a tutorial question about geotechinal and foundationengineering

2. During the lecture, we have presented the Rankine Theory of Earth Pressure. Consider a wall to retain a soil mass as shown in the figure below. The stresses in an element are also shown in the figure. If the wall is allowed to move towards the soil gradually the horizontal principal stress will increase. Eventually, to a certain stage the soil will fail and the state of stress can be represented by a Mohr circle at failure. a. Based on the above discussion, derive the expression for the Rankine passive lateral pressure. Wall moved inward 1 Į I Į I Į I Į I Į I Į I Į I Į I Į I Į I Į 4 OZI не TIT Passive condition b. The soil in the above figure has an angle of internal friction o of 25° with c' =0 and a unit weight y of 18.8 kN/m². If the height of the soil, H, is 7 m, using the Rankine passive pressure coefficient determine the lateral force applied on to the wall. Illustrate the position of the force from the base.