A circular area having a radius of 3 m carries a uniformly distributed of 90 kPa is applied to the ground. Compute the total vertical stress in kN/m^2 increment due to this uniform load if the unit weight of soil is 18.40 kN/m^3 at point 6 m below the center of the circular area. a. 27.26 b. 137.66 c. 129.02 d. 135.17

H.Q 5 Figure below shows an embankment load on a silty clay soil layer. Determine the stress increase at points A, B, and C that are located at a depth of 5 m below the ground surface. + 6m Center line IV:2H IV:2H 10m y =17 KN/m II

An embankment load on a silty clay soil layer as shown below. Determine the stress increase under the embankment at points A and B that are loaded at a depth of 6 m below the ground surface, please use figure (10.20). 5 m 1Н:2V, 1H:2V 1H:1V 8 m y=18 kN/m y=18 kN/m" 6 m : B Figure 10.19 Embankment loading 0.50- 3.0 20 16 0.45- 14 1.2 LO 0.40 - 0.9 0.8 0.7 0.35 - 0.6 030- 05 04 * 025 - 03 0.20 - 0.2 0.15 - 0.10 - 0.1 0.05- Figure 10.20 Osterberg's chart for determination of vertical stress 0.00 TI TT - due to embank- 01 0.1 10 ment loading 100 327

Consider the soil profile depicted in the figure below. The water table is located 3 m below the ground surface. Calculate the vertical effective stress at Point A in kPa (acceptable tolerance = 2%).

Plot the distribution of total stress, effective stress, and porewater pressure with depth for the soil profile shown in Figure 1. Neglect capillary action and pore air pressure.

G,+S,e , a) Starting from the basic phase definitions (see the Appendix) show that y = 1+e b) Using the expression above, determine the distribution of the total and effective vertical stress with depth for the soil profile shown. Plot these distributions for 0 60%, T, : 1.781 – 0.933 log(100 – U%) C,H - log 1+e, o, + Ao' C,H 1+e, S = - log

A granular soil is subjected to a minor principal stress of 200 kN/m2. If the angle of internal friction is 30°, determine the inclination of the plane of failure with respect to the direction of the major principal stress. Show free body diagram. a.30 b.45 c.60 d.37.5

26. A soil element is shown in Fig 25. Determine the following: a. Maximum and minimum principal stresses b. Normal and shear stresses on the plane AB 100 kN/m2 45 kN/m? 30° 45 kN/m? 60 kN/m² Fig 26- Prob 26