Abstract：Research purposes: The double -lane highway bridge in Tianjin Nanjiang Haven is an important traffic passageway for large -sized vehicles going to and coming from Tianjin Nanjiang Haven. One lane is designed for the vehicle with three axis, vehicle weightof 750 kN and vehicle distance of10 m. The design load of the bridge is great than ?grade highway. So it is necessary to control distortion and stress in cantilever castfor the purpose sofensuring the bridge closure and construction safety, and obtaining a perfect bridge type of line.
Research conclusions:Only distortion and stressofbridge is controlled in construction and themoulding board elevation is ensured, the bridge type of line and stressdistribution can satisfy the design requirement. The distortion measurement should be conducted before sunrise to eliminate effect of temperature difference. The real field measured values of the concrete elasticmodulusmustbe adopted in computation. In construction control of this bridge, the errors happened in construction is modified by adopting parameter identification method, obtaining a good resul.t As the effect sofshrinkage and creepage are evident in stress testing, the effect should be calculated to each construction phase for the clear and easy usage.
郑永红. 天津南疆港预应力连续梁桥悬臂施工监控[J]. 铁道工程学报, 2009, 26(10): 47-50.
ZHENG Yong-hong. Research on the Construction Control of Cantilever of Prestressed Continuous Bridge in Tianjin Nanjiang Haven. 铁道工程学报, 2009, 26(10): 47-50.
2009, Vol. 26 
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