摘要
高山峡谷区地形陡峻、地质灾害频发,常规路基拓宽面临施工难、造价高、生态破坏严重等问题。依托四川某“四改三”道路工程,提出一种锚拉式悬挑路基结构,构建“悬挑梁-护肩墙-预应力锚索”协同受力体系。施工过程中引入无人机辅助定位与采用分级张拉工艺,显著提升安装精度与施工效率。工程实践表明:结构在极端荷载工况下抗倾覆稳定系数达3.17,远高于规范要求;较传统抗滑桩方案,单位造价降低、土方开挖量减少、施工周期缩短。结果验证了该结构在复杂地形下的安全性与经济适用性,具有良好的工程推广价值。
In alpine canyon area with steep terrain and frequent geological hazards,conventional road widening schemes often encounter challenges such as difficult construction,high costs,and significant ecological disruption.This study proposes an anchored cantilever subgrade structure for a"four-to-three"highway upgrade project in Sichuan Province.A synergistic load-bearing system composed of cantilever beams,shoulder walls,and prestressed anchor cables was developed.Drone-assisted positioning and staged tensioning techniques are introduced to improve installation precision and construction efficiency.Field results indicate that under extreme loading conditions,the anti-overturning stability factor reaches 3.17,significantly exceeding code requirements.Compared with traditional anti-slide pile solutions,the proposed scheme reduces unit cost,earthwork excavation,and construction duration.These findings demonstrate the structural safety and economic feasibility of the scheme in complex terrain,supporting its broad engineering application potential.
作者
郑金强
ZHENG Jinqiang(Mianyang Chuanjiao Highway Planning Survey and Design Co.,Ltd.,Mianyang 621000,China)
出处
《国防交通工程与技术》
2025年第5期80-83,88,共5页
Traffic Engineering and Technology for National Defence
关键词
公路拓宽
高山峡谷区
路基结构
悬挑梁
方案设计
highway widening
alpine canyon region
cantilever subgrade structure
cantilever beam
scheme design
作者简介
郑金强(1990-),男,工程师,主要从事道路勘察设计工作。
