7. a) A 10 m high retaining wall supports a fully drained clay soil with a...
A 12 m high retaining wa is built to retain a 3-layered soil profile shown in Figure 2. The soil parameters are given in the figure. During raining season, ground water rises to interface between Soil 1 and Soil 2. Assume that there is no friction between the vertical wall and the soils. (i) Find the surface surcharge q that would just close the tensile crack on the ground surface at the active failure stage of the retaining wall. (5...
Question 2 (a) A 4 m high masonry retaining wall of width 1.8 is built to retain a 2-layered soil profile shown in Figure 2 on Bonham Road on Hong Kong Island with a surface sucharge of 20 kPa. The soil parameters are given in the figure. During raining season, ground water rises to interface between Soil 1 and Soil 2. Assume that there is no friction between the vertical wall and the soils. The sliding friction angle between the...
1. A retaining wall of height 7 m retains soil having an unsurcharged horizontal surface. The soil properties are c' = 0, Ⓡ' = 32, y = 18 kN/m3 and Ysat= 20 kN/m3. i. ii. Determine the distribution of horizontal stresses on the wall and the magnitude of resultant thrust when water table is at 3 m below the ground surface Determine the magnitude of resultant thrust when the water table is well below the base of the wall Determine...
A 4m high, vertical retaining wall supports Silty SAND backfill with a horizontal surface. There is a hydrostatic horizontal water table at 1 m below the ground surface. The soil has bulk unit weight = 20 kN/m3, effective cohesion=5 kPa, and friction angle= 30o. What is the value of the water force on the wall? At what distance above the base of the wall does it act?
Please
7. As shown below, a cantilever type of retaining wall of 7.3 m high with two soil layers behin d the wall. The following parameters can be used: (i) soil l: c-0, φ-40° and γ-17 kNm3; (ii) soil 2: c-5 kN m 2, ф-35° andy-20 kN/m3; Assume a reduction factor k ,2/3 to comsider the cohesion and rietion angle at the base slaby the unit wecight of concrete be assumed to be 23.5 kN/m3. Calculate the factors of safety...
17.7 A reinforced earth retaining wall (Figure 17.35) is to be 10 m high. Here, Backfill: unit weight, Y = 16 kN/m and soil fric- tion angle, $i = 34° Reinforcement: vertical spacing, Sy = 1 m; horizontal spacing, Sy = 1.25 m; width of rein- forcement = 120 mm; f = 260 MN/m²; 0,= 25°; factor of safety against tie pullout = 3; and factor of safety against tie breaking = 3 Determine: a. The required thickness of ties...
RCD3601/101/0/2019 QUESTION 8 Figura o shows the section through a neonased reinforced concrete cantilever retaining wall that will be situated on a property boundary. Grade 30/19 concrete and high tensile steel reinforcement is to be The backfill behind the wall is sloping at an angle of 15º measured from the horizontal and is subjected to an imposed load of 2.5 kN/m². A geotechnical report gave the following soil parameters: • Unit weight of soil (V) = 17 kN/m • Angle...