POWER
STATION
CIVIL ENGINEERING AND PUBLIC WORKS
Over 500 Piles Support
Third Addition To
North Point Plant
亍
C
General ONSTRUCTION work on the Hong Kong Electric Company's 'C' power station, started in October 1963, is more than 50 per cent. com- plete and by 1966 the station will be ready to add a further 120 MW to the installed capacity of the existing plant.
The company's old 'A' station generated 75 MW, and in 1960 this capacity was trebled with the com- pletion of the 'B' station.
Now another addition is under way, but even so it is forecast that the demand for electricity, created by the continuing expansion of com- merce and industry on Hong Kong island, will again outstrio supply in the future and the HKEC is already investigating its requirements for still further development over the next ten years.
Main contractors for the 'C' station are English Electric Co., Ltd. Archi- tectural treatment, civil design and construction were entrusted to George Wimpey and Co. Ltd., Lon- don, as nominated sub-contractors.
Limited Space
Stations 'A', 'B' and 'C' are all located at North Point, on the north side of the island, alongside the main harbour area overlooking Kowloon. All the surrounding area of land is completely built up and to provide space for the 'C' station part of the old 'A' station had to be demolished. However the new site is still very restricted, giving only about 15 ft.
Far East Architect & Builder April, 1965
view of the site work taken from the harbour
clear all round to adjacent buildings and the seawall.
Before new construction work could be commenced, the existing circulating water system, supplying the remaining portion of 'A' station had to be diverted off the new site. This necessitated new outlet and inlet culverts and a temporary pumphouse, built offshore in steel sheet piling.
Some 3,000 cu. yd. of old mass concrete foundations had to be re- moved, as well as over 400 old timber piles and 250ft. of old sea wall, before the new piling foundations
could be started.
In addition, extensive grouting of the existing sea wall boulders was
carried out early in 1964 to reduce pumping in the area of the site to be excavated below tide level.
The new station, consisting of turbine house, boiler house and switchgear house, is all supported on 22in. diameter Vibro piling, averaging a depth of 90 ft. down to bedrock. Over 500 piles were driven in six months, using up to three 120ft. piling frames at a time.
300 ft. Chimney
Pile caps and other foundations contain over 6,000 cu. yd. of con- crete. The largest single unit was for the 300 ft. high reinforced concrete chimney, 45ft. x 45ft. x 8ft., being poured in two lifts.
New reinforced concrete water culverts pass under the turbine house floor to provide for the 'C' station and the remaining ‘A' station, or for
CROSS SECTION THROUGH BOILER
TURBINE & SWITCH ́E'D HOUSES
66 KV SHITÕNGE AÄ
OPERATING FLOOR
CABLE FLAT
TRANSFORMER BAY
ROADWAT
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