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Q1/ (a) The soil profile at a building site consists of dense sand up to 2m depth, normally loaded soft clay from 2 m to 6 m depth, and stiff impervious rock below 6 m depth. The ground-water table is at 0.40 m depth below ground level. The sand has a density of 18.5 kN/m³ above water table and 19 kN/m³ below it. For the clay, saturated density is 171 kN/m³ and void ratio 1.325. Calculate the probable ultimate settlement resulting from a uniformly distributed surface load of 40 kN/m2 applied over an extensive area of the site. (b) In a laboratory consolidation test with porous discs on either side of the soil sample, the 25 mm thick sample took 81 minutes for 90% primary compression. Calculate the value of coefficient of consolidation for the sample. c) What is time needed for 60% consolidation in (a) 0 -0.4m --- 2m 2m 4m:4m 6m 2m 0.4m Sand Clay 4 Um surface pressure Y= 18.5 kN/m Yar=19 kN/m² Y=9 kN/m² w = 50% W₂ = 65% G=2,65% Scanned by TapScanner Ground surface GWT Stiff imperviou Scanned by TapScanner

Q1/ (a) The soil profile at a building site consists of dense sand up to 2m depth, normally loaded soft clay from 2 m to 6 m depth, and stiff impervious rock below 6 m depth. The ground-water table is at 0.40 m depth below ground level. The sand has a density of 18.5 kN/m³ above water table and 19 kN/m³ below it. For the clay, saturated density is 171 kN/m³ and void ratio 1.325. Calculate the probable ultimate settlement resulting from a uniformly distributed surface load of 40 kN/m2 applied over an extensive area of the site. (b) In a laboratory consolidation test with porous discs on either side of the soil sample, the 25 mm thick sample took 81 minutes for 90% primary compression. Calculate the value of coefficient of consolidation for the sample. c) What is time needed for 60% consolidation in (a) 0 -0.4m --- 2m 2m 4m:4m 6m 2m 0.4m Sand Clay 4 Um surface pressure Y= 18.5 kN/m Yar=19 kN/m² Y=9 kN/m² w = 50% W₂ = 65% G=2,65% Scanned by TapScanner Ground surface GWT Stiff imperviou Scanned by TapScanner

Structural Analysis
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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Q1/ (a) The soil profile at a building site consists of dense sand up to 2m depth, normally loaded soft clay from 2 m to 6 m depth, and stiff impervious rock below 6 m depth. The ground-water table is at 0.40 m depth below ground level. The sand has a density of 18.5 kN/m³ above water table and 19 kN/m³ below it. For the clay, saturated density is 17/1 kN/m³ and void ratio 1.325. Calculate the probable ultimate settlement resulting from a uniformly distributed surface load of 40 kN/m2 applied over an extensive area of the site. (b) In a laboratory consolidation test with porous discs on either side of the soil sample, the 25 mm thick sample took 81 minutes for 90% primary compression. Calculate the value of coefficient of consolidation for the sample. c) What is time needed for 60% consolidation in (a) 0 -0.4 m --- 2m 2m -4m:4m 6m 2m 0.4m Sand Clay 4 Um surface pressure Y= 18.5 kN/m Yat=19 kN/m² Y=9 kN/m² w = 50% W₂ = 65% G=2.65% Scanned by TapScanner Ground surface GWT Stiff imperviou Scanned by TapScanner
Transcribed Image Text:Q1/ (a) The soil profile at a building site consists of dense sand up to 2m depth, normally loaded soft clay from 2 m to 6 m depth, and stiff impervious rock below 6 m depth. The ground-water table is at 0.40 m depth below ground level. The sand has a density of 18.5 kN/m³ above water table and 19 kN/m³ below it. For the clay, saturated density is 17/1 kN/m³ and void ratio 1.325. Calculate the probable ultimate settlement resulting from a uniformly distributed surface load of 40 kN/m2 applied over an extensive area of the site. (b) In a laboratory consolidation test with porous discs on either side of the soil sample, the 25 mm thick sample took 81 minutes for 90% primary compression. Calculate the value of coefficient of consolidation for the sample. c) What is time needed for 60% consolidation in (a) 0 -0.4 m --- 2m 2m -4m:4m 6m 2m 0.4m Sand Clay 4 Um surface pressure Y= 18.5 kN/m Yat=19 kN/m² Y=9 kN/m² w = 50% W₂ = 65% G=2.65% Scanned by TapScanner Ground surface GWT Stiff imperviou Scanned by TapScanner
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