大跨径钢桁梁拱桥变形监测方案设计与精度分析

摘要

During the bridge operational period,because of the external and inner factors,the safety,applicability and durability of bridge structure will be destroyed.In order to ensure the safe operation of bridges,it is necessary to take health monitoring and safety assessment.Combined with engineering practices,datum network building,layout principle of deformation points,and data monitoring of long-span bridges are described in detail in this paper.Furthermore,the accuracy analysis of displacement and settlement observation is discussed.This paper provides reference function for the health monitoring and operation management of the bridges with the same type.%桥梁在运营过程中由于受到外部因素破坏及内部性能退化等影响,桥梁的安全性、适用性和耐久性都会降低,为了保证桥梁的安全运营,必须对其进行健康监测及安全评估。本文结合工程实例详细介绍了大跨径桥梁变形监测的基准网建立、变形点布设原则和数据监测,并对位移和沉降观测进行精度分析等,为同类型桥梁健康安全监测和运营管理起参考借鉴作用。