Evaluate the plastic settlement, in meter(s) on a layer of plastic clay due to an increase of pressure caused by loads above it under the ff. conditions: Initial intergranular pressure (ơ') = 200 kPa Increase in intergranular pressure (delta o) = 150 kPa Thickness of the clay layer = 10m Coefficient of consolidation (Cc) = %3D %3D 0.315 Void ratio of the clay (e) = 1.5 %3D

Evaluate the plastic settlement, in meter(s) on a layer of plastic clay due to an increase of pressure caused by loads above it under the ff. conditions: Initial intergranular pressure (ơ') = 200 kPa Increase in intergranular pressure (delta o) = 150 kPa Thickness of the clay layer = 10m Coefficient of consolidation (Cc) = %3D %3D 0.315 Void ratio of the clay (e) = 1.5 %3D

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 sand has Gs = 2.66. Calculate the hydraulic gradient that will cause boiling for e = 0.35, 0.45, 0.55, 0.7, and 0.8.
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.)
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 stratum of normally consolidated clay of thickness 10 ft is drained on one side only. It has a hydraulic conductivity of h = 1.863 x 10^-8 in/sec and a coefficient of volume compressibility mv = 8.6 x 10^-4 in2/lb. Determine the time required for 20% consolidation by assuming a uniformly distributed load of 5250 lb/ft2. a.8.72 days b.157.50 days c.6.982 days d.125.64 days
A normally consolidated clay layer, 4m thick, has the following properties:Initial void ration, eo = 0.65Compression Index, Cc = 0.20Average effective pressure, σ’o = 100 kPaExpected pressure increase due to loading on ground surface = 30 kPaSecondary compression index, Cα = 0.02Time for completion of primary settlement = 1.5 yearsWhat is the total settlement of the clay layer five years after the completion of primary consolidation settlement?
Use unit weight of water = 10kN/m3 in the following questions. A soil profile is shown in Figure Q2(c). If a uniform distributed load of 50 kN/m2 is applied at the ground surface, compute the average settlement of the clay layer caused by primary consolidation if; i)Determine the existing overburden effective stress at mid of clay layer ii) Settlement in clay if, the clay is normally consolidated, given Cc = 0.0085(LL-10) iii) Settlement in clay if, the preconsolidation pressure, pc’=200 kN/m2, given Cr=1/5Cc. Use Cc obtained in part (ii).
Under normal loading condition, a 3.6-m thick clay (normally consolidated) has po = 190 kPa and eo = 1.22. A surcharge of 190 kPa reduces its void ratio to 0.91. The hydraulic conductivity of the clay for the loading range is 6.1 x 10-5 m/day. a. What is the coefficient of volume compressibility of the clay? b. What is the coefficient of consolidation of the clay? c. How long will it take for this clay layer to reach 60% consolidation if it is drained on one side only? Please answer this asap. For upvote. Thank you very much
For a normally consolidated insensitive clay 0_CD= 30°. Deviator stress at failure of the same soil is 250 kN/m2 in CU test. If Skempton's A-parameter at failure is 0.62, find out the confining pressure during the consolidation state. a 280 b. 260 c. 270 d. 250
For a normally consolidated insensitive clay ∅_CD = 30°. Deviator stress at failure of the same soil is 250 kN/m2 in CU test. If Skempton’s A-parameter at failure is 0.62, find out the confining pressure during the consolidation state. Show free body diagram a.260 b.250 c.270 d.280
A 3 meter thick fill was placed over a 9 meter thick compressible clay. Underlying the clay layer is a very hard impermeable clay. The groundwater table is located on top of the compressible clay. A circular tank 9 meters in diameter transfers a surface contact stress of 45 kPa. Assume for this problem that the settlement of the fill and the very hard clay is small compared to the settlement of the compressible clay. a) Calculate the initial void ratio and saturated density of the compressible clay. b) Divide the compressible layer into two sublayers of equal thickness. The preconsolidation pressure is 100 kPa for the upper sublayer and 160 kPa for the lower sublayer. Calculate the following at the center of each sublayer: the increase in vertical stress caused by the tank underneath its center, and the consolidation setttlement due to the combined effect of the tank and weight of fill. c) How long will it take for 0.18 meters of settlement to occur? d) After 3.6 years, what…
A soft to very soft silty clay layer 3 m thick exists between a layer of permeable clayey silty sand at top and a nearlyimpermeable layer of stiff silty clay at bottom. Oedometer tests were carried out on a sample of the soft clay 19mmthick. From the plot of ΔH versus log time, the value of time t100 (the time at 100% primary consolidation) was100 min. From the graph of e versus log σ' the compression index Cc was 0.32 and the void ratio ep at the end of theprimary consolidation was 0.72. Estimate the secondary compression of the silty clay layer that would occur fromtime of completion of the primary consolidation to 30 years of the load application in the field.
Example 9.2: A clay soil, tested in a consolidometer, showed a decrease in void res •m 1.20 to 1.10 when the presure was increased from 0.25 to 0.50 kgflem?. Calculate to. efficient of compressibility (a) and the coefficient of volume compressibility (m). If t •ficient of consolidation (c,) determined in the test for the given stress increment u m?/year, calculate the coefficient of permeability in cm/s. If the sample tested at the site was taken from a clay layer 3.0 m in thickness, determin consolidation settlement resulting from the given stress increment. lution: