N 0 2 m 1 m y = 15.72 kN/m³ φ' = 30° ci = 0 Groundwater table Ysat 18.86 kN/m³ $2 = 26° c₂= 10 kN/m² (a) or the retaining wall shown in picture, etermine the Rankine passive force and the ankine active force per unit length of the all. Also find the location of the resultant ne of action.
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- Consider the retaming wall shown in the Figure below Calculate the Rankine passive force per unit length of the wall and the location of the line of action of that resultant at which it acts on the retaining wall. 15.72KN/m3 1=30 C1=0 WT "sat= 15.72KN/m3 12=26 C1=10KN/m2 2 mConsider the retaiming wall shown in the Figure below Calculate the Rankine passive force per unit length of the wall and the location of the line of action of that resultant at which it acts on the retaming wall, - 15.72KN/m3 1=30 C1=0 2. WT rsat3D15.72KN/m3 12=26 E C1-10KN/m2 For the frictionless wall retaining a stratified soil and shown in Fig. E3.2, determine: (a) The active lateral earth pressure distribution with depth. (b) The passive lateral earth pressure distribution with depth. (c) The magnitude and location of the active and passive forces. (d) The resultant force. (e) The ratio of passive moment to active moment. 4, - 20 kPa m 7s19 kNms d =250 C-O Yser=20 kNm ダ=30 Hm4- A moderately curved channel with a slightly rounded non-cohesive bed material with a diameter of d50 = 25 mm carrying a discharge of 30 m³/s. The longitudinal slope of the channel is 0.001 and the side wall slopes are designed to be 60% of the angle of repose of the bed material Note: Use the Strikler's formula to calculate Manning's value. Use the Swammy and Mittal's formula to estimate the critical shear stress. Use the free board depth of 0.5m. a) Design the channel using the tractive force method for a Boly ratio of 20 b) Design the channel using the most efficient hydraulic section c) Discuss about the channel stability and erosion for both designs in parts a and b Strickler (Chow, 1959) proposed a correlation between the mean diameter of bed material, dso, and the Manning's coefficient as: n = 0.039d¹/6 Swamee and Mittal (1976) proposed an explicit equation to express the Sheild's curve defined as: 50 0.409d² 1/2 (1+0.177d² )¹/¹² T = 0.155+.
- 4- A moderately curved channel with a slightly rounded non-cohesive bed material with a diameter of d50 = 25 mm carrying a discharge of 30 m³/s. The longitudinal slope of the channel is 0.001 and the side wall slopes are designed to be 60% of the angle of repose of the bed material Note: Use the Strikler's formula to calculate Manning's value. Use the Swammy and Mittal's formula to estimate the critical shear stress. Use the free board depth of 0.5m. a) Design the channel using the tractive force method for a Bo/y ratio of 20 b) Design the channel using the most efficient hydraulic section c) Discuss about the channel stability and erosion for both designs in parts a and b Strickler (Chow, 1959) proposed a correlation between the mean diameter of bed material, deo, and the Manning's coefficient as: n = 0.039d¹/6 Swamee and Mittal (1976) proposed an explicit equation to express the Sheild's curve defined as: T = 0.155+ To 50 0.409d² (1+0.177d²)Consider the retaining wall shown in the Figure below. Calculate the Coulomb's active force per unit length of the wall and the location of the line of action of that resultant at which it acts at the retaining wall. Surcharge = q = 96 KN/m² a = 59 Y 18 KN/m d'= 30° H= 1m & = 20° 90 0= 85oConsider the retaming wall shown m the ligure below Calculate the Rankine passive force per unit length of the wall and the location of the line of action of that resultant at which it acts on the retaming wall. 15.72KN/m3 1=30 C1=0 WT sat%3D15.72KN/m3 112=26 C1=10KN/m2
- Consider the retaining wvall shown in the Figure below. Calculate the Coulomb's active force per unit length of the wall and the location of the line of action of that resultant at which it acts at the retaining wall. Surcharge = g = 96 KN/m? a = 59 Y = 18 KN/m * 30° c'=0° H= im 20° 90 0 = 85°12.6 For the retaining wall, H = 8 m, 6' = 36°, a = 10°, %3D y = 17 kN/m', and e' = 0. a. Determine the intensity of the Rankine active force at z 2 m, 4 m, and 6 m. b. Determine the Rankine active force per meter length of the wall and also the location and direction of the resultant. 12.7 Given: H = 7 m, y = 18 kN/m', ' = 25°, c' = 12 kN/m2, and a = 10°. Caleulate the Rankine active force per unit length of the wall after the occurrence of the tensile crack. YI Groundwater table H H. Figure P12.2The head loss in 50 m long, 12 cm diameter pipe is known to be 6 m when liquid specific gravity is 0.9 and viscosity of 0.04N-s/m² at 0.06 m/s. Find the shear stress at the wall of the pipe. a. 31.78 Pa b. 63.2 Pa c. 126.4 Pa d. 15.8 Pa
- 4. A retaining wall shown in the figure, determine the Rankine Active force, Pa, per unit length of the wall and the location of the resultant. H = 10 ft, H1 = 5 ft, Y1 = 105 lb/ft? , Y2 = 122 lb/ft? , þ1 = 30° , þ2 = 30° Sand Y1 H1 ci = 0 Groundwater table H. Sand Y2 (saturated unit weight) c2 = ( Frictionless wallFigure Question 2 depicts the design of a gravity retaining wall for carthquake condition given: Kv-0 and Kh-0.37 What should be the weight of the wall for a zero-displacement condition? Use a factor of safety of 2.4. What should be the weight of the wall for an allowable displacement of 50.95 mm? Sand $:= 35° %3D Sand $=37 3. Figure Question 2 B Give a comprehensive detail on how to analyze a retaining wallA 60 cm Cl main pipe leads from a reservoir whose water surface is at Elev. 1590 m. Below the ground surface level, the main pipe is horizontally positioned at Elev. 1410 m. Assuming static condition, what is the stress in the pipewall if the wall thickness is 12.50 mm and the soil pressure is 520 kPa? a. 18.2 MPa O b. 20.5 MPa O . 28.7 MPa O d. 32.6 MPa