Device and method for river-crossing sand-mining construction

The invention provides a device and method for river-crossing sand-mining construction. According to the method disclosed by the invention, a river-crossing bateau bridge consisting of a plurality ofbateau bridge bodies is arranged on a watercourse; a sand transporting pipe is fixedly arranged on the bateau bridge; one end of the sand transporting pipe is connected with a sand sucking vessel, andthe other end of the sand transporting pipe is connected to the opposite bank; in each bateau bridge body, two bateau bridge box bodies are fixedly connected through a plurality of connecting beams;and an anchor tying plate for connecting an anchor chain is arranged on each bateau bridge box body. During construction, the bateau bridge box bodies are manufactured in a plant; every two bateau bridge box bodies are combined to form one bateau bridge body with corresponding connecting beams on site; a stone anchor is poured into a river for fixing the bateau bridge bodies; joining beams are fixedly connected with the bat