Minutes of Proceedings of the Institution of Civil Engineers, Volume 132The Institution, 1898 - Civil engineering Vols. 39-204 (1874/75-1916/17) have a section 3 containing "Abstracts of papers in foreign transactions and periodicals" (title varies); issued separately, 1919-37, as the institution's Engineering abstracts from the current periodical literature of engineering and applied science, published outside the United Kingdom. |
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amperes apparatus Author boilers bottom boulder clay C.E. VOL caisson carried cement cent centimetres centre clay concrete connected construction cordite cost cubic feet cubic foot cubic metres culvert cylinder depth discharge drainage drains dynamo dynamometer earthen dams earthwork electric embankment engine evaporation excavated experiments flood foot gallons girders gradient gun-cotton heat hydraulic inches incline increased India interstices irrigation JOHN WOLFE BARRY kilograms length load lower machine masonry material maximum metres miles millimetres Minutes of Proceedings mortar obtained Paper pass pier pipes placed plate pressure Proceedings Inst puddle trench pulleys pumps rails railway rainfall reel reservoir revolutions per minute river rock rope sand shaft side silt slide slip slope soil speed square steam steel stone supply surface tank temperature thick Thompson River tons valves vertical wall Waltham Abbey waste-weir watertight weight weir
Popular passages
Page 157 - General Causes affecting the Stability of Earthwork. — Earthwork gives way by the slipping, or sliding, of its parts on each other. The resistance to this is due partly to the friction .between the particles, and partly to their mutual adhesion or cohesion. The friction...
Page 157 - Tbe properties of earth with respect to adhesion and friction are so variable, that the engineer should never trust to tables or to information obtained from books to guide him in designing earthworks, when he has it in his power to obtain the necessary data either by observation of existing earthworks in the same stratum, or by experiment.
Page 182 - Earthen x dams rarely fail from any fault in the artificial earthwork, and seldom from any defect in the natural soil ; the latter may leak, but not so as to endanger the dam ; in nine-tenths of the cases the dam is breached along the line of the water-outlet passages.
Page 146 - ... layers are made to slope downwards towards the wall ; the steeper the slope, the greater will be their pressure. If, however, the wall is to be freed from earth pressure, the layers are made to slope downwards away from it. The same thing occurs in Nature. " The stability of sedimentary rocks in the side of a cutting is greater when the beds are horizontal, or dip away from the cutting, than when they dip towards it.
Page 189 - Rankine 1 states that the proper form for the line of pressure is the elliptic linear arch, in which the ratio of the half-span to the rise shall not be less than the square root of the ratio of the horizontal to the vertical pressure of the earth. He adds that the entire ellipse may be used as the figure of the arch, or, if necessary, the bottom may consist of a circular segmental inverted arch having a depression of about one-eighth of the span. Another form which is generally adopted is the ovoid...
Page 157 - There is a mathematical theory of the combined action of friction and adhesion in earth ; but for want of experimental data its practical utility is doubtful.
Page 157 - ... into account. In nearly all earthworks the practice is to treat the material as homogeneous from top to base, and to adopt a uniform slope throughout. The lower portions in a large dam must, however, be in a very different condition to that of the upper ones, as they are much more highly compressed and are moister.
Page 162 - The toes, if formed of trap dry-stone, which has a specific gravity of 2 '50 and a co-efficient of friction of 0-71, compared with 1-60 and 0-50, the relative figures for moist clay, will have a frictional resistance about 2^ times that of the latter. To give them cohesion and to prevent on the upstream face the inflow of water, which would lessen the effective weight, the drystone * should be packed solid with clayey muram, which will also considerably increase its frictional resistance. The stone...
Page 291 - Concrete is to be made of 1 part of Portland cement, 2 parts of sand, and 4 parts of stone broken so as to pass through a 2-in.
Page 158 - From these considerations may be deduced that, in an originally homogeneous high earthen dam with plane slopes, the resistance to slipping decreases with the height from the top, and that the proper section for it is one having the slopes continuously flattened towards the base. An " empirical section " based on these principles is shown in dotted lines on Plate 5, Fig.