Practical Designing of Retaining WallsD. Van Nostrand Company, 1908 - 177 стор. |
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Загальні терміни та фрази
active thrust actual thrust angle of friction angle of repose ascer assumed base centre of pressure computed construction corresponding planes counterforts cubic foot depth direction distance draw E₁ earth level earth slopes earth-thrust eh² Engineering equal experiment factor of safety feet formula foundation friction of earth given gives horizontal thrust inclined inner face inner toe intersection joint K₁ length level at top Leygue Leygue's limiting plane masonry mass of earth maximum thrust middle third multiply natural slope outer toe perpendicular plane AC plane of rupture pounds prisms of rupture Rankine's represent resistance resultant retaining-wall sand stability surcharge surface of rupture surface sloping tan² theory thrust exerted thrust on 40 tion top slope top surface triangle true thrust uniformly unit pressures vertical plane wall leans wedge of rupture weight per cubic
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Сторінка 22 - ... four joints of the arch ring, splitting it into five parts : in flat arches the upper parts sliding downwards and two parts on either side sliding outwards; in pointed arches the upper part sliding upwards and the other two sliding inwards. To avoid this the resultant pressure at any joint should not make with the normal to the joint an angle greater than the angle of repose. Radiating joints will generally fulfil this condition ; if not, the direction of the joints can be easily changed. 183....
Сторінка 18 - ... F. The figure shows also the intensity of the strain in pounds at these points, obtained by multiplying the total area above DF by 125, the assumed weight in pounds per cubic foot of masonry, although the calculations were actually made in units of volume, for the sake of rapidity and ease, counting the weight of a cubic foot of masonry as 1, and that of water as \. We next proceed in the same way in regard to E C. Here we have first the point where the line passing through the center of gravity...
Сторінка 36 - It is necessary to the stability of a granular mass, that the direction of the pressure between the portions into which it is divided by any plane should not, at any point, make with the normal to that plane an angle exceeding the angle of repose. This principle will alone enable us to ascertain the earth-thrust against any plane without resorting to a special principle, like Coulomb's