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- For a cutoff wall shown in Figure 4a. Establish the flow nets (i.e. flow and equipotential lines) following all the rules (Drawdirectly on Figure 4).b. Deten:nine the quantity of seepage (m3/s perm) (coefficient of permeability, k = 2.0 x10·5 mis).c. Calculate the effective stress at point A (back of the piling) (Yu.t = 20 kNlm\d. Estimate the stability of the cutoff wall using lhe Factor of Safety, FS.GEOTECHNICAL ENGINEERING 2 - '21 QUIZ 5 A 6m retaining wall supports a soil with the following properties as shown below. A surcharge of 20 kPa is imposed on the ground surface. Water table is located between the interface of the 2 types of the soil. If soil above water table is dry, find: A. Total Active pressure acting on the wall per meter of its width. B. Location of the Resultant pressure from the base of the RW. C. Overturning moment caused by the active pressure acting on the wall. STRATUM Depth Gs e 1 2 m 2.50 0.65 28° 1.8 kPa 2 4 m 2.85 0.48 32° 2.4 kPa"For the same problem in question 17, calculate the total active force (Pa) acting on the wall." 1 Ar Pw 4.6 m Clay 7 sat = 17kN/m³, c=23kPa, = 0 Answers: 93.7 kN 114.0 KN 140.2 kN 132.6 KN 2.8m
- 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.For the retaining wall below: (a).Determine the lateral earth pressure distribution due only to the distributed load. Show your work (e.g., sample calculation) to plot the graph for distribution. b.Determine and plot the total lateral earth pressure distribution acting on the wall (assuming drained, active conditions).Geotechnical engineering (Civil Engineering) X = 6.9 Calculate lateral pressure at 2, 4, and 6m below the top on a retaining wall as shown in Fig. 1. 0.6m wide 10kN/m²(max) Xm Roll No. X 1-10 R 11-20 0.4R 21-30 0.3R 31-50 0.2R 6m 51-onwards 0.1R Show transcribed image text -30° Y-15 kN/m² Fig. 1
- For the R. Wall shown below, Draw the pressure diagram on the wall in an active pressure condition, and find the resultant Force on the wall and its location. The surcharge q = 2400 lb/ft? q = 2500 Ib/ft? w.t. c = 0 Y - 115 pef 10 H = 20° þ = 30° Y = 125 pef 10 o = 40oT 3 m 3 m P₁K,YH Ground water table For the retaining wall shown above calculate the following: A) Calculate the value of K (for either the 'active' or 'passive' earth pressure - whichever is appropriate! ...you decide). K. tan² (45° - 4) Ka 2 B) Calculate and sketch the pressure distribution on the 'back' side (soil side) of the retaining wall (show all of the relevant pressure distributions and indicate the magnitude of the distributions on the sketch). Indicate the correct units! C) Calculate the resultant horizontal force for each pressure distribution and calculate the total overturning moment about the base of the wall. Show the forces in the correct units! -KY'H D) If this wall has a 'depth' (in-and-out of the 'page') of 20-m, what is the total horizontal force applied to the wall? How much total friction force is needed between the base of the wall and the soil to provide a Factor of Safety of 2.0 against 'sliding'. (useful formulas are given below) (a) Passive y = 16 kN/m =…320 Chapter 5 Distributed Forces 5/177 Calculate the depth h of mud for which the 3-m concrete retaining wall is on the verge of tipping about its forward edge A. The density of mud may be taken to be 1760 kg/m and that of concrete to be 2400 kg/m. Ans. h = 1.99 m %3D 0.8 m 3 m Mud Problem 5/177 5/178 The two hemispherical shells are perfectly sealed
- The figure below shows a retaining wall with a horizontal backfill, which may fail in active mode. Note that the water table elevations in front of the wall and at the back of the wall are different. calculate and draw all lateral pressures acting against the wall ? Please urgent help me.. thank youKindly answer this as soon as possible. Urgent Draw a pressure distribution diagram for the data given to you and find its resultant thrust Pa per unit length of the retaining wall. Cohesion c 100kPa, d=20°v=20KN/m^3, h=5m.A 60 cm CI 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 b.32.6 MPa c.20.5 MPa d.28.7 MPa
