percent strain on consolidation tests for 2 to 1 method
percent strain on consolidation tests for 2 to 1 method
(OP)
i posted this question before and no one replied... am i not clear or does no one know what im talking about?
when calculating settlement with the 2 to 1 method the percent strain versus the pressure is needed... now do we need to take the "log" of the pressures similar to calculating the Cc and Cs(Cr)? or do we just care about the percent change over the related pressures?
thanks
when calculating settlement with the 2 to 1 method the percent strain versus the pressure is needed... now do we need to take the "log" of the pressures similar to calculating the Cc and Cs(Cr)? or do we just care about the percent change over the related pressures?
thanks





RE: percent strain on consolidation tests for 2 to 1 method
Another method is the Schmertmann method. You don't need to compute the "stress" increase in this method. You can also use other elastic formulas where you have correction factors for rigidity of footing, corner and centre of footing, etc. These are given in Bowles. Other methods are also available.
The above deals with "elastic sands" where the applied loading is nearly linear - not towards the failure load. It also will be good for immediate clay settlements. For clays you will need, though, your consolidation computations (with the stresses determined by your 2:1) method for determining the consolidation settlements. See any good soils text on these issues. and then, there is creep settlement, etc. Many pages of books and numerous papers dealing with this subject.