This invention relates to the field of
bridge engineering technology, specifically to a wind-resistant device and construction method for the main girder of a cable-stayed-suspension bridge during construction. It includes: a first connecting part, a second connecting part, a crossbeam, and anchor cables. The first connecting part is fixedly connected to the main girder in the suspension zone, with at least two sets of the first connecting parts connected to both ends of the main girder in the suspension zone, distributed on both sides of the main girder in the suspension zone. The second connecting part is fixedly connected to the main girder in the cable-stayed zone, with at least two sets of the second connecting parts connected to one end of the main girder in the cable-stayed zone near the main girder in the suspension zone, distributed on both sides of the main girder in the cable-stayed zone. The crossbeam is connected to two main cables in the overlapping zone. One end of the anchor cable is connected to the first connecting part, passes through the crossbeam in the middle, and the other end is connected to the second connecting part. This invention can improve the wind resistance performance of the main girder in the suspension zone, and is highly targeted, has good wind
control effect, and is convenient to install and apply.