oil borings made at a site in city indicate that the top 6 m is a loose sand and miscellaneous fill, with the groundwater table at 3 m below the ground surface. Below this is a fairly soft blue-gray silty-clay with an average water content of 30 %. The boring was terminated at 16 m below the ground surface when fairly stiff silty clay was encountered. Make reasonable

oil borings made at a site in city indicate that the top 6 m is a loose sand and miscellaneous fill, with the groundwater table at 3 m below the ground surface. Below this is a fairly soft blue-gray silty-clay with an average water content of 30 %. The boring was terminated at 16 m below the ground surface when fairly stiff silty clay was encountered. Make reasonable

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.10P: The soil profile at a site consists of 10 m of gravelly sand underlain by a soft clay layer. The...

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Estimate the ultimate consolidation settlement under the centerline of a 25 x 25 meter mat foundation. The mat is 1.5 meter thick reinforced concrete (ϒconcrete = 23.6 kN / m3), and the average stress on the surface of the slab is 125 kPa. The soil profile is shown in the figure below. Lab testing on samples of the clay showed that the clay is normally consolidated and that Cc = 0.40, Cr = 0.03, and eo = 1.13. Neglect any settlements due to the sand layer. Divide the clay layer into four thinner layers of thickness 2.0, 2.0, 3.0, and 3.0 meters.
Assume a consolidated drained triaxial compression test is to be performed on a medium stiff clay sampleextracted from 100 ft below surface and consolidated to its in-situ effective stress state.Assume the GWT is 20 ftbelow ground surface level. Assume the moist unit weight above the GWT is 100 pc and the saturated unitweight below the GWT is 130 pc. Assume the Ko for the clay is 0.7. Assume that the effective cohesion is zeroand the angle of internal friction is 35 degrees. Estimate the following: (a) deviator stress at failure: (b) shearstrength (on the failure plane). (c) angle of failure of the shear plane
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.
Note : This is not an assignment question. Discuss the significance of knowing the vertical stress increase in soil due to various types of loadings.
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.
1. The time for 75% consolidation of a 25-mm clay specimen (drained at top and bottom) in thelaboratory is 22 minutes. How long will it take for a 6-m thick clay layer in the field to undergo55% consolidation under the same pressure increment? In the field, there is a rock layer at thebottom of the clay 2. A foundation 6.1 by 12.2m (20 by 40 ft) in plan is to be constructed at a site where thegeological profile is as shown in Fig. 17.17. The foundation load is 287 kPa (3 tons/ft2) and theunit weights of various soils are as shown in the diagram. Consolidation tests of thecompressible clay indicate that it has a void ratio of 1.680 at 95.8 kPa (1 ton/ft2) and acompression index of 0.69. The coefficient of consolidation is 8.3x10-4 cm2/s. Calculate the totalsettlement, and plot the rate of settlement at the center of the foundation, in millimeters(inches) versus years. 3.
A DMT was performed in a normally consolidated clay at a depth of 10 m, giving a KD of 2.1.The clay has a unit weight of 118 lb/ft3 , and the groundwater table is at the ground surface. Estimate the undrained shear strength of the clay at a depth of 10 m.
A consolidated-undrained test on a normally consolidate clay yield the following results: Confining Pressure = 151 KPa; Deviator Stress = 187 KPa; Pore Pressure = 71 KPa. Calculate the consolidated undrained friction angle. Please answer this asap. For upvote. Thank you very much
A soil excavation was done until 4m below the surface of the soil. It was identified that the shallow ground water level is 2m below the ground level and the upper is dry. The properties of the soil are: Gs = 2.7, e = 0.50, and ϕ’ = 30degrees. Assuming no seepage. What is the value of the in-situ soil’s unit weight above G.W.T. in kN/m3? What is the maximum neutral stress at the deepest point of excavation in kPa? What is the value of the total stress of soil at the surface of the ground water table in kPa? What is the value of the effective stress at the deepest point of excavation in kPa?
Estimate the ultimate consolidation settlement under the centerline of a 15 X 15 m mat foundation. The mat is 1 m thick reinforced concrete and the average stress on the surface of the slab is 75 kPa. The soil profile is shown below. Oedometer tests on samples of the clay provide these average values. ’p = 130 kPa, Cc = 0.40, Cr = Cs = 0.03 Neglect any settlements due to the sand layer. Please and thank you!! :)
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.
A square foundation, 2.5x2.5m in size, supports a column load of 478 kN. The soil characteristics are given in the following figure. Field monitoring indicated that the foundation settlement was 46mm at the end of 2 years. (a) Estimate the average stress increase in the clay layer due to the applied load. (b) Estimate the primary consolidation settlement. (c) What is the degree of consolidation after 2 years? (d) Estimate the coefficient of consolidation for the pressure range. (e) Estimate the settlement in 3 years.