The "Steel Giant" of Bridge Construction - Double-Girder Portal Lifting Machine
At the bridge construction site, the double-girder gantry crane resembles a majestic "steel giant," majestically lifting the "framework" of the bridge project.
Technical Parameters:
| Lifting Capacity | 100t～500t (customizable, mainstream specifications include 160t, 200t, 320t, 450t, etc., suitable for precast beams of different tonnages) |
| Span | 20m～50m (flexibly designed according to beam yard layout and transverse dimensions of precast beams) |
| Lifting Height | 10m to 30m (to meet the space requirements for multi-layer stacking of beams and lifting to the bridge erection machine/transport vehicle) |
| Work Duty | A6～A8 (adapting to the construction intensity of “frequent heavy load” in bridge projects) |
| Power Supply | cable drum or busbar, voltage 380V (three-phase five-wire system) |
The gleaming red steel structure creates a striking visual impact, and the twin main beams, with their vast spans, stand like sturdy arms, firmly anchored on the tracks. Even with precast box girders weighing hundreds of tons, it precisely "lifts" the massive beams, keeping them stable and rock-steady in mid-air. The exceptional stability afforded by the double-girder structure allows it to effortlessly lift, transfer, and align large-span, heavy-tonnage bridge components.
An intelligent control system adds wisdom to its "hardcore" capabilities: From the control cabin, operators use precise instruments and joysticks to control the crane with millimeter-level precision, ensuring a perfect fit between precast beams and piers and bearings. Whether it's a cluster of high-speed railway bridges on plains or a super-large cross-valley bridge in mountainous areas, it can adapt to complex working conditions, efficiently completing beam-lifting tasks and significantly shortening bridge construction cycles. With every smooth lifting and every precise lowering of the beam, the double-girder gantry crane is accelerating the vision of "turning natural barriers into thoroughfares", witnessing the "Chinese speed" of China's bridge engineering and demonstrating its hard-core strength in the infrastructure field.