In the first half of 1998 Shell Exploration Philippines (SPEX) put out to tender the design, construction and installation of a wet storage CGS (Concrete Gravity Substructure) for the Malampaya gas field
In the first half of 1998 Shell Exploration Philippines (SPEX) put out to tender the design, construction and installation of a wet storage CGS (Concrete Gravity Substructure) for the Malampaya gas field. The structure had a dry displacement of 75,000 tons and consisted of 25,000 cubic meters of concrete, 7,000 tons of reinforcement, 600 tons of pre-stressing and 1,500 tons of mechanical outfitting, including secondary steelwork.
The location for the construction of the CGS was on a greenfield site at Green Beach, Subic Bay in the Philippines. By mid-March 1999 the construction of the dry dock was well advanced when the Client requested a change from wet storage to dry storage.
The change from wet to dry storage entailed a significant increase in the design and subsequent structure, all to be completed with no change to the original programme. The already constructed dry dock had to be deepened and widened. In addition there was a considerable increase in the quantity of work. The formwork increased by 18%, the volume of concrete increased by 35%, and the amount of reinforcement increased by 72%. The flow-on effects required more infrastructure than had previously been planned and constructed.
Precisely three months ahead of schedule, on a clear and calm dawn on 1 June 2000, four ocean going tugs slowly manoeuvred the massive 95,000 ton Malampaya Concrete Gravity Substructure into position off the coast of Palawan, Philippines.
| Project |
: |
Malampaya Off Shore Concrete Gravity Structure Platform
|
| Location |
: |
Green Beach, Subic Bay (Filippine)
|
| Type |
: |
Platform in prestressed concrete for dry storage for the Malampaya gas field |
| Main client |
: |
SHELL PHILIPPINES |
| Contractor |
: |
MALAMPAYA CGS ALLIANCE - JOHN HOLLAND PTY LTD (Australia) - ARUP ENERGY (U.K.) - VAN OORD ACZ (Olanda) |
| Designer |
: |
ARUP ENERGY (UK)
|
| Period |
: |
7/1999 – 4/2000
|