Launching gantry: 1. Quite reliable to install girders 2. Honeycomb girder 3. High safety 4. Outstanding quality
1. Main technical parameters of bridge girder launcher
item | specification |
Span(m) | 50 |
Rated lifting capacity(t) | 150 |
total weight of launching gantry(t) | About 190 |
Structure | Honeycomb girder |
Out dimension(m) | About 85.7×11×13 |
Minimum curve radius(m) | ≥ 350 |
Maximum allowable gradient(%) | Longitudinal gradient ≤±3% Transverse gradient ≤±4% |
Lifting speed(m/min) | 0.8 |
Launcher longitudinal moving speed(m/min) | 4.0 |
Launcher transverse moving speed(m/min) | 2.87 |
Trolley longitudinal moving speed(m/min) | 4.0 |
Trolley transverse moving speed(m/min) | 1.8 |
Power(kw) | About 100 |
Comprehensive working speed | 2 span in 3 days |
Allowable wind speed in working condition(grade) | ≤6 |
2. assembly order
assembly order: measure and position—lay rail track—install two main girders in a balanced and symmetrical position—assemble front connection frame and rear connection frame—install middle support—install front support, rear bracket and rear support—lift and install trolley—hydraulic and electrical system—plug in
3. Design basis
1) road bridge reinforced concrete and prestressed concrete structure design codes TB1002.3-98
2) crane design standard GB3811-2008
3) crane test standards and procedures GB5905-86
4) hoisting machinery safety codes GB6067-85
5)design code for steel structure GBJ50017-2003
6) general assembly technology requirements JB/ZQ400.9-86
7) general technology requirements on weld assembly JB/ZQ400.3-86
8) fasteners mechanical properties GB3098-82
9)low-voltage apparatus basic standard GB1497-85
10)general technical specification for hydraulic system GB/T3766-2001
HZQ50-150 Highway bridge girder launching gantry
