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The construction technology of concrete filled steel tube arch bridge with large span is complex and difficult, and the construction period is long, so it is necessary to research on the whole process of the bridge construction. The FEM is used to study the states of displacement and stress of a concrete filled steel tube arch bridge with a 100 meters span through the whole construction process. The calculation results provide a theoretical basis for the construction monitoring to revise the necessary adjustments of the design and construction through the actual construction process. The vertical displacement, horizontal displacement and stress of the control section of the arch ribs are calculated by the FEM and monitored during the construction process. The accuracy and validity of the model are verified by comparing the theoretical values of these parameters with the measured values. The results show that the error between the FEM model and the measurement value is small. The theoretical simulation of FEM can provided reference to the observation and control of construction monitoring.

Construction Monitoring of Concrete Filled Steel Tube Arch Bridge with Large Span