Cross-tunnel Fixed Position Hoist Type
The bridge erector is a kind of special crane. It can make 3 dimensional movements: up & down, left to right, back and forth, and it can also make free movement on the bridge pier. The machine can pass the tunnel without being disassembled and it can be assembled 6 meters in the front/ at the back of the tunnel. During the installation, the overall structure and flexible front outriggers, and the rigid rear outriggers support the main beam with 2 supporting points, which forms the simple-supported structure, featuring explicit and stable stress; hoisting at fixed location makes safe and reliable operation and higher efficiency.
The girder launcher, auxiliary crown blocks and outriggers work together to make the girder launcher pass the hole and make the hole passing of the bridge erector in simple-supported condition, thus it has good longitudinal stability and high safety.
The two crown blocks work together to move the girder, featuring synchronized hoist and conveying, and horizontal fine movement. The hoist of the girder adopts 4 points hoist and 3 points balance, featuring good stress condition and hoisting stability.
The span change of bridge erector can be conveniently adjusted, and the girder erection and transport operation is separated, which has high efficiency; Two sets of operation devices are available i.e. special cab and wireless remote control, which achieves simple operation, high safety and reliability; the girder horizontal fine adjustment function makes convenient centering and accurate lowering.