(Flow Nets] (1 a. Seepage tiow rate (Q) per meter width of dam in L/s. b. Determine the uplift pressure at A and B in kPa. c. Determine the uplift force per meter of dam. Assume that uplift pressure under the dam varies uniformly. a) For masonry dam shown in figure below, of k = 5m/day .Determine 35 m 17 m
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- A masonry dam has a coefficient of permeability in the vertical and horizontal directions of kz=4m/day and kx=5m/day, respectively. The difference in the head is 18 m and the distance between the base of the dam and the downstream water surface is 18m. Assume z=35 m and width of Dam =40m Determine a) the seepage flow b) the uplift pressure (kpa)at point A C) the uplift force (Kn) acting in the dam. assume that the uplift pressure under the dam varies uniformly1. A trapezoidal channel has a bottom width of 6 m and side slopes of 2H:1V. If thedepth of flow is 1.2 m and the flow is 20.40 m3/s,a. Compute the specific energy b. Compute the slope of channel if n = 0.014 c. Compute the average shearing stress at the boundaryA concrete gravity dam has the following data: Maximum water level = 300.00 m Bed level = 220.00 m R.L top of dam = 304.00 m %3D The d/s slope of 0.67:1 starts at RL of 295.00 m U/s face is vertical. Center line of the drainage gallery = 8.0 m from u/s face. Consider only weight of dam, water pressure and uplift pressure. Calculate only the normal stresses at the toe and heel of the dam, assuming 100% uplift pressure at the h eel and 50% at the gallery and zero at the toe.
- A circular door having a diam. of 3m closes a horizontal duct from a small diam. as shown. The center of the door is 4.5m below the dam’s water level. Assuming the unit weight of water is 9.79 kN/m3. Compute the hydrostatic force acting on the door.Determine the pressure intensity on the base of the Dam shown. Consider without hydrostatic uplift. Unit weight of concrete is 24 kN/m^3.Use 10 kN/m3 for unit weight of water. For a concrete structure that retains water, a flow net is sketched as shown in Figure H8-3. Noting the marked location of the Datum, answer the following: Mark on the figure all boundary Also mark the type of each boundary. Calculate the uplift pressures at points A, B, C, D, E, and F. Calculate the factor of safety against The seepage loss (q) per day per meter length of the (i.e. q in m3/day/m) if the permeability of the soil is k = 10-4 m/sec.
- A masonry dam having a sheet piling cutoff at the upstream and is located at a reservoir site as shown in the figure. Nf= 4; Nd= 10 and K= 0.003m/min 1) compute the seepage discharge in cu MTR/day 2) compute the uplift force acting on the base; 3) compute the exit or escape gradient of the water at the downstream tip of the dam if the length of the flow field is equal to 1.80mA masonry dam of trapezoidal cross section, withone face vertical has a thickness of 60 cm at the top,3.70 m at the base, and has a height of 7.40 m.What is the depth of water on the vertical face ifthe resultant intersects the base at the downstreamedge of the middle third? Assume that the upliftpressure varies uniformly from full hydrostatic atthe heel to zero at the toe. Follow the steps: Step 1. Solve for all the forces. Step 2. Solve for Rx and Ry. Step 3. Solve for RM and OM. Step 4. Solve for x, where we will get the value of h or the depth of water. Note: The answer must be near or exactly 5.83m.A trapezoidal cross-section mansonry dam (sg=2.4) with one vertical and one horizontal base is 24 meters high. It has a crest width of 2 meters and a base width of 12 meters. If the resultant pressure contacts the base and the outer edge of the middle third, or 2m from the centre of the base, what should be the vertical depth of the water? There is no hydrostatic pressure. Answer: h= 21.4m
- Refer to Problem 8.4. Using the flow net drawn, calculate the hydraulic uplift force at the base of the hydraulic structure per meter length ( measured along the axis of the structure).1. Which of the following least affects hydraulic gradient or slope of HGL? A. PIPE LENGTHB. PIPE DIAMETERC. TYPE OF PIPED. FLOE RATE 2. In laminar flow, which is correct?BJ: higher Re value has higher friction factorJB: lower Re value has lower friction factorGroup of answer choices A. BJ is false and JB is true B. BJ is false and JB is false C. BJ is true and JB is false D. BJ is true and JB is true 3. In a system with 4 reservoirs and 2 pipe junctions, how many continuity equations are formulate? A. 3B. 2C. 1D. 4E. 5Estimate the equivalent hydraulic bearing for flow in the vertical direction. Suppose that k1= 10 x 10^-4 cm/s, k2 = 5.0 x 10^-4 cm/s, k3 = 6.0 x10^-4 cm/s, k4 =3.0 x 10^-4 cm/s, H1 = 2.5 m, H2 =1.5 m, H3 =1.0m, H4 = 2.5 m.