Determine the consolidation settlement for the foundation shown in the figure below. The so profile is also described in the same figure. For calculation purposes assume that Cc = 0.007 (LI 10). Assume that clay 1 and 2 are normally consolidated soils. Also, comment on th acceptability of the obtained settlement. Applied load = 400 kPa Area of foundation = 7m x 10 m Sand; y dry = 17 kN/m³ Clay1; y sat = 18 kN/m³; LL = 40%; W.C = 22 %; G.S= 2.65 Clay2; y sat = 19 kN/m³; LL = 50%; W.C= 29 %; G.S=2.70 Rock *0*0*0*0*

Determine the consolidation settlement for the foundation shown in the figure below. The so profile is also described in the same figure. For calculation purposes assume that Cc = 0.007 (LI 10). Assume that clay 1 and 2 are normally consolidated soils. Also, comment on th acceptability of the obtained settlement. Applied load = 400 kPa Area of foundation = 7m x 10 m Sand; y dry = 17 kN/m³ Clay1; y sat = 18 kN/m³; LL = 40%; W.C = 22 %; G.S= 2.65 Clay2; y sat = 19 kN/m³; LL = 50%; W.C= 29 %; G.S=2.70 Rock 00*00

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter8: Mat Foundations

Section: Chapter Questions

Problem 8.7P

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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
2) A rectangular (5ft by 8ft) foundation will be built on the soil profile shown in the figure. Calculate the primary consolidation settlement below the center of the foundation. Assume the clay layer shown in the figure is normally consolidated. For simplicity, do not subdivide the clay into multiple sublayers. AG = 1500 lb/ft? Dry sand *120 pet Clay,Ce =0.28 e,= 0.55 Ya 125 pct Bedrock (Impermeable)
KINDLY OBTAIN THE RIGHT ANSWER AND EXPLAIN Refer to Figure. Given that B =1 m, L = 3 m, and Q = 110 kN, the soil characteristics given in the figure are Cs = 1/5 Cc, Ꝺ’c= 40 kN/m2. Field monitoring indicated that the foundation settlement was 19 mm during the first 12 months. Estimate the average stress increase in the clay layer due to the applied load. Estimate the primary consolidation settlement. What is the degree of consolidation after 12 months? Estimate the coefficient of consolidation for the pressure range. Estimate the settlement in 24 months.
Calculate the primary consolidation settlement of the 3-m thick clay layer, shown in the figure, that will result from the load carried by a 1.5 m square footing. The clay is normally consolidated. Use 2:1 method for calculation of Δσ.
KINDLY GET THE REAL ANSWER WITH EXPLAIN STEP Given that B =1 m, L = 3 m, and Q = 110 kN, the soil characteristics given in the figure are Cs = 1/5 Cc, Ꝺ’c= 40 kN/m2. Field monitoring indicated that the foundation settlement was 19 mm during the first 12 months. Estimate the average stress increase in the clay layer due to the applied load. Estimate the primary consolidation settlement. What is the degree of consolidation after 12 months? Estimate the coefficient of consolidation for the pressure range. Estimate the settlement in 24 months.
The soil is acted upon by a uniformly distributed load P=60 kPa at the ground surface. Compute the settlement of the clay layer,in mm, caused by a primary consolidation if the preconsolidation pressure of clay is 200 kPa, if the preconsolidation pressure of clay is 230 kPa, and if the clay is normally consolidated. Use Cs=Cc/5. Round off to the nearest whole number.
|!;9 ELABORATE Try solving the following problem: Practice Problem: The following are the results of a consolidation test on a sample soil: a. Plot the e-log o' curve b. Using Casagrande's method, determine the preconsolidation pressure. c. Calculate the compression index, Cc e 1.1 1.085 1.055 1.01 0.94 0.79 0.63 Pressure, o' (ton /ft²) 0.25 0.50 1.00 2.00 4.00 8.00 16.00
Calculate the primary consolidation settlement of the 3 m thick clay layer (Figure below) that will result from the load carried by a 1.5 m square footing. The clay is normally consolidated. Dry sand Ydry = 15.7 kN/m³ 3 m 1.5 m 3m 1.5 m, 890 KN Footing size 1.5 mx 1.5 m Groundwater table Ysat = 18.9 kN/m³ Clay Ysat = 17.3 kN/m³ Co=1.0 LL=40
A foundation with dimensions BxL supporting a column load, P. The foundation rests on a sandy soil underlain by a clay layer (consolidation test result in Problem 2). • Estimate the primary consolidation settlement of the clay due to the foundation load. • What is the void ratio at the end of primary consolidation? • Calculate the secondary Consolidation settlement after 6 years knowing that the primary consolidation settlement took 2.5 years. Given: P = 350 kN, B =L=2.5 m, Df= 2 m, H1= 3 m, and H2=4.5 m. The soil properties are as follows: Sand: ya = 16.4 kN/m³; ysat = 18.8 kN/m³ Clay: Ysat = 17.6 kN/m²; eo = 0.82, Ca=0.02 Sand D Yd H GWT BxL Ysat Clay Ysat Sandy gravel
Prob- The various approximations approaches described in this section can be used to compare K_a for both a normally consolidated (nc) clay and a clay with a known value of OCR = 5.0.
1. A soil profile is shown in the figure.A uniformly distribute d load of 50 Kpa is applied at the ground surface. Assume Cs= 1/5 Cc. What is the settlement of the clay layercaused by primary consolidation if: a. The clay is normally consolidate d b. The preconsolidation pre ssure, de= 210 Kpa c. The preconsolidation pressure, o.= 150 Kpa Ap = 50 kPa Sand 3 m Yay = 16 kN/m? Ground water table 6 m Sand Ya = 18.5 kN/m Clay Yar = 19 kN/m e = 0.95 LL = 50 8 m Sand Figure 06.4
Select the most appropriate option: For a purely cohesive soil, select the correct answer regarding the earth pressure coefficients; explain your choice. a. Ka > Kpb. Ka < Kpc. Ka = Kp