宁安铁路安庆长江大桥长期监测方案设计研究

Monitoring Program Design of Anqing Yangtze River Bridge on Nanjing-Anqing Railway

宁安铁路安庆长江大桥主桥为双塔三索面钢桁梁斜拉桥,属于高次超静定结构,具有很强的非线性,受力情况复杂。为了及时反馈桥梁服役情况,确保线路安全运营,亟需建立一套长期监测系统。根据安庆长江大桥的主要技术特点,确定大桥的监测内容、监测方法、测点布置位置、数据采集与传输方法和预警与评估方法,形成一套针对安庆长江大桥的长期监测方案。研究成果可为我国类似大跨度桥梁长期监测方案的制定提供参考。

The main bridge of Anqing Yangtze River Bridge is a steel truss girder cable stayed bridge with double-pylon and triple-cable plane and it is a high-statically indeterminate structure with strong nonlinearity and complex stress. In order to timely feedback the service conditions of the bridge and ensure safe operation of line,it is required urgently to build a long-term monitoring system. This paper addresses the main technical characteristics of the bridge and puts forward a set of long-term monitoring programs in perspective of monitoring content, monitoring method, position of measuring points, method of data collection and transmission, early warning and assessment. The research results may provide reference for the long-term monitoring program design of similar large span bridges.