Singapore Punggol Bridge Project

What Do You Know about HZQ59/80 Segmental Assembly Bridge Girder Launcher?

FAQ Jul 09, 2012 No Comments

(1) Overview

According to field working condition in Singapore, combined with ZZHZ successful design experience of bridge girder launcher, HZQ59/80 segmental assembly bridge girder launcher is designed as honeycomb type double girder machine, which features as below:

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1. Unique honeycomb girder, features light self-weight, large load, strong wind resistance ability and others

2. new form and reasonable structure, the bridge girder launcher takes modern bridge construction features and similar bridge working condition demands into consideration, so it has wider adaptability.

3. use ANSYS finite element software to analyze and calculate the machine, optimize the structure of the complete machine to control weight, stiffness and safety stability;

4. With roller system at top of the middle support leg, crossing piers step by step, thus reduce the pressure of the bridge deck and save construction cost, and has a better adaptability to the box girder

5. support leg moves forward automatically, so the bridge girder launcher can better adapt to longitudinal slope and cross slope in the actual working condition, at the same time the bridge deck bears more reasonable and safer force.

6. the front, middle and rear support leg can be adjusted at random and is equipped with angle-adjustable core plate to better adapt to construct curved bridge and skewed bridge

7. lifting trolley sling moves transversely which has rotation, longitudinal, lateral angle adjustment functions and can accurately put the girder in place, safe, reliable, simple and fast

8. main girder and connection parts use mature pin connection, firm and reliable, meet the technical demand of assembly, disassembly and convenient transition construction.


(2) Technical specification and design standards

1 《road bridge reinforced concrete and prestressed concrete structure design codes》 TB1002.3

2 《crane design codes》                    GB3811

3 《crane test standards and procedures》         GB5905

4 《hoisting machinery safety codes》            GB6067

5《steel structure design codes》                 GBJ50017

6 《special equipment safety technical specification》TSG Q7002、Q0002

7 《general assembly technology requirements》       JB/ZQ400.9

8《general technology requirements on weld assembly》JB/ZQ400.3

9 《fasteners mechanical properties》                 GB3098

10《basic standard for low-voltage apparatus》              GB1497

11《hydraulic system general technical specification》 GB/T3766



(3) Main technical parameters

Model                      HZQ59/80

Span (m)                     59

Rated lifting capacity (t)          80

Applicable gradient (%)         longitudinal gradient ≤±2%

Transverse gradient ≤±2%

Launcher longitudinal moving speed (m/min)               4.6

Launcher transverse moving speed (m/min)                 3

Trolley longitudinal moving speed (m/min)             4.6

Trolley transverse moving speed (m/min)               1

Lifting speed (m/min)                               0.8

Assembly mode:                                 segmental assembly

Centre distance between main girders(m)                 6.5

Allowable wind force in working condition (grade)             ≤6

Limit wind force as crossing piers (grade)     ≤4

Total power (kw)                              about 100KW

Total weight (t)                              about 290t

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