Following results were recorded from a consolidation test on a specimen of saturated clay, each load being maintained constant for 24 hours before the addition of the next increment. Applied stress (kN/m²) Sample thickness (mm) 0 19.70 50 100 200 19.30 19.15 18.85 The water content of the sample at the end of the test was 28 per cent and the specific gravity of the soil particles was 2.72.0 00% - 400 800 0 18.56 18.36 18.90 (a) Calculate the void ratio at the end of each stress range and plot the e- o curve. Compute the coefficient of volume compressibility, m, for an effective stress range of 150-350 kN/m² from the e- o curve. (b) Plot the e log o curve and determine the compression index, C and preconsolidation stress, (Casagrande method). (c) Plot the m curve. (d) Determine the consolidation settlement that may be expected in a 4 m thick layer of this clay for a stress increase from 150 to 350 kN/m², using data from (a), (b) and (c).

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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‹ample 9.1: Following results were recorded from a consolidation test on a specime turated clay, each load being maintained constant for 24 hours before the addition o ext increment.
Following results were recorded from a consolidation test on a specimen
of saturated clay, each load being maintained constant for 24 hours before the addition of
the next increment.
Applied stress (kN/m²)
Sample thickness (mm)
0
50
100 200
19.70 19.30 19.15 18.85
400 800
18.56 18.36
The water content of the sample at the end of the test was 28 per cent and the specific
gravity of the soil particles was 2.72.
004
008
-
0
18.90
(a) Calculate the void ratio at the end of each stress range and plot the e- o curve.
Compute the coefficient of volume compressibility, m, for an effective stress range of
150-350 kN/m² from the e-
curve.
(b) Plot the e log curve and determine the compression index, C and
preconsolidation stress, 5 (Casagrande method).
(c) Plot the m, - o curve.
(d) Determine the consolidation settlement that may be expected in a 4 m thick layer
of this clay for a stress increase from 150 to 350 kN/m², using data from (a), (b) and (c).
Transcribed Image Text:Following results were recorded from a consolidation test on a specimen of saturated clay, each load being maintained constant for 24 hours before the addition of the next increment. Applied stress (kN/m²) Sample thickness (mm) 0 50 100 200 19.70 19.30 19.15 18.85 400 800 18.56 18.36 The water content of the sample at the end of the test was 28 per cent and the specific gravity of the soil particles was 2.72. 004 008 - 0 18.90 (a) Calculate the void ratio at the end of each stress range and plot the e- o curve. Compute the coefficient of volume compressibility, m, for an effective stress range of 150-350 kN/m² from the e- curve. (b) Plot the e log curve and determine the compression index, C and preconsolidation stress, 5 (Casagrande method). (c) Plot the m, - o curve. (d) Determine the consolidation settlement that may be expected in a 4 m thick layer of this clay for a stress increase from 150 to 350 kN/m², using data from (a), (b) and (c).
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