对拉预应力钢束法在挡墙倾斜加固中的应用  

Application of Anti-Tensile Prestressed Steel Beam Method in Inclined Reinforcement of Retaining Wall

作　　者：李雪峰 邓玮琳 祝金伟 LI Xue-feng;DENG Wei-lin;ZHU Jin-wei(Shanghai Urban Construction Design&Research InstituteCo.,Ltd.,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《中国市政工程》2022年第2期21-24,104,105,共6页China Municipal Engineering

摘　　要：软土地基中的悬臂式挡墙经常会发生不均匀沉降和外倾,迫切需对其进行加固。以挡墙不均匀沉降和外倾为背景,首先分析软土地基中挡墙结构发生倾斜病害的原因;并以工程结构形式为例,验算挡墙的抗倾覆安全状态和抗侧滑安全状态,指出在重载交通作用下,挡墙发生倾斜和侧滑的风险。在分析挡墙倾斜病害发生机理的基础上,提出对拉预应力钢束法,用于倾斜挡墙的加固;最后,以上海市实际工程为例,介绍拉预应力钢束法的设计和施工,为后续挡墙倾斜加固提供参考。The cantilever retaining wall in soft soil foundation often has uneven settlement and camber,so it is urgent to strengthen it.Taking the uneven settlement and outward inclination of retaining wall as the background,firstly,the causes of inclination diseases of retaining wall structure in soft soil foundation are analyzed;taking the engineering structure form as an example,the antioverturning safety state and anti-sideslip safety state of the retaining wall are checked,and it is pointed out that the retaining wall has the risk of inclination and sideslip under the action of heavy traffic.Based on the analysis of the occurrence mechanism of the inclined retaining wall,the split prestressed steel tendon method is proposed for the reinforcement of the inclined retaining wall.Finally,taking the actual project in Shanghai as an example,it introduces the design and construction of the prestressed steel tendon method,which provides a reference for the subsequent inclined reinforcement of the retaining wall.

关 键 词：对拉预应力钢束法 悬臂式挡墙倾斜 软土地基 病害机理 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]