Calculate the consolidation settlement in clay layer depending on an increment in stress level of AP=150KN/m² for the given figure. Notes: Pre-consolidation pressure, Po=200KN/m2 Y=17KN/m3, y2=20KN/m3, y3=19KN/m3, Ywater 10kN/m3, Initial void ratio, eo=0.8, Swelling&compression curve parameters, Cc=0.25, c,=0 05

Calculate the consolidation settlement in clay layer depending on an increment in stress level of AP=150KN/m² for the given figure. Notes: Pre-consolidation pressure, Po=200KN/m2 Y=17KN/m3, y2=20KN/m3, y3=19KN/m3, Ywater 10kN/m3, Initial void ratio, eo=0.8, Swelling&compression curve parameters, Cc=0.25, c,=0 05

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter15: Braced Cuts

Section: Chapter Questions

Problem 15.6P

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3.A half-closed clay layer is 8 m thick and it can be assumed that cv ¼ ch. Verticalsand drains 300 mm in diameter, spaced at 3 m centres in a square pattern, areto be used to increase the rate of consolidation of the clay under the increasedvertical stress due to the construction of an embankment. Without sand drainsthe degree of consolidation at the time the embankment is due to come into usehas been calculated as 25%. What degree of consolidation would be reachedwith the sand drains at the same time?
A 3.75 m thick clay layer (drained on one side) is normally consolidated. When the pressure increase from 50 KN/m2 to 150 KN/m2 , the void ratio decreases from 0.9 to 0.75.For the clay Cv=0.24 cm2/sec.a. Interpret the time in days for the clay layer to reach 50% consolidation. b. Interpret the settlement at that time i.e, at 50% consolidation.
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