Project

Production site for the superstructure

The onshore production sequence of bridge girders will consist of production of the girder elements at a steel factory that can be located anywhere in the world.

Production will comprise cutting, welding and assembly of the steel part of the girders. Casting of the road slab may also be carried out at the factory site. After casting the road slab, the girder elements will be transported to the onshore construction site for the final installation of smaller elements, such as railway equipment. Long bridge girders can be sub-divided into smaller sections and brought to the construction site for final assembly.

The steel superstructure is labour-intensive and will require a large number of skilled welders and highly specialised facilities such as computerised cutting and welding equipment, heating of steel structures, indoor painting facilities, steel-handling facilities etc. These facilities are costly and highly specialised and are available at several locations across the world. Transportation over long distances is a less important cost factor.

A heavy lifting vessel will be used to transport structures from the construction site to the permanent location.  

Figures on the High Bridge (estimates)

Length 3,300 m  
     
Pylon caissons    
No. of pylon caissons 4  
Concrete 115,000 m3  
Reinforcement 27,500 ton  
Construction time 12 months  
Dry dock for pylon caisson    
prefabrication 150,000 m2 Max. distance from bridge alignment 120 km
Area of pylon caissons 70 x 120 m  
Pylon shafts    
No. of pylon shafts 4  
Concrete 160,000 m3  
Reinforcement 35,500 ton  
Construction time 41 months  
Side span piers 1)    
No. of piers 4  
No. of caissons 4  
Concrete 60,000 m3  
Reinforcement 15,000 ton  
Superstructure 2)    
Total length of girders  3,300 m  

The girders for the superstructure will probably be installed in 20-48 m long sections. Construction time follows that of the pylons, e.g. 41 months.

1) Piers and caissons for the High Bridge can be constructed at one of the Approach Bridges’ construction sites.

2) It is assumed that the High Bridge girders will be fabricated at a steel construction yard outside the bridge site area, probably including the concrete road deck, and then transported to the bridge site in small sections for erection directly.

 

Theoretical illustration of a casting site for caissons for the pylons  

Timeline

Alternative content

Get Adobe Flash player