长阳清江大桥变形监测与变形分析

Deformation monitoring and analysis for Changyang Bridge on Qingjiang River

湖北长阳清江大桥系清江隔河岩水利枢纽施工和运行期间对外交通的重要组成部分。由于右岸桥台基础与其它桥墩、桥台之间产生不均匀沉陷，使右岩桥台支座限位板破坏，后按设计要求进行了调整处理。考虑到隔河岩工程的大型设备运输须经过该桥，故对该桥进行了变形监测工作。监测期间，隔河岩工程第１、２批国外进口的重大件，用平板车分别通过大桥运抵工地。监测系统较好地反映了大桥的变形状态，并及时提出了可靠的变形监测数据，满足了主管单位的要求。此外，通过对监测序列的组合模型分析，初步认为：大桥右岸桥台在没有新的、强大的外部荷载干挠下，将逐步趋于稳定。

The Changyang Bridge on the Qingjiang River is an important component of the access for the Geheyan Project during the periods of construction and operation. The non-uniform settlement between the abutment and the pier on right bank resulted in the damage to the location -limited plate on right bank abutment, which has been treated in accordance with designer's requirements. The deformation monitoring was carried out on this bridge because it is the only passage for transportation of heavy equipments of Geheyan Project to its site. The monitoring system watched over the bridge when elements of heavy equipments from abroad twice passing through the bridge, and has reliably obtained its deformation data, which have met the requirements of responsible department. In addition, the datum series has been analysed by means of combination model. From the result, it may be considered that the deformation of right bank abutment of the bridge would trend gradually to stability under no another large external loads conditions.