Abstract：Research purposes: Based on the theory calculation and the analysis of bridge, the paper studied the control system of continuous rigid frame bridge. The factors that affect the alignment of cantilever construction are analyzed. It adopts survey datum to modify model parameters to control the alignment of deck well.
Research methods: Based on the theory of construction control, with reference to the characteristic of the 3rd bridge over Fujiang River, construction control model is established by the software of finite element analyses. The construction quality is ensured by the survey datum and the results of theory calculation.
Research results: The closures of bridge are all finished naturally, and the closure errors are in the criterion value 2cm. The deck alignment of completed stage is so smooth that it matches with the design alignment well.
Research conclusions: Many influences factors are to be considered in construction stages, and using the survey datum to modify model parameters, as a result, it can achieve a good alignment to match the design alignment.
2006, Vol. 23 
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