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Problem 80: without the given hint and from all the conditions provided, I think I would like to use Rankine theory to solve it. Can the Rankine theory be used for this problem? Problem 86: to get the height, h, of the pivot point above the bottom tip of the bulkhead, the solution use the...

Sorry, I made a mistake in typing. The equation is 36.15, I think it shoud be gamma-dry instead of gamma in the second term. Can anyone tell me for the given pile length is 140ft, why is beta 0.3 selected in problem 63? Thanks

When considering the effects of water table, CERM use submerged density γb=γd-62.4, why not use γwet (or γsat if submerged) instead of γd here. The problem 49, 55 and 56 in 6-min solutions use γwet-62.4 to get the submerged density. In Eq 35.15 (B) in CERM, the γd should be used instead of γ in...

1. In Problem 54. The answer is 1.643 (A) using the round up number (qmax) 5400 during the calculation. However, I got 1.652 (B) using qmax 5371. Hopefully, such close answers won't be shown in the real exam. 2. Problem 58, the final step is to get factor of safety. Why the actural (net)...

Ktulu, Would you please tell me which table provides the more precise factors? I just wonder I have an out of date version.

one practice problem is attached. Can someone solve it and explain why the angle is not given here ? Is the readings are from the standard method? The solution will be posted if someone needs.

Ws(borrow)=Ws (fill) Dry density (borrow)x Volume (borrow) = Dry density (fill) x Volume (fill) You have Dry density (borrow)=SG x water density/(1+e), Dry density (fill) required, Volume (fill) =1 ft^3, you'll get Volume (borrow) .

Venpr, Thanks. That's good. The equation is shown in his another book, too. Anyway the chart is much easier to use.

I have a question on calculating the increase in stress under square foundation, when soil are layered. In Das' Foundation of geotechnical engineering ', Sec 7.12, there is an equation, delta(sigma)average=(delta(sigma)top+4*delta(sigma)mid+delta(sigma)bottom)/6 In another similar problem...

use this formula, (1-min/in-place)/(1-min/max), you'll get the answer