Practical Designing of Retaining Walls With Appendices On Stresses in Masonry D
Practical Designing of Retaining Walls With Appendices On Stresses in Masonry D
Wm William Cain
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The horizontal water pressure for the height, h, is thus, _ X __ = _ h 2, and its moment about C is 525 Lh*X--h= Lh*. 5 3 15 Taking moments of W and water pressure about C, we have at once, 15 W 153 From the last two formulas, we derive the following results: h W AD DC 199 13978. 335 40. 49141 37. 58483 200 14112. 000 40. 70316 37. 79289 201 14246. 335 40. 91488 33. 00089 A seven-place logarithmic table was used throughout, the aim in the computations being to get the seventh significant figure... correct within one or two units. The necessity for this accuracy will be seen later. The distances EC and CB are now readily derived. ForA = 199, #C=82. 05624, C5 = 51. 27376; A=200, EC = 82. 49605, CB = 51. 50395; h = 201, EC= 82. 93577, CB= 51. 73423. On any plane, EB, the vertical unit pressure b 2 4b at E=pi= b 2 where b=EB, and W is the weight of masonry above the plane. This follows from the assumed "law of the trapezoid. " From these formulas we derive: At h = 199, pi = 177. 45483, p 2 =32.
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