A Dry sand; e = 0.55 G, = 2.66 3 m B Water table 15 m Sand G, = 2.66 e = 0.48 5 m Clay w = 34.78% G, = 2.74 D Rock Figure P2.12 2.13 For a normally consolidated clay layer, given: Thickness 3.7 m Void ratio 0.82 Liquid limit - 42 Average effective stress on the clay layer = 110 kN/m? How much consolidation settlement would the clay undergo if the average effective stress on the clay layer is increased to 155 kN/m2 as the result of the construction of a foundation?

A Dry sand; e = 0.55 G, = 2.66 3 m B Water table 15 m Sand G, = 2.66 e = 0.48 5 m Clay w = 34.78% G, = 2.74 D Rock Figure P2.12 2.13 For a normally consolidated clay layer, given: Thickness 3.7 m Void ratio 0.82 Liquid limit - 42 Average effective stress on the clay layer = 110 kN/m? How much consolidation settlement would the clay undergo if the average effective stress on the clay layer is increased to 155 kN/m2 as the result of the construction of a foundation?

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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A normally consolidated clay layer, 3m thick has the ff. properties. Initial void ratio, e_0 = 0.8 compassion index, cc = 0.25 average effective pressure, P_0 = 125 kPa = o_0 Expected pressure increase, delta p or delta o = 45 kPa Secondary compression index, Ca = 0.02 Time of completion of primary settlement =1.5 years What is the total settlement of the clay layer five years after the completion of the primary consolidation settlement?
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The results of a consolidated undrained test, in which o3 = 392 kN/m?, on a normally consolidated clay are given as: Axial strain (%) Ao(kN/m²) ug(kN/m²) 0.5 0.75 156 196 226 235 250 245 240 235 99 120 132 147 161 170 173 175 1.3 2 3 4 4.5 Draw the K; line in a P' versus q' diagram. Also draw the s tress path for this test in the diagram.
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2: For the soil profile shown in figure below, determine total and effective vertical stresses and pore water pressure at points A, B, C, and D. 2m 3m 1m E'E 1m 3m د اما ما B Gs=2.7 D Gs=2.66 e=0.72 w=9% - sand —— silt e=0.66 S=60% S-100% S=100% clay Gs=2.72 e=0.6 2-
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