Q 43
―
(1) Materials: The experiments referred to in last year's report which were made to obtain a suitable outside covering for protecting the steel pipe shells from corrosion were continued. A satisfactory method was found for the application of a concrete sheathing 2½" thick to the exterior of the pipes. The delivery of pipes and specials from England commenced at the end of April and was completed in October. A contract for the lining, sheathing, and welding of the pipes into composite lengths was let to The Hume Pipe (Far East) Ltd. in July, but processing was not commenced until September 17th as the preparation of the harbour bed was not sufficiently advanced. The contract called for a daily output of two composite pipes, each approximately fifty feet in length, and this output was steadily maintained until the end of the year. The valves, flexible joints, flexible tubing and pipe cutting machine arrived during the year.
(2) Preparation of Harbour Bed: This work was referred to in paragraph 213 (b) of last year's report.
*
Dredging—For the greater part of the year, Government grab dredgers Nos. 1 and 2 were employed dredging the foundation trench. Very difficult bottom was encountered in the first thousand feet from Queen's Pier and an additional dredger was hired from the Hong Kong & Kowloon Wharf & Godown Co. to increase the output. Blasting with dynamite and gelatine was tried in order to assist the dredgers, but the results were not satisfactory owing to the nature of the strata which consisted of a boulder clay. The total spoil excavated amounted to 33,212 cubic yards.
Formation of Bed—A contract for the formation of the rubble foundations 6,000 feet long, the construction of a protective rubble mound 2,900 feet long and the manufacture and setting in prepared positions of 350 reinforced concrete bearer blocks was let in February to the Netherlands Harbour Works Co. for the sum of $176,932.00. During the year 3,000 lineal feet of the foundation mound was prepared and 2,175 lineal feet of protective mound constructed: 299 bearer blocks were manufactured and 155 were set to correct lines and levels.
(3) Laying of Pipe Lines: A contract for laying the pipes on the harbour bed was awarded to Messrs. Woo Hing in September and work commenced on 16th November. Excellent progress was made with the work, and by the end of the year a total of seventy-six composite pipes had been laid.
(4) General: In order to protect the joints from corrosion experiments were carried out to investigate the possibility of injecting grease under pressure into a mould surrounding the joints. As a result of these investigations contracts were let to the Asiatic Petroleum and the Standard-Vacuum Companies for the supply of special greases, to the Fung Keung Rubber Company for the supply of rubber rings and to Messrs. Lee Tung Wo for the supply of cast iron moulds.
Expenditure
Expenditure to 31st Dec., 1938
$576,942.05 $581,801.12
239. Rapid Gravity Filters Eastern:-This was referred to in paragraph 214 of last year's report. Due to shortage of staff it was only possible to carry out preliminary designs and investigations.
Expenditure
$9,442.72
240. Kowloon Tsai Service Reservoir:-This work was referred to in paragraph 216 of last year's report. The design was completed during the year and a contract for the construction was awarded in October to Messrs. Kin Lee & Co. for $180,864.36. Work commenced in November and good progress was made with excavation, a total of 32,000 cubic yards of soft and 5,000 cubic yards of rock being removed by the end of the year. An indent for the reinforcing bars was sent to the Crown Agents in October.
Expenditure
Expenditure to 31st Dec., 1938
$19,726.87
$22,780.80
Q 43
―
(1) Materials: The experiments referred to in last year's report which were made to obtain a suitable outside covering for protecting the steel pipe shells from corrosion-were continued. A satisfactory method was found for the application of a concrete sheathing 24" thick to the exterior of the pipes. The delivery of pipes and specials from England commenced at the end of April and was completed in October. A contract for the lining, sheathing, and welding of the pipes into composite lengths was let to The Hume Pipe (Far East) Ltd. in July, but processing was not commenced until September 17th as the preparation of the harbour bed was not sufficiently advanced. The contract called for a daily output of two composite pipes, each approximately lifty feet in length, and this output was steadily maintained until the end of the year. The valves, flexible joints, flexible tubing and pipe cutting machine arrived during the year.
(2) Preparation of Harbour Bed: This work was referred to in paragraph 213 (b) of last year's report.
*
Dredging-For the greater part of the year, Government grab dredgers Nos. 1 and 2 were employed dredging the foundation trench. Very difficult bottom was encountered in the first thousand feet from Queen's Pier and an additional dredger was hired from the Hong Kong & Kowloon Wharf & Godown Co. to increase the output. Blasting with dynamite and gelatine was tried in order to assist the dredgers, but the results were not satisfactory owing to the nature of the strata which consisted of a boulder clay. The total spoil excavated amounted to 33,212 cubic yards.
Formation of Bed-A contract for the formation of the rubble foundations 6,000 feet long, the construction of a protective rubble mound 2,900 feet long and the manufacture and setting in prepared positions of 350 reinforced concrete bearer blocks was let in February to the Netherlands Harbour Works Co. for the sum of $176,932.00. During the year 3,000 lineal feet of the foundation mound was prepared and 2,175 lineal feet of protective mound constructed: 299 bearer blocks were manufactured and 155 were set to correct lines and levels.
(3) Laying of Pipe Lines: A contract for laying the pipes on the harbour bed was awarded to Messrs. Woo Hing in September and work commenced on 16th November. Excellent progress was made with the work, and by the end of the year a total of seventy-six composite pipes had been laid.
(4) General: In order to protect the joints from corrosion experiments were carried out to investigate the possibility of injecting grease under pressure into a mould surrounding the joints. As a result of these investigations contracts were let to the Asiatic Petroleum and the Standard-Vacuum Companies for the supply of special greases, to the Fung Keung Rubber Company for the supply of rubber rings and to Messrs. Lee Tung Wo for the supply of cast iron moulds.
Expenditure
Expenditure to 31st Dec., 1938
$576,942.05 $581,801.12
239. Rapid Gravity Filters Eastern:-This was referred to in paragraph 214 of last year's report. Due to shortage of staff it was only possible to carry out preliminary designs and investigations.
Expenditure
$9,442.72
240. Kowloon Tsai Service Reservoir:-This work was referred to in paragraph 216 of last year's report. The design was completed during the year and a contract for the construction was awarded in October to Messrs. Kin Lee & Co. for $180,864.36. Work commenced in November and good progress was made with excavation, a total of 32,000 cubic yards of soft and 5,000 cubic yards of rock being removed by the end of the year. An indent for the reinforcing bars was sent to the Crown Agents in October.
Expenditure
Expenditure to 31st Dec., 1938
$19,726.87
$22,780.80
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