English：

In the construction process of concrete filled steel tube arch bridge, the core concrete pouringof arch rib is the key construction technology, and different concrete construction sequences affect thestructural stress and overall stability of the arch bridge. Taking the dumbbell⁃shaped cross⁃sectionconcrete filled steel tube arch bridge as an example, firstly, all possible concrete construction sequencesare listed by exhaustive method, and then the stress and deformation of arch ribs under differentconstruction sequences are analyzed to obtain the optimal construction scheme. The research results showthat with the progress of concrete pouring, the stress of steel tube increases gradually. After theconstruction is completed, the deflection range of different sections of the arch rib is small and basicallynegligible. The optimal concrete pouring sequence is downstream lower chord tube, upstream lower chordtube, upstream upper chord tube, downstream upper chord tube, batten plate and transverse brace.