At-rest: A 17-ft-high basement wall retains a backfill with y = 95 pcf, o' = 33°, c' = 0 and OCR = 1.8. (a) Calculate the magnitude of the lateral thrust acting per unit length of wall: (b) Estimate the location of the lateral thrust measured from the bottom of the wall; and (c) Calculate the equivalent fluid pressure for this problem (Ans. 60 pcf). (Problem 13.2, Das and Sobhan 2014)

Determine the active and passive force acting on a 3 meter high wall that supports clay with an undrained shear strength of 100 kPa and a unit weight of 19.20 kN/m

A 6.0-m-high retaining wall with a vertical back retains a homogeneous saturated clay. The specific weight of saturated clay is 1.90 ton/m3. Laboratory tests indicate that the Undrained shear strength Cu of the clay is 1.71 ton/m2 a) Make the necessary calculations and draw the variation of the active Rankine pressure on the wall with respect to depth b) Find the depth at which a tension crack can occur. c) Determine the total active pressure per unit length of wall before a crack occurs. strain. Y Determine the total active pressure per unit length of wall after the crack occurs. strain d) Y SAT C = 1.71 ton/m² $ = 0° = 1.94 ton/m³ H = 6.0 m

3. Compute the resultant lateral force for the soil-wall system shown in Figure 3. You may ignore tensile cracks. Use • A- Coloumb • B - Rankine 0=30°, y=20kN/m³ 4m Ground water table 7m c=50KN/m², p=10°, y=18KN/m³ 0=25°, y=20KN/m³ 8 m Gravity wall Figure 3

The following figure shows a section of an anchored retaining wall embedded into a saturated stiff clay layer. The sand has a unit weight of = 18 kN/m³, c' = 0 kPa and o' = 34º. The clay has a unit weight of = 20 kN/m³, c₁ = 80 kPa and = 0°. A uniform pressure of 40 kPa is applied on the soil surface. The short term stability of the wall is considered in an undrained analysis. Use the Rankin's theory of lateral earth pressure to determine the active and passive horizontal stresses. You should apply the requirements of AS 4678 and the partial factors of safety method in estimation of soil pressures. Assume the soil is in-situ and use a structural classification factor of ₁ = 1. 3m 1m Water table 1.5m 40 kPa Not to Scale Sand Clay Ta

a. For the vertical wall shown (no GWT, no interface friction), determine and plot the Ko, active, and passive lateral stress distributions acting on the wall b.Suppose the groundwater table in Problem 1 rises to a depth of 4m below the surface (on both sides or the wall) and assume the wall Is under active loading conditions. Assume that soil above the groundwater table Is dry, and that Y sat = 20 kN/m° • Determine and plot the water pressure and at-rest lateral earth pressure acting on the wall. Show the pressure distributions separately (not combined into one distribution). wall.