The Designing And Construction Of Storage Reservoirs by Arthur JacobThe Designing And Construction Of Storage Reservoirs by Arthur Jacob

The Designing And Construction Of Storage Reservoirs

byArthur Jacob

Paperback | February 4, 2012

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1873. Excerpt: ... depth of its centre of gravity below the level of the water and by the weight of a unit of water. Generally speaking, the unit adopted in calculations is a foot; and the unit of water being taken at a cubic foot, weighing 62.5 lbs., the resulting product from the multiplication of the three quantities will give the pressure in pounds on the surface immersed. Let it be sup Fig. 5. posed, for simplicity, that water to the depth of 10 ft. has to be sustained by a vertical rectangular wall, as in Fig. 5. It is usual to take but 1 ft. length of the wall for the calculation, though it will not affect the result whether 1 ft. or 100 ft. be the length assumed. We then have the surface under pressure = 10 sq. ft., the depth of the centre of gravity = 5 ft., and the weight of a cubic foot = 62.5 lbs., the product of which quantities gives us 3,125 lbs. pressure on 1 ft. length of the wall. But this pressure is not the whole of the force that the wall has to resist; the leverage that it exerts must also be taken into account. In the example under consideration--viz. that of a vertical plane with one of its sides coinciding with the surface of the water, as in Fig. 5--the whole of the pressure is so distributed as to be equal to a single force acting at a point one-third of the depth from the bottom. Thus, the total force to be resisted by the wall is 3125 X 3-33 = 10,406, which is the moment tending to overturn the wall. It is evident that a certain weight of the wall must be opposed to this overturning force; and as the height of the wall and the length are determined quantities, the thickness alone remains for adjustment. But as a rectangular wall in upsetting is considered to turn upon a single point, F, in the Figure--viz. the outer line of the wall--there will ...
Title:The Designing And Construction Of Storage ReservoirsFormat:PaperbackDimensions:20 pages, 9.69 × 7.44 × 0.04 inPublished:February 4, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217078796

ISBN - 13:9780217078795