Design of Small DamsU.S. Government Printing Office, 1977 - 816 pages |
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Common terms and phrases
abutments amount ANDESITE asphaltic concrete auger basin Bureau of Reclamation channel characteristics clay coarse coefficient compacted computed concrete Construction Materials crest curve cutoff trench damsite deposits depth determined discharge downstream slope drill earth earthfill dam embankment engineering estimates excavated factors feet filter fine-grained flow Foundations and Construction grains gravity gravity dams grout hole horizontal hydrograph igneous rocks impervious impervious core inches inflow design flood laboratory layer liquid limit loess ment metamorphic rocks method minerals minimum obtained particles penetration percent permeability pervious foundations pipe plastic precipitation pressure probable maximum procedure rainfall reservoir reservoir water riprap River rock rockfill dams runoff runoff curve samples sand and gravel second-feet seepage shown in figure sieve silt small dams Soil Classification spillway square miles storage storm stream structure tailwater terial test pits thickness tion unitgraph upstream slope usually values vertical water content water surface watershed weight zone
Popular passages
Page 659 - A-2 will provide concrete that is amply strong and durable if the amount of water added at the mixer is never large enough to make the concrete overwet. These mixes have been predetermined in conformity with recommended procedure by assuming conditions applicable to the average small job, and for aggregate of average specific gravity.
Page 21 - Like those in the last century who tilled a plot of land to exhaustion and then moved on to another, we in this century have too casually and too long abused our natural environment. The time has come when we can wait no longer to repair the damage already done, and to establish new criteria to guide us in the future.
Page 200 - The ratio of the weight in air of a given volume of a permeable material (including both permeable and impermeable voids normal to the material) at a stated temperature to the weight in air of an equal volume of distilled water at a stated temperature.
Page 601 - BULKING The increase in volume of a material due to manipulation. "Rock* bulks upon being excavated; damp «sand* bulks if loosely deposited, as by dumping, because the "apparent cohesion" prevents movement of the "soil* particles to form a reduced volume.
Page 606 - D (L) — the diameter of a hypothetical sphere composed of material having the same specific gravity as that of the actual soil particle and of such size that it will settle in a given liquid at the same terminal velocity as the actual soil particle. equivalent fluid — a hypothetical fluid having a unit weight...
Page 661 - Crane or other means of placing material in pile in units not larger than a truck load which remain where placed and do not run down slopes. Objectionable Methods which permit the aggregate to roll down the slope as it is added to the pile, or permit hauling equipment to operate over the same level repeatedly. Permissible But Not Preferable Bulldozer stocking progressive layers on slope not flatter than 3...
Page 662 - IMPROPER OR LACK OF CONTROL AT END OF ANY CONCRETE CHUTE, NO MATTER HOW SHORT. USUALLY A BAFFLE MERELY CHANGES DIRECTION OF SEPARATION. CONTROL OF SEPARATION AT THE END OF CONCRETE CHUTES THIS APPLIES TO SLOPING DISCHARGES FROM MIXERS, TRUCK MIXERS, ETC.
Page 603 - Definition 2.1 unconfined compressive strength — the load per unit area at which an unconfined prismatic or cylindrical specimen of soil will fail in a simple compression test.
Page 27 - USC 777a-777k). the Bureau of Sport Fisheries and Wildlife of the Department of the Interior...
Page 609 - ... see modulus of elasticity. modulus of elasticity (modulus of deformation), E, M (FL~2) — the ratio of stress to strain for a material under given loading conditions; numerically equal to the slope of the tangent or the secant of a stress-strain curve. The use of the term modulus of elasticity...