ENGINEERING AND
EAST AND WEST
HONG KONG DAILY PRESS, SATURDAY, OCTOBER 24, 1931.
BUILDING
COMPACTING AN EMBANKMENT.
PORTUGUESE CONTRACT FOR subjects for discussion comprise NEED FOR A REVISION OF
VICKERS.
cleaning and preparation, hydro- gonation, by products, fertilisers, low and high-temperature carboni-
METHODS.
The conclusion has been arrived railway and steamship fuel sincke at that there is need for revision abatement and dust removal, clas sification, competition between colour methods of constructing on- id mis.bankments and of calourating their
and construction methods are large- lope. Highway grading practice an inheritance from past railway
The last contract in connection with Portugal's naval re-organisation, gasification, combustion, tion was signed on August & be twear the Portuguese Government and the British Vickers concern for the supply of the gunnery equip. ment for the twelve wärships which are now being built. It is stated that some ninety guns are involved in the contract, the value of which is £700,000,
and other fuels, storage, a cellaneous matters. Contributions slope... to the proceedings are to bo mude by Mosers. W. R. Chapman, J. I. Graham, D. G. Skinner, and P. C, Pope, Dr. M. Barash, E. Practice, and the attitude of eng Grumell and W. H. Cadman, Pro-acers and contractors towards plac LOCOS FOR THE GOLD COAST, fessura A. W. Nash, W. A Bone, ing embankments has been largely
and H. G; A. Hickling, and other influenced by this inheritance. British representatives,
The North British Locomotive Co., Ltd, have been awarded a contract for the supply of five Jocomotives for the Gold Coast Government Railways, to the order of the Crown Agents for the Colonies.
PROJECTED. BRIDGE. AT"
ARGENTINA..
POWDERED FUEL FOR
JAPANESE STEAMER.
Mesure. Clarke, Chapman and Co., Ltd., of Gatehend-on-Tyne, whose powdered fuel plant in the pioneer ship, the steamer Berwind Jon, han ovoked such interest as the result of the publication of the figures of the first fourteen months' performance of this vessel, have just received an order for the pulveriser plant for a Japanese cargo and pas senger ship, for the Harima Dock
The Departamento de Estudios y Obras del Riachuelo has laid be- fore the Minister of Public Works, Buenos Aires, Argentina, a project for the construction of a new yard. hidge over the River Riachuele, "The steamer to be equipped will to replace that now known as thebo fitted with three single ended Alsina Bridge, which is no longer Scotch marine boilers, each boiler able to cope with the road traffic between the city and province of Buenos Aires: It is stated that the projected bridge will be 557ft, long and 78.ft. wide. Its construction is
The Use of Rollers.
MAN WHO FOUND RAND
GOLD.
UNREALISED CHANCE OF
IMMENSE WEALTH, AS
Struben, who has died, aged 80, at Mr Frederick Pine Thooptilus Spitehwick, Maner, near Ashbur ton, Devon, played a romantic part in the discovery of the Rand Gold Mines
evory engineer: 18 aware, ade juste "compaction can be obtained by the no of various types of rollers but the committee referred to úbove point out that there is need for general revisions of spec Acations for rollors which will ost was his genius that made the discovery of Tho., Rand reof pos
press weights in terms of load persible, that led to the rubl of 1656, lineal inch rather than gross weight and that was distrusted by mis companions so that the part, An of roller. Other types of compac- his own words, missed the chance tion plant, such as wheel and track of buying the whole of the gold- type equipment, havo besa, meng
bearing farma of the Rand for a
In 1883, after years spent in" fully used for the
compaction of
Campaigning care-free with "burg- embankments of certain types and two sans of a senior magistrate in her Mr. Struben, the younger of in certain localities.
In their view, however, close in-
vestigations should be made with per weight pressures of compaction the object of determining the pro-
equipment for various types of soils. At the same time, regard Leas of the method of compaction, the use of a power-driven mecha A committee of prominent publicoical device for spreading the fi works contractors has gone thor evenly in layers is essential if the oughly into this aspect of the sub-best results are to be obtained ject, and agrees that the need for compacting railway fills was not great because the railway road bed was flexible, whereas the highway Pasement must be maintained at the same elevation without filling on the surface. They have agreed, also, that the assumption that the action of the elements and traffic will bring about the complete settlement of an uncompacted em- bankment in two or three years is usually incorrect,
Artificial Compaction Needed.
ments are necessarily slow, and In that case, since natural settle
traffic and the elements,
cannot be depended upon to produce complete and uniform settlement, even over considerable period, artificial
With certain types of soil, it is pointed out, effective compaction can be obtained by the introduc tion of water into the All, but fur ther information as to the types of soll with which that method, could. that should be supployed, would be be used, and the amount of water
valuable.
