HZQ Launching Gantry Integrating Carrying and Erecting Functions

Launching Gantry

ZZHZ is a professional manufacturer of hoisting machinery, the main products include all kinds of launching gantry, gantry crane which are widely used in the highway construction projects. The honeycomb girder launching gantry made by our company is welded by the honeycomb steel plate and triangular web plate. The overall shape is triangle. Compared with the box girder, it owns the characteristics of lower gravity center, light weight, safe and good wind-resistance. Compared with the truss girder, it owns wide welding contact surface and the suffered force is even. When the truss girder suffers the force, the load-bearing points are the channel steel welding points and easy to mechanical deformation. Therefore, the honeycomb girder owns the characteristics of light deflection and high rigid intensity. The connection method between the two girders is the pin-connecting. While assembling the machine, just entering the six steel pins is enough. In this way the assembly period is short. Usually it only takes a week to install the whole set of launching gantry.

This type of launching gantry made by ZZHZ has equipped with a set of center support leg and ingot beam. The machine is assembled on the road base previously and moves forward to accomplish the task through the piers. After the machine has reached the position, fix the front part as the support and dismantle the pin connection to make the rear part of machine traveling to the concrete girder yard to lift the beam. When these girders are transported to the proper position, fix them with the rail plates and bolts. The trolleys on the front part of the machine lift the concrete girder and move to the piers, place them between the two piers after finding the proper position. For the construction of the edge girder, firstly place the girder in the center position. Then move transversely the girder with the special rack and trolleys to the edge position and accomplish the erection. Because of the different project conditions, we adopt different construction methods according to the exact condition.
The other method is that assemble the machine and erect the girder on the piers directly. Assemble the rear part of machine and install the transverse rail on the ground, then hoist this part to the piers with the truck crane to erect the girder through the lateral movement. Then place the sleepers below the machine as the support device and make the rear part of the machine moving backward 8m. After assembling the front part of the machine and bridge girder erection in the same way, connect the both parts and travel longitudinal to launch and erect the following girders. If it needs to erect in the opposite direction, just replace the position of front and rear support legs to meet the demands.
With the characteristics of multi-function, high efficiency and low

cost, the launching gantry integrating carrying and erecting made by ZZHZ has made a significant contribution to the national highway project construction.