4. Clay layer A with single drainage and cocfficient of consolidation Cv taikes 6 months to achieve 50% consolidation. The time taken by clay layer B of the aume thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is A. 3 months B. 6 months C. 12 months D. 24months 5. Normally consolidated clay settled 10 mm when effective stress was increased fvom 100 kN/m2 to 200 kN/m'. If the effective stress is further increased fiom 200 kN/m to 400 kN/m2, then the settlement of the same clay is A. 10 mm B. 20 mm C. 30 mm D. 40 mm

4. Clay layer A with single drainage and cocfficient of consolidation Cv taikes 6 months to achieve 50% consolidation. The time taken by clay layer B of the aume thickness with double drainage and coefficient of consolidation Cv/2 to achieve the same degree of consolidation is A. 3 months B. 6 months C. 12 months D. 24months 5. Normally consolidated clay settled 10 mm when effective stress was increased fvom 100 kN/m2 to 200 kN/m'. If the effective stress is further increased fiom 200 kN/m to 400 kN/m2, then the settlement of the same clay is A. 10 mm B. 20 mm C. 30 mm D. 40 mm

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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Similar questions

J1
A 5 m thick saturated soil stratum has a compression index of 0.25 and coefficient of permeability 3.2*10^(-3) mm/sec. If the void ratio is 1.9 at vertical stress of 0.15 N/ mm^2, compute the void ratio when the vertical stress is increased to 0.2 N/mm^2. Also calculate settlement due to above stress increase and time required for 50% consolidation?
Answer in three decimal places please
A 3m deep sand layer has a specific gravity of 2.68 and a void ratioof 0.60. Under this layer is a 2.5m deep clay profile with a specific gravity of 2.7 and a moisture content of 30%. The water table is observed at 1m below the ground surface. Determine the compression index of a normally consolidated clay after the surcharge of 75kPa. Clay is observed to have a void ratio of 0.40 after the surcharge. (Assume unit weight of soil profile above the clay layer is the same when the soil was not subjected to surcharge load).
Answer in three decimal places please
A 3 m thick stratum (drained in two directions) of saturated Clay and under overburden, exhibited 90% primary consolidation in 75 days. Find the coefficient of consolidation of the clay for the pressure range. a) Take a 30 mm thick specimen, how long will it take for it to show 80% consolidation in the laboratory for a similar length of pressure, consider a two-way drain? b) If the specimen is 25 mm, time to reach 60% consolidation, with drainage in one direction?
Q-
13. Situation 13 - The soil is acted upon by a uniformly distributed load ΔP = 60 kPa at the ground surface. a. Compute the settlement of the clay layer, in mm, caused by primary consolidation if the preconsolidation pressure of clay is 230 kPa. Use Cs = Cc/5. Round off to the nearest whole number. b. Compute the settlement of the clay layer, in mm, caused by primary consolidation if the clay is normally consolidated. Round off to the nearest whole number. c. Compute the settlement of the clay layer, in mm, caused by primary consolidation if the preconsolidation pressure of clay is 200 kPa. Use Cs = Cc/5. Round off to the nearest whole number.