运营城际铁路大跨度连续梁竖向挠度监测探讨

Discussion on vertical deflection monitoring of long-span continuous beam of intercity railway

针对城际铁路大跨度连续梁在运营期病害整治过程中原有桥面监测点无法正常观测,以及常规水准测量无法实施的问题,本文提出了一种利用连续梁通风孔布设监测标志,采用高精度智能全站仪三角高程法采集监测数据进行运营城际铁路大跨度连续梁竖向挠度监测的方法。经某城际铁路大跨度连续梁运维加固整治期间竖向挠度监测试验验证,该方法监测点布设简便,监测效率高,能够在不中断列车运营的情况下,准确测量运维整治期间连续梁竖向挠度的变化情况,为连续梁运维加固提供了可靠的监测信息。

In order to solve the problems that the original monitored bridge deck points cannot be observed normally and conventional leveling cannot be implemented during the disease control process of large-span continuous beams in intercity railways operation,this paper proposes a method of using continuous beam ventilation holes to set monitoring signs and high-precision intelligent total station trigonometric elevation method to collect monitoring data for the vertical deflection monitoring of largespan continuous beams in intercity railway bridges.This method is proved by the vertical deflection monitoring test during the operation and reinforcement of a large-span continuous beam in an intercity railway to have such advantages as simple point layout,high operation efficiency,and it can be used to accurately measure the changes in vertical deflection of continuous beams during operation and maintenance without interrupting train running.It provides reliable monitoring information for the operation and reinforcement of continuous beams.