b) A 6.1 m high retaining wall consists of 2 layers of soils (Figure QIb). Soil 1 is above the water table having friction angle, o' of 30° and unit weight, y of 16 kN/m³. Soil 2 having a friction angle, o' of 36°, and saturated unit weight, Yat is 19 kN/m³ Both soil layer has a cohesion, e' of 0. Determine the Rankine active force per unit length of the wall and the location of the resultant line of action. Sketch the pressure distribution diagram as well.

A retaining wall supports a horizontal backfill that is composed of two types of soil. The first layer is 4.79 meters high. It has a unit weight of 16.61 kN/m3. The second layer is 6.58 meters and has a unit weight of 18.72 kN/m3. If the angle of friction for both layers is 34°, determine the total active force (kN) acting on the retaining wall per unit width. Final answer should be in two decimal places.

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

Assume a smooth retaining wall as shown below. Calculate the hydrostatic force acting on the right side of the wall in kN per unit length (considering a 1 m length in the out-of-plane direction). The soil properties shown in the figure apply to either side of the wall  g = 9.81m/s2

A thin clay layer passes through the soil at an angle of 30° behind an 8m high gravity retaining wall. A structure 5m wide, applying a uniform stress of 40kPa to the sandy soil, also acts on this section of soil as shown in Figure 3.1. The properties of the clay are ??=25???, ∅?=0, ?′=0 and ∅′=20°. The sandy soil properties are ?′=0, ∅′=35°, ????=16??/?2, ????=20??/?2, and between the sand and the wall the properties are ?′?=0 and ∅′?=30°. Assuming that failure occurs along the clay layer, use Coulomb’s method to calculate the horizontal force required from the wall in the short term to prevent slip.

A retaining wall supports a horizontal backfill that is composed of two types of soil. The first layer is 4.74 meters high. It has a unit weight of 17.25 kN/m3. The second layer is 6.6 meters and has a unit weight of 18.4 kN/m3. If the angle of friction for both layers is 32°, determine the total active force (kN) acting on the retaining wall per unit width. Use stored value. Answer in 5 decimal places.

A square column foundation with base of 1.51 m is shown in the figure. It carries an axial load of 468 kN and has its bottom resting on the ground water table located h1 = 1.4 m. below the ground surface. h2 = 0.8 m and h3 = 2.5 m. Compute the settlement of the clay layer in millimeter caused by primary consolidation if the preconsolidation pressure of the clay is 98 KPa. |P Shy h1 kak 1:1:1 2222 1:1 I Dry Sand Wet Sand Clay Soil Properties: Unit Weight of Dry Sand = 15.4 KN/m3 Saturated Unit Weight of Sand = 19.4 KN/m3 Saturated Unit Weight of Clay = 18.6 KN/m3 Compression Index = 0.264 Void Ratio of Clay = 0.75 Swell Index = 1/5Cc 11 LEE ILLI CEET EEGGE LLLLLLI TELLIT 1

Question 2 For the gravity retaining wall (concrete) shown in figure below; if the angle B has changed to be 80°, Ø1= 29°; and a = 5° use Coulomb's theory to calculate the horizontal and vertical components of the active earth pressure. %! Y-18.5 kN/m :-32 5.7 m 5m 283 m P. 75 2.167 m 1.5 m 1.53 m 0.8 m 0.22 m - 18 KN/m 0.3 m 0,8 m :-24 3.5 m 30 KN/m?

(c) The soil profile at a site consists of 2 m of clay (G, = 2.7, e = 0.5) overlying a deep deposit of gravel (G, = 2.55, e = 1.0). If the water table is at the top of the clay, determine the depth at which the effective vertical stress is 100 kPa.

Find the passive earth pressure coefficient. For a vertical retaining wall having a backfill of dry sand inclined at an angle of 20° from the horizontal