The following figure shows a uniformly distributed load applied at the ground surface. A sample was obtained from the center of the clay layer, and the consolidation test results are shown below.Given:Δσ = 2,000 psfH1 = 10 ftH2 = 10 ftH3 = 40 fteo(clay) = 1.25γdry(sand) = 110 lb/ft3γsat(sand) = 115 lb/ft3γsat(clay) = 120 lb/ft3Consolidation Test Resultseσ' (tsf)1.2100.251.1900.51.15011.08020.98040.87580.769160.664320.70680.74820.7900.5a) Determine the compression index, Ccb) Calculate the primary consolidation settlement for the clay layer H1Groundwater tableH2Void ratio = eH3O SandE Clay

Answered: The following figure shows a uniformly…

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.5P

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The following figure shows a uniformly distributed load applied at the ground surface. A sample was obtained from the center of the clay layer, and the consolidation test results are shown below.

Given:

Δσ = 2,000 psf

H₁ = 10 ft

H₂ = 10 ft

H₃ = 40 ft

e_o(clay) = 1.25

γ_dry(sand) = 110 lb/ft³

γ_sat(sand) = 115 lb/ft³

γ_sat(clay) = 120 lb/ft³

Consolidation Test Results

e	σ' (tsf)
1.210	0.25
1.190	0.5
1.150	1
1.080	2
0.980	4
0.875	8
0.769	16
0.664	32
0.706	8
0.748	2
0.790	0.5

a) Determine the compression index, C_c

b) Calculate the primary consolidation settlement for the clay layer

H1
Groundwater table
H2
Void ratio = e
H3
O Sand
E Clay

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