The soil is acted upon by a uniformly distributed load of 60 kPa at the ground surface.60 kPaYary = 16.5 kN/m^34 mSandGWTSand8 mY= 18.0 kN/m^3Yeat =20.0 kN/m^36 mClaye=0.85LL = 48%1. Compute the settlement of the clay layer caused by primary consolidation if the soil is normally consolidated.[ Select ]2. Compute the settlement of the clay layer caused by primary consolidation if the preconsolidation pressure of clay is 230 kPa. Use Cs = Cc/5.[Select ]3. Compute the settlement of the clay layer caused by primary consolidation if the preconsolidation pressure of clay is 200 kPa. Use Cs = Cc/5.[ Select ]

To Find :- 1. Consolidation settlement when clay is normally consolidated. 2. Preconsolidation…

Answered: The soil is acted upon by a uniformly…

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

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A normally consolidated clay has the following values. Void ratio, e k (cm/sec) 1.5 0.2 x 10-6 0.91 x 10-6 Estimate the magnitude k of the clay at a void ratio (e) of 0.9. Use 1.9 en k = C, 1+e (Enter your answer to three significant figures.) k cm/sec
A normally consolidated clay has the following values void ratio e = 1.2, k(cm/sec) = 0.2 x 10^-6 And void ratio e = 1.9, 0.91x10^-6. Estimate the magnitude k of the clay at a void ratio (e) of 0.9. Use k = C (e^n)/1+e.
The following data are given for normally consolidated clay: Thickness=2.6m Primary Cc=0.3 Secondary Cc=0.02 e=0.8 Average Pressure=127 kPa Change in pressure (vertical) =46 kPa Determine the following 1. Primary Consolidation Settlement (Ans. 58.17mm) 2. Secondary Settlement five years after the completion of the primary settlement. The time for completion of primary settlement is 1.5 years. (Ans. 15.4mm)
2.9 A normally consolidated clay has the following values. Void ratio, e k (cm/sec) 0.2 × 10 0.91 x 10-6 1.2 1.9 Estimate the magnitude of k of the clay at a void ratio (e) of 0,9. Use Eq. (2,41).
A normally consolidated clay layer of 4 m in thikness has overburden stress of 96.7 kPa and final effective stress of 154.3 kPa. If Cr = 0.22 and void ratio = 1.1 the consolidation settlement would be: %3D O A. 173.0 mm O B. 178.3 mm O C. 172.3 mm O D. 175.3 mm QUESTION 12 The liquid and plastic limits of a clay are 48% and 23% respectively. The specific gravity is 2.7. Estimate the following: - Cc - Cr Then select the correct answers. O A. Cc = 0.33 Cr = 0.66 O B. Cc = 0.34 Cr = 0.06 O C. Cc = 0.30 Cr = 0.16 O D. Cc = 0.06 Cr = 0.34
For a normally consolidated soil, the following is given: Determine the following: a. The compression index, Cc. b. The void ratio corresponding to pressure of 200 kN/m2
Problem 3: A layered soil is shown below. Given: H1 = 1.5 m kj = 9 x 104 cm/sec H2 = 2.5 m k2 = 7.8 x 10³ cm/sec H3 = 3.5 m k3 = 4.5 x 10$ cm/sec %3D Estimate the ratio of equivalent permeability, kH(eqykv(cq). H1 H2 k2 H3
4. In a consolidated-drained triaxial test on a clay that is normally consolidated, the results are as follows: O3 = 15 lb/in 2 (Aoa)f = 11 lb/in? (Aua)f = 7.2 lb/in? a) Determine the consolidated-undrained friction angle. %3D b) Calculate the drained friction angle.
Find the C, and the "apparent" OCR for a superficial clay stratum that is 4m thick. The water is at the surface. A sample of the clay has a water content of 27.9%, and a specific gravity of 2.65. An oedometer test showed the following results: Voids Ratio 0.736 0.733 0.73 0.675 0.638 0.6 Vertical Effective Stress 15 28 60 230 480 930
Q5: Figure below shows a soil profile. The uniformly distributed load on the ground surface is Ao. Estimate the primary consolidation settlement of the clay layer given these values: HI = 1.5 m, H2 = 2 m, H3 = 2.5 m Sand: e = 0.62, Gs 2.62 Clay: e = 0.98, Gs = 2.75, LL = 50 Ao = 110 kN/m2 Sand Groundwater table Sand Clay Void ratio =e Hy Normally consolidated Sand
11.12 A 2-m clay layer in the field has a current effective stress, oó= 70 kN/m?. There is a net stress increase, Ao = 180 kN/m², due to a foundation load. Calculate the expected primary consolidation settlement. The results of a consolidation test on the clay are given below. o' (kN/m) 0.98 12 0.94 50 0.82 200 0.73 400 ©Cngage lamng 2014
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) = 0.315 Void ratio of the clay (e) = 1.5 %3D %3D %3D

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