Segmental assembled bridge girder erection machine for construction of small curved bridge

A segmental assembled bridge girder erection machine for the construction of a small curved bridge at least comprises girders which can be automatically bent, a rear support leg, a front support leg, at least one middle support leg, a hoisting crown block which can move along a broken line, and a plurality of hoists, wherein the girders which can be automatically bent comprise two parallel steel girders, and transverse bracings are not arranged between the two steel girders; each steel girder comprises a middle steel box girder, and a front guide girder and a rear guide girder which are located on the two sides of the middle box girder; the girders which can be automatically bent are supported through the rear support leg and the front support leg which are arranged below the girders, as well as the middle support leg located between the front support leg and the rear support leg; the hoisting crown block which can move along the broken line is arranged at the upper parts of the girders which can be automatically bent, and can move back and forth; the hoists are further arranged on the girders which can be automatically bent. Therefore, the mini-sized curved bridge with a radius of at least 60 m can be passed and erected through the segmental assembled bridge girder erection machine; the segmental assembled bridge girder erection machine satisfies various performance requirements, achieves remarkable economic and social benefits, and fills the gaps of small-curvature girder erection and cross bridge girder erection machines at home and abroad.