Railways: Papers on the Mechanical and Engineering Operations and Structures Combined in the Making of a Railway ...J. Weale, 1846 |
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Railways. Papers on the Mechanical and Engineering Operations and Structure ... G. Drysdale D. 1859 Dempsey Keine Leseprobe verfügbar - 2015 |
Railways. Papers on the Mechanical and Engineering Operations and Structure ... G Drysdale D 1859 Dempsey Keine Leseprobe verfügbar - 2018 |
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12 inches 15 feet 30 feet 9 inches abutments adopted angle arch Architect's Journal ascending Birmingham Birmingham Railway bolted brick brick-work bridge Brunel built carriages cast iron centre chair Civil Engineer construction cost cross drains cross section cubic feet cubic yards culvert curves cutting descending diameter drains earth earth-works embankment Engineer and Architect's excavation expense face feet 6 inches feet per mile feet span flanches foot formed framing girders gradients height High Holborn inches inches square inches thick inclined increased inverts Kyanized latter load locomotive London and Birmingham longitudinal masonry material miles per hour North Union Railway parapet piers plane Plate radius rate of speed resistance retaining walls road Scale for Figs shown in figs side sleepers slope South Eastern Railway spandrils stone surface switch timber train trenails trusses tunnel velocity vertical viaduct waggons Western Railway wheels wide gauge width of gauge wrought iron
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Seite 30 - I am not by any means prepared at present to recommend any particular size of wheel or even any great increase of the present dimensions. I believe they will be materially increased, but my great object would be in every...
Seite 87 - ... much exposed to the weather, and alternately wet and dry, the mere coagulation of the sap is not sufficient; for although the albumen contained in the sap of the wood is the most liable and the first to putrefy, yet the ligneous fibre itself, after it has been deprived of all sap, will, when exposed in a warm, damp situation, rot and crumble into dust. To preserve wood, therefore, that will be much exposed to the weather it is not only necessary that the sap should be coagulated, but that the...
Seite 80 - Dantzic deal (Kyanized): the lengths vary from 46 feet to 20 feet, by 11 inches wide and 3 inches thick : they are so disposed, as that the first course of the rib is two whole deals in width, the next is one whole and two half deals, crossing the joints longitudinally as well as in the depth. Each rib consists of fourteen deals in thickness, bent over a centre to the required form, and secured together by oak treenails l\ inch diameter at intervals of 4 feet apart, each treenail traversing three...
Seite 73 - He considers the method of filling towards the wall from the natural bank behind, to be highly objectionable ; the material lies in strata at the angle at which the deposit is made ; as the quantity increases, the subsidence commences, and the earth slides downwards, throwing its whole weight against the back of the wall. The tendency to slide is frequently accelerated by the natural form of the ground upon which the earth is thrown, as it not unfrequently inclines towards the wall, in which case...
Seite 84 - The air-pump is 10 inches diameter, and 15 inches stroke. Its construction is of the ordinary kind. The author gives, in an appendix to the paper, a minute description of the various parts of the apparatus, with the details of their dimensions and weight. The process is simple and rapid : the corrosive sublimate is first mixed with warm water in a trough, in the proportion of 1 Ib. of the former to 2...
Seite 134 - Road shall not be more than one foot in 30 feet ; and of any other public Carriage Road not more than one foot in 20 feet ; and that a good and sufficient fence, of four feet high at the least, shall be made on each side of every Bridge which shall be erected.
Seite 84 - Ib. of the former to 2 gallons of the latter ; the clear solution is then poured off into the reservoir, where water is added till it is diluted to the proper point, which may be ascertained by a hydrometer. A more perfect test is the action of the solution upon silver, which it turns brown at the requisite degree of saturation. The operations of exhaustion and pressure employ eight men for five hours, the whole process occupying about seven hours, during which time from 17 to 20 loads are kyanized...
Seite 113 - It was specified that this heading should be driven through before any part of the tunnel was commenced, and supported and kept open during the execution of the entire work by sufficient timbering. In commencing the works of the Saltwood tunnel, already referred to, great difficulty was encountered from the great quantity of water in the lower green -sand which the tunnel intersects. The course adopted was to make a heading or adit quite through the hill on a level with the bottom of the tunnel,...
Seite 104 - The bridge described in this communication, is situated about three miles from Dublin, over an excavation of 36 feet in depth ; its span is 84 feet in the clear, and the two lattice beams are set on edge parallel to each other, resting at either end on plain stone abutments built in the slope. These beams are 10 feet in depth, and are formed by a series of flat bars of wroughtiron, 2£ inches wide, and f inch thick, crossing each other at an angle of 45°.
Seite 83 - Each end is strengthened by five parallel cast-iron girders, whose extremities are held by wrought-iron straps, riveted on to the circumference of the tanks. Notwithstanding the great strength of these girders, several were broken by the pressure applied during the process. The...