235. North Point Blockyard. The casting yard was extended by approximately 2,000 square yards of 6 inch thick reinforced concrete slab in order to enable it to cope with the large volume of work in hand.
236. Beams, bracings, rocker pile bases, waling brackets, pedestals, piles, landing stages and platforms were all cast for the new Ma Tau Kok Ferry Pier and Kowloon Public Pier in the Blockyard. In addition, 246 18-ton blocks and 237 24-ton blocks for sea walls at Ma Tau Kok and Sung Wong Toi Road were prepared.
237. Invert sections for the box culverts at Sung Wong Toi Road were precast in the blockyard and then taken to the site at Sung Wong Toi where they were placed between tides on a prepared rubble foundation.
238. Other minor works completed in the blockyard included 3-ton and 5-ton mooring blocks for the Urban Services Department and small marker beacons for erection in Causeway Bay Typhoon Shelter.
239. Survey. The survey section was fully employed on many diverse types of surveying including both land and marine work. All the work described in the preceding paragraphs was set out and the earth quantities measured by this section.
In addition, preparatory surveys were carried out for design purposes such as a survey of the foreshore from Gin Drinkers' Bay southwards to include Tsing Chau Island, and soundings of an area 6,000 feet by 4,000 feet for the siting of the new Refuse Dump. Sea current strength observations were also carried out to estimate the probable future current rate due to the proposed marine obstruction at the same site. Many soundings and levels were taken before and after dredging and in connexion with reclamations, land excavations and sea wall constructions. Progress surveys were also kept up-to-date of public dumps at Sung Wong Toi, Ngau Chi Wan, Cheung Sha Wan and Hung Hom Bay and investigations of reported underwater obstructions off Kai Tak Airport, Causeway Bay Typhoon Shelter, etc., were carried out.
Page 60
Page 61
Materials Testing Laboratory
240. The Laboratory widened its scope still more during the year with an increased number of tests carried out not only for the Department but also for outside firms. No less than 4,600 were made on the compressive strength of concrete and this included 218 tests for outside firms and 1,181 for the Tai Lam Chung Dam. In addition tests were also carried out on cement, the flexural strength of concrete beams, sieve analysis of aggregates, percussion strength and organic impurities of aggregates, extraction tests on tar macadam and tar tops from the Government quarries, and tests on bitumen, asphalt, roofing tars, and crude oils.
241. Soil tests amounted to 569 and included major jobs such as the following:-
(a) Settlement analysis for Tai Kok Tsui drainage scheme;
(b) Foundation soil investigations for the American Consulate Building and for the Wing On Building;
(c) Soil investigation for the Tai Po Road Slow Sand Filters.
242. In order to enlarge the scope of the Laboratory still further an Indent for steel-testing equipment was placed with the Crown Agents.
ROADS OFFICE
Chief Engineer, R.A. Mirams, A.M.I.C.E., A.M.I.W.E.
General
243. Exceptionally good weather permitted a full programme of works to be carried out and, in addition to routine maintenance of the roads and bridges, particular attention was given to the improvement and reconstruction of major roads and junctions to a standard suitable for the ever increasing volume and weight of traffic.
45
235. North Point Blockyard. The casting yard was extended by approximately 2,000 square yards of 6 inch thick reinforced concrete slab in order to enable it to cope with the large volume of work in hand.
236. Beams, bracings, rocker pile bases, waling brackets, pedestals, piles, landing stages and platforms were all cast for the new Ma Tau Kok Ferry Pier and Kowloon Public Pier in the Blockyard. In addition, 246 18-ton blocks and 237 24-ton blocks for sea walls at Ma Tau Kok and Sung Wong Toi Road were prepared.
237. Invert sections for the box culverts at Sung Wong Toi Road were precast in the blockyard and then taken to the site at Sung Wong Toi where they were placed between tides on a prepared rubble foundation.
238. Other minor works completed in the blockyard included 3-ton and -ton mooring blocks for the Urban Services Depart- ment and small marker beacons for erection in Causeway Bay Typhoon Shelter.
239. Survey. The survey section was fully employed on many diverse types of surveying including both land and marine work. All the work described in the preceeding paragraphs was set out and the earth quantities measured by this section.
In addition, preparatory surveys were carried out for design pur- poses such as a survey of the foreshore from Gin Drinkers' Bay southwards to include Tsing Chau Island, and soundings of an area 6,000 feet by 4,000 feet for the siting of the new Refuse Dump. Sea current strength observations were also carried out to estimate the probable future current rate due to the proposed marine obstruction at the same site. Many soundings and levels were taken before and after dredging and in connexion with reclamations, land excavations and sea wall constructions. Progress surveys were also kept up-to-date of public dumps at Sung Wong Toi, Ngau Chi Wan, Cheung Sha Wan and Hung Hom Bay and investigations of reported under- water obstructions off Kai Tak Airport, Causeway Bay Typhoon Shelter, etc., were carried out.
44
Pace 60Page 61
Materials Testing Laboratory
240. The Laboratory widened its scope still more during the year with an increased number of tests carried out not only for the Department but also for outside firms. No less than 4,600 were made on the compressive strength of concrete and this in- cluded 218 tests for outside firms and 1,181 for the Tai Lam Chung Dam. In addition tests were also carried out on cement, the flexural strength of concrete beams, sieve analysis of aggre- gates, percussion strength and organic impurities of aggregates, extraction tests on tar macadam and tar tops from the Govern ment quarries, and tests on bitumen, asphalt, roofing tars, and crude oils.
241. Soil tests amounted to 569 and included major jobs such as the following:-
(a) Settlement analysis for Tai Kok Tsui drainage scheme; (b) Foundation soil investigations for the American Con-
sulate Building and for the Wing On Building;
(c) Soil investigation for the Taipo Road Slow Sand Filters.
242. In order to enlarge the scope of the Laboratory stil! further an Indent for steel-testing equipment was placed with the Crown Agents.
ROADS OFFICE
Chief Engineer, R.A. Mirams, A.M.I.C.E., A.M.I.W.E.
General
243. Exceptionally good weather permitted a full programme of works to be carried out and, in addition to routine maintenance of the roads and bridges, particular attention was given to the improvement and reconstruction of major roads and junctions to a standard suitable for the ever increasing volume and weight of traffic.
45
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