Earthwork transfer bridge for large foundation pit

The earthwork transfer bridge for the large foundation pit comprises symmetrically-arranged bridge bodies, each bridge body comprises symmetrically-arranged lower beam frames, a plurality of triangular steel frames are installed above the lower beam frames, an upper beam frame is fixedly connected to the tops of the triangular steel frames, the lower beam frames of the two bridge bodies are connected through a connecting mechanism, and a lifting bucket is arranged between the two bridge bodies. The two sides of the lifting bucket are connected with the lifting mechanism through steel ropes, the lifting mechanism is fixedly installed at the end, close to the connecting mechanism, of the upper beam frame, the stand columns are symmetrically and fixedly installed between the lower beam frame and the upper beam frame and fixedly installed at the ends, close to the connecting mechanism, of the lower beam frame and the upper beam frame, and the material guiding mechanism is fixedly installed between the stand colum