明挖施工影响公路高架桥变形预测及分析  

Deformation Prediction and Analysis of Highway Viaduct Affected by Open-Cut Construction

作　　者：聂永 肖英楠 张晓亮 NIE Yong;XIAO Ying-nan;ZHANG Xiao-liang(Beijing Capital Highway Development Group Expressway Construction ManagementCo.Ltd.,Beijing 100068,China;Beijing Texida Transportation Facilities Counsultants Co.Ltd.,Beijing 100068,China)

机构地区：[1]北京市首发高速公路建设管理有限责任公司,北京100068 [2]北京特希达交通勘察设计院有限公司,北京100068

出　　处：《工程建设与设计》2025年第4期79-81,共3页Construction & Design for Engineering

摘　　要：通过梳理文献,阐述了明挖施工对桥梁结构变形的影响的研究成果,以北京市某新建再生水、给水、热力、通信管道明挖施工下穿城市立交桥为研究对象,采用FLAC 3D数值模拟软件计算分析不同施工步序的市政管线明挖施工对既有立交桥的变形特征。计算结果表明,在桥下土体多次开挖与回填的施工作业条件下,既有立交桥梁变形较小,能够满足既有立交桥变形控制要求及交通运营要求。By reviewing the literature,the research results of the influence of open cut construction on the deformation of bridge structure are expounded.In this paper,FLAC 3D numerical simulation software was used to analyze the deformation characteristics of existing overpasses caused by open-cut construction of municipal pipelines with different construction steps.The calculation results show that under the construction conditions of multiple excavation and backfilling of the soil under the bridge,the new deformation of the existing overpass is small,which can meet the deformation control requirements and traffic operation requirements of the existing overpass.

关 键 词：明挖施工 市政管线 数值模拟 桥梁变形 

分 类 号：U455[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]