Harbour Area Treatment Scheme - PTW Drop Shafts & Scum Chambers

Project data

Location: Hong Kong Island, Hong Kong

Shaft Sites

1. Aberdeen PTW Dropshaft & Scum Chamber
    
2. Wah Fu PTW Dropshaft & Scum Chamber
    
3. Cyberport PTW Dropshaft & Scum Chamber
    
4. Sandy Bay PTW Dropshaft & Scum Chamber

Overall Depth:

1. Aberdeen: 9.20m
2. Wah Fu: 22.50m
3. Cyberport: 17.80m
4. Sandy Bay: 18.80m
   
   Construction period: July - October 2014

• Concrete lining of pre-excavated shafts; 4 No. in total

• Construction of a rectangular Scum Chamber in each shaft

Wah Fu shaft: elliptical; with a finished lining size of 7.000m x 5.000m; other linings: circular with a finished lining size of 8.000m dia.

Requirements

• Fast construction progress, easy system operation
• Minimum crane usage for the system
• Form elements to follow the structure shape (circular, elliptical and rectangular)
• Optimized element sizes, hinges and retraction devices used for stripping, no additional assembly/ modification works necessary during the construction
• Maximum safety for workers
• Central opening in platforms for material and manpower transfer

 

Customer

Leighton - LNS JV