Find the width of elementary gravity dam whose height is 100 m. specific gravity of dam material is 2.7. And seepage coefficient at the base C = 0.7.
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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 18m and the distance between the base of the dam and the downstream water surface is 18m. Assume z=35m and width of dam = 40m. a. Determine the seepage flow (m3/day) b Determine the uplift pressure (kpa) at A. c. Determine the uplift force (x10^3 kN) acting in the dam. Assume that the uplift pressure under the dam varies uniformly.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 raft foundation 60 X 40 m carrying a net pressure of 145 kN/m^2 is located at adepth of 4.5 m below the surface in a deposit of dense sandy gravel 22 m deep: thewater table is at a depth of 7 m. Below the sandy gravel is a layer of clay 5 m thickwhich, in turn, is underlain by dense sand. The value of mv for the clay is 0.22 m^2/MN. Determine the settlement below the centre of the raft, the corner of the raftand the centre of each edge of the raft, due to consolidation of the clay.
- A 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 mason art dam has a pervious and as foundation determine the maximum permissible upward gradient. The effect of safety of four is required against boiling for sand. porosity=45%,Gs=2.65A 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
- 1. A rectangular dam with base equivalent to 2.5-meters and height equivalent to 6-meters holds water with an upstream height of 4.5-meters. Compute for the factor of safety against sliding and overturning. Unit weight of concrete is 23.54 kN/cu.m. Consider 1 meter length strip. Disregard hydrostatic uplift pressure. The coefficient between the dam and the foundation is 0.4.Determine the pressure intensity on the base of the Dam shown. Consider without hydrostatic uplift. Unit weight of concrete is 24 kN/m^3.A gravity dam of trapezoidal cross-section with one face vertical and horizontal base is 22 m high and has a thickness of 4 m at the top. Water upstream stands 2 m below the crest of the dam. The specific gravity of masonry is 2.4. FS(sliding) = 1.5
- A rectangular gravity