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中山港大桥主桥是80m和100m的T形刚构接挂梁的形式,该桥运营多年,T构出现明显下挠、开裂现象,2010年对该桥进行加固维修,其中主桥T构采用了张拉体外索的加固方式。该文以主桥中1个100mT构(41#墩T构)为背景,对施工张拉体外索的全过程进行详尽的监控,包括应力监测、挠度监测及索力监测,指导施工实践,确保设计在施工中得以准确实现。
The main bridge of Zhongshan Port Bridge is in the form of a T-shaped rigid connecting beam with a length of 80m and 100m. This bridge has been operating for many years. The T-structure has obviously under-scratched and cracked. In 2010, the bridge was reinforced and repaired. Tension extra-cable reinforcement method. Based on a 100mT structure (41 # pier T structure) in the main bridge, this paper detailedly monitors the whole process of construction of extracavitary cords, including stress monitoring, deflection monitoring and cable force monitoring, guiding construction practice and ensuring Design in the construction can be accurately achieved.