道路提升改造工程中桥梁监测方案探讨

Discussion on bridge monitoring scheme in road upgrading project

在道路改造工程中,既有大桥的承载状态会相应发生变化,新建桥梁受某些偶然荷载的影响结构稳定性也会发生改变,为保证工程施工时的安全,需要对新旧桥梁进行监测。本文结合工程实例,以福州市某道路提升改造工程为依托,对既有桥梁的监测项目、监测频率、监测方法以及新建桥梁的首次测量进行介绍。采用全站仪三维位移监测结合精密水准测量方法,对新旧桥梁的桥墩沉降以及墩顶水平位移进行监测。结果表明,桥墩沉降及墩顶水平位移值始终处在安全范围之内,该方案在保证施工安全以及精度要求的前提下,通过监测项目相结合,可以减少监测点的布设以此降低成本,并且监测数据能够相互校核以此迅速发现误差,希望为类似工程提供参考。

In the road renovation project,the bearing state of the existing bridge will change accordingly,and the structural stability of the new bridge will also change under the influence of certain accidental loads.To ensure the safety of the project construction,new and existing bridge should be monitored.Based on a project example,this paper introduces the monitoring items,monitoring frequency,monitoring methods of the existing bridge and the first measurement of the new bridge,based on a road upgrading and renovation project in Fuzhou City.Using three-dimensional displacement monitoring of the total station combined with the precision level measurement method to monitor the settlement and the horizontal displacement of the pier.The results show that the settlement and the horizontal displacement of the pier are always within the safe range,and the scheme can reduce the layout of monitoring points and reduce costs by combining monitoring items under the premise of ensuring construction safety and accuracy requirements,and the monitoring data can be checked to quickly find errors hoping to provide reference for similar projects.