The answers are given, i just do not know how to get there. 9.9. A 2 m wide square foundation is placed at a depth of 1.5 m, in a very thick homogeneous sanddeposit where qe 10 MN/m² and y = 18.5 kN/m³. The stress level at the foundation is 140 kN/m².Estimate the settlement in 25 years, using the method of Schmertmann et al. [Eq. (9.30)]. Howmuch of this settlement is due to creep?AnswerSe=8.0 mmSettlement due to creep= 2.6 mm

Answered: 9.9. A 2 m wide square foundation is…

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Settlement Of Shallow Foundations

Section: Chapter Questions

Problem 9.9P

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A 2 m wide square foundation is placed at a depth of 1.5 m, in a very thick homogeneous sand deposit where q. 10 MN/m? and y = 18.5 kN/m³. The stress level at the foun- dation is 140 kN/m². Estimate the settlement in 25 years, using the method of Schmertmann et al. [Eq. (9.30)]. How much of this settlement is due to creep? 9.9
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.
Q-3: A consolidated-drained tri-axial test was conducted on a normally consolidated clay. The results are as follows: 03 = 276 kN/m² (Aod)f=276 kN/m² Determine a. Angle of friction, o' b. Angle that the failure plane makes with the major principal plane c. Find the normal stress o' and the shear stress ty on the failure plane d. Determine the effective normal stress on the plane of maximum shear stress Shear stress Š σí σí σ3 Effective stress failure envelope B σ3 = 276 kN/m² A Normal stress 20 σ = 552 kN/m² Ⓒ Cengage Learning 2014
Estimate the increase in vertical stress at 0.5 m depth intervals, within the clay layer, below point A (See figure below). The foundation exerts a uniform vertical stress of 120 kPa at ground level. Using these values estimate the settlement due to the clay layer. (Hand in any graphs used) 5m 5m 2m 3m Very Dense Sand 2m 1.5m Clay E=3.5 MPa 2m Bedrock Soil profile A Plan of building 3m Soil profile and plan for Question 4 3m FA
2. Major and minor total principal stresses acting on a soil element are 348kPa and 160kPa respectively. And the pore water pressure (u) at this element is 96kPa. From previous laboratory tests you know that this soil has c'=12kPa and '-32°. Draw the effective stress failure envelope. total stress Mohr's circle, effective stress Mohr's circle and determine if a shear failure will occur for that soil element under the given stress conditions.
2.An oil storage tank 35 m in diameter is located 2 m below the surface of a deposit of clay 32 m thick, the water table being at the surface: the net foundation pressure is 105 kN/m2. A firm stratum underlies the clay. The average value of mv for the clay is 0.14 m^2/MN and that of pore pressure coefficient A is 0.65. The undrained value of Young’s modulus is estimated to be 40 MN/m^2 Determine the total settlement under the centre of the tank.
A plan of a foundation 1 m x 2 m is shown in Figure 4-2. a. Estimate the consolidation settlement of the foundation. b. Refer to part a. Given for the clay layer: Ca=0.02. Estimate the total consolidation settlement eight years after the completion of the primary consolidation settlement. (Note: Time for completion of primary consolidation settlement is 1.5 years). 15m 0.5 m 9=170 kN/m²(net stress increase) BXL 1m x 2m Sand Y = 16.5 kN/m Groundwater table Sand 25m Figure 4-2 = You 17.5 kN/m³ Normally consolidated clay y = 16 kN/m³ ea 0.78 E = 6,000 kN/m² C, = 0.32 C₁ = 0.09 A. = 0.5
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(b) Figure Q2 (b) shows the ring foundation to support a silo. Given R1 = 3 m while R2 =6 m. The total vertical load is 7500 kN. (i) Calculate and plot the vertical stress increase with depth up to 7 m (use 1 minterval) under the centre of the ring (point O).(ii) Determine the maximum vertical stress increase and its location.
answer should be on the choices
The initial principal stresses at acertain depth in a clay soil are 200 kPa on the horizontal plane and 100 kPa on the vertical plane.Construction of a surface foundation induces additional stresses consisting of a vertical stress of 45 kPa, a lateral stress of 20 kPa, and a clockwise(with respect to the horizontal plane) shear stress of 40 kPa. Determine the change in shearing stress in kPa.
indicate the final answer in 3 decimal places.

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