Whatever be the materials used for making an embankment, it is obvious that there must be voids. might amount to 50 per cent of Indeed, with some materials these
the total volume of the mass. In ordinary excavation work the use of machine diggers generally tends to increase the percentage of empty
material into clods or compound space in the fill, by breaking up the
particles. This is particularly trus when heavy soil is excavated in 'a. more or less dry state.
having three furnaces. The heating surface for each boiler will be 2,830 sq. ft. and the working steam pres sure 223 lbs. per square inch. The powdered fuel plant will consist of three Clarke, Chapman "Resolutor". pulverisers, each capable of dealing compaction methods must be em.settle after placement depends on with approximately 15 cwts of coil. THERMAL POWER STATIONS per hour. Each pulveriser will are played it settlement in to bo obtain
extinted to cost 3,000,000 dols,
IN CANADA.
one boiler by means of threeed before the road surfacing is Woodeson" patent turbulent flame carried out. As the nature of soils burners. The Clarke, Chapman pavaries widely, even in small areas, tent ring main system of distribu- tion will be used.
a knowledge of the character of the material to be compacted, as well as of the materials on which it is to be paced, is necessary before the engineer can decide with ac curacy on the best method of com- paction.
TRANSFORMERS FOR SOUTH
AFRICA,
the City of Johannesburg in res- Fourteen tenders were received by
ponaq to their call for tenders for
Actually, the major source of trouble in embankment construc
From this it follows that the amount which an embankment will
the percentage of voids in the toil the moisture content of the mass, mass, the nature of the materials;
and the methods which have been used to increase its density. When proper compaction methods are not used, it is unlikely that the m bankment will settle mach during. the first year or 20, simply because the large voids in newly construct ed: fills ordinarily preclude capil Jary action,
The surface orasta over and pre- vents the entrance of sufficient sur. face water to allow the clods to settle. Frost action only extends a few inches or so beneath the sur
"While by far the greater portion of the electrical energy generated in Canada is derived from water power, there are certain parts of the country in which it is more economical to utilise local fuel sup- plies for electricity production, Thermal power plants are now operating in British Columbia and in Nova Scotia, The first, the Sentinel plant of the East Koote uny Power Company, Limited, near Blairmibee, in the Crow's Nest 2-1500 K.V.A.S.P. transformers and tion has been the failure to enforce face, and traffic simply helps to Pass, between Alberta and British as a result of the adjudication this Columbia, supplies current to the contract was placed with a United actual thickness of the layer of any rent effect in settling the mass the specification as regards the compact the surface without having mises at Kimberley, British Column- bin, while the second, the Sea Kingdom Arm, Metropolitan Vick-oose material placed and the beneath. In course of time, how- board power station" of the Domi- ers Electrical Export Co., Ltd.. method of compaction required, ever, the lower portion will settle nion Stool and Coal Corporation, It is interesting to note that the The method advocated depends and leave an arched void under the produces power for use at the local tender submitted by the United chiefly on correct laboratory ding surface, which will probably give vollieries and also in Sydney, Nova |
nosis before construction and Intel-way under some heavy load and so Scotia, A further steam power Kingdom firm was the lowest ro-ligent and even specialist control cause considerable" trouble, station has quite recently been ceived although competition for the of the work,
pense, and delay.
..
brought into commission by the order was forthcoming from Ger
New Brunswick Electric Power
of the many, Austria and Sweden.
.Commission, the owners
Musquash hydro-electric plant in
southern New Brunswick, at Grand
Lake, in the Minto coalfield, New SOLON, ELECTRIC SOLDERING
Brunswick Tho new plant, which
was commenced last, autumn, has
IRON.
To judge the temperature of a soldering iron and thus ensure that the work will be properly done is a difficulty with which nodel makers and other amateurs
a total capacity of 1000 Ew. Power will be supplied by means of over head transmission lines to Frederic ton, and will also be distributed in contral New Brunswick, a rich farming area. It should, perhaps, be pointed out, that streams from which, water power could be derived have to contend. With the object are fricking in central New Bruns of overcoming this difficulty with wick, and that, somo time ago, the
INTERNATIONAL CONFERENCE
_ON_BITUMINOUS COAL
numerous
Com
Miato collieries were in need of greator ense the Solon electric enlarged markets for their output. soldering iron has recently been put:
on the market by Messrs. W. T. Henley's Telegraph" Works 4 pany, Limited, Holborn Vinduct, London, L.C. This iron is made
for two voltage ranges, 200 to 220
The third International Confer
|and 230 to-930, and is rated at 65 enoo on Bituminous Coal will be watts It is about, 12,in long and beld at the Canegie Institute of weighs 1 lb An important point is Tedmology Schenley Park, Pitts that it is tinued ready for use when burgh, Pennsylvania, USA from
November 10 to 21 next. A proli supplied and that it is not neces minary programme; has been issusary to re-tin the tip every time
and it is therein stated that the work has to be done,
These Gorgeous Blondes and Brunettes in the Fox Picture “ Women of All Nations showing to-morrow of the
King's look what they did to 1 Brandel
LX-
|
Natal, stumbled upon the gold of his dreams. Aga T
It all came about through know.
ing a man called Geldenhuis, who the "Rand was then called, owned a farm 38 miles south of Pretoria on the Witwatersrand -as
Gold Therese li and see his farm. He added: "Its Geldenhuis asked him to eame rock formation seems like one of your gold-bearing rocks. They rode togethen through ravines to the form, where they found the clearest indications, of guld. That was in December, 1883.
died
Mr. Strabon stated befors he
If my friends had not insisted in regarding me as those gold-bearing farma,"
fool might have been posscasors
Dpyright
1. B. AtkinsoA.. Race Lives Member of the C.M; A.“
Wo
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