锚索组合支护结构有明显的时间效应,支护结构内部受力条件随时间的增长逐渐趋于稳定;(2)预应力锚索先于抗滑桩发挥作用,开挖后及时支护极为重要;(3)支护结构稳定期约6个月,在边坡加固完成后,应加强动态持续监测工作。The combination support structure of anti-slip piles and prestressed anchor cables on the slope can effectively improve the stability of cutting slopes due to its good reinforcement effect.Based on a certain highway slope project,a pile-anchor composite support structure is designed,and a stress monitoring system for the support structure is established in this paper.The stress development process of anti-slip piles and prestressed anchor cables are examined,and then the anti-slip mechanism of the pile-anchor composite support structure is summarized.The results show that:①There is a significant time effect in the composite support structure of anti-slip piles and prestressed anchor cables,with internal stress conditions gradually stabilizing over time.②Pre-stressed anchor cables play a role before anti-slide piles,making timely support after excavation crucial.③The stability period of the support structure is about 6 months.After the slope reinforcement is completed,dynamic and continuous monitoring work should be strengthened.

关 键 词：抗滑桩 预应力锚索 组合 抗滑机理 

分 类 号：U416.14[交通运输工程—道路与铁道工程]