9. A 4.5 m saturated clay layer (two-way drainage) subjected to surcharge loading underwent 90% primary consolidation in 180 days. a) Find the coefficient of consolidation of the clay for the pressure range. b) How long will it take for a 19-mm-thick clay specimen to undergo 65% coefficient of consolidation of the clay for the pressure range. c) How long will it take for a 19-mm-thick clay specimen to undergo 65% consolidation in a laboratory test?

9. A 4.5 m saturated clay layer (two-way drainage) subjected to surcharge loading underwent 90% primary consolidation in 180 days. a) Find the coefficient of consolidation of the clay for the pressure range. b) How long will it take for a 19-mm-thick clay specimen to undergo 65% coefficient of consolidation of the clay for the pressure range. c) How long will it take for a 19-mm-thick clay specimen to undergo 65% consolidation in a laboratory test?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.17P

See similar textbooks

Similar questions

A 3-m layer (double drainage) of saturated clay under a surcharge loading underwent 90% primary consolidation in 75 days. Find the coefficient of consolidation of clay for the pressure range..
Q 8.7 If the coefficient of consolidation for the clay layer in problem 8.3 is 0.0018 cm^2/Sec, how long will it take for 60% primary consolidation to take place? What will be the total compression due to consolidation at that time?
A 3-m-thick layer (two-way drainage) of saturated clay under a surchargeloading underwent 90% primary consolidation in 75 days. Find the coefficientof consolidation of clay for the pressure range.
A 3.2 m thick layer of saturated clay under a surcharge loading underwent 90% primary consolidation in 80 days with double drainage. 1.Determine the coefficient of consolidation for the pressure range. 2.For a 10 cm thick specimen of the said clay, how long will it take to undergo 90% consolidation in the laboratory for a similar pressure range?
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?
Due to a certain loading condition, the initial excess pore water pressure distribution in a 4m thick clay layer is shown in figure p6.2. Given that Cv=0.3mm2/s, determine the degree of consolidation after 100 days of load applications.
For a normally consolidated clay layer in the field, the following values are given:Thickness of clay layer = 8.5 ftVoid ratio ?? = 0.8Compression index ?? = 0.28Average effective pressure on the clay layer ??′ = 2650 lb ft2 ⁄∆?′ = 970 lb ft2 ⁄Secondary compression index ?? = 0.02What is the total consolidation settlement of the clay layer five years after the completionof primary consolidation settlement? (Note: Time for completion of primary settlement= 1.5 years.)
A 10 ft thick clay layer of saturated clay (two-way drainage) under a loading underwent 90% primary consolidation in 400 days. The laboratory test’s specimen will have two-way drainage. Find the coefficient of consolidation of clay for the pressure range. For a 1 inch thick undisturbed clay specimen, how long will it take to undergo 80% consolidation in the laboratory for a similar pressure range?
For a given over consolidated clay: Specific gravity = 2.71 , Liquid limit = 45, In situ average effective over burden pressure = 120 kPa ,In situ void ratio = 0.80, Thickness of clay layer = 4m , ∆P = 40 kPa, Effective pressure at the mid – height of clay layer = 60 kPa , Swell index (Cs) = 1/5 Cc1.) Compute the compression index. 2.) Compute the pre – consolidation pressure. 3) Compute the primary consolidation settlement.
Laboratory tests on a 25-mm-thick clay specimen drained at the top and bot-tom show that 50% consolidation takes place in 8.5 min.a. How long will it take for a similar clay layer in the field, 3.2 m thick anddrained at the top only, to undergo 50% consolidation?b. Find the time required for the clay layer in the field described in part (a)to reach 65% consolidation.
For normally consolidated clay layer in the field, the ff. values are given: Thickness of clay layer = 8.5ft, Void Ratio = 0.8; Compression Index = 0.28; Average effective pressure on the clay layer is 2650 lb/ft2; ∆σ = 970 lb/ft2; Secondary Compression index = 0.02. What is the total consolidation settlement of the clay layer five years after the completion of primary consolidation settlement? Time for completion of primary settlement = 1.5 years)
A 3 meter thick clay layer (pore water flowing in both directions) saturated with water loaded with embankment soil underwent 90% primary consolidation within 150 days. Determine the coefficient of consolidation of the clay for a certain pressure range.