基于倾角仪测试铁路桥梁静态挠度

Measure static deflections of railway bridge with inclinometer

桥梁挠度测量是桥梁检测的重要组成部分和安全性评价的一项重要指标。随着铁路桥梁设计跨度逐步增大、桥梁主跨下面为江流等因素,传统的静态挠度测试法如水准仪等不再适合测试大跨度桥梁的静态挠度,该文利用QY倾角仪测量了焦柳铁路线上的融水大桥第3跨的静态挠度。测试结果表明:倾角仪测得的静态挠度值与水准仪测得值相差较小,其挠度曲线也相似于有限元分析所得挠度曲线,可适用于大跨度铁路桥梁的静态挠度测试。

The bridge deflection measurement is an important component for the bridge examination and an important target for the security evaluation.As the span of railway bridge designed is longer than before and there are always water under the bridge,the traditional way of static deflection measurement,such as level gauge,can＇t be used to measure the static deflection of large bridge.The static deflections of Rongshui Bridge at Jiaoliu railway are measured with QY inclinometer.The test results indicate that the static deflection measurement results of QY inclinometer is very close to those of the level gauge,and its deflection curve is also similar with that obtained by the finite element analysis.And the result shows the QY inclinometer can satisfy the deflection test requests of large-scale railroad bridges.