Answered: Question 4 In the soil profile shown…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Please answser parts a, b, c, and d

Appendix
Vw.
;e =
Sr =
V,
Vs
M5 = G,VsPw; Mw = wMs
GSYW
Ya =
1+e
(Gs – 1)Yw
y'
1+e
(1+ w)YwGs
1+ wGs
Cc = 0.009(LL – 10)
Ysat =
Cyt
T,
Har
n (U%\2
For 0 <U< 60%, T, = 7 (100,
For U > 60%, T, = 1.781 – 0.933 log(100 – U%)
C.H
- log
1+e,
C,H
o, +Ao'
S.
- log
%3D
1+e,

Transcribed Image Text:Question 4 In the soil profile shown below, the clay is normally consolidated and H;=9m, H2=5m, H;=3m. The depth of water table is then decreased so that H;=2m, H2=12m, H3=3m. a) Calculate the overconsolidation ratio (OCR) at this stage. When a surcharge of Ao = 180 kPa applied to the surface. b) Estimate the primary consolidation settlement of the clay layer. c) Estimate the degree of consolidation will be after 40 days? d) How many days would it take for 90% consolidation? Soil characteristics are as follows (use appropriate relations from the Appendix, Yw = 9.81 kN/m³): • Sand: e = 0.56; Gg = 2.6 • Clay: LL = 63; e = 0.83; G, = 2.77; C, =Cc; C, = 6.66 x 10-4cm²/s H Sand Groundwater table Sand H2 Clay Void ratio = e Normally consolidated H3 Sand

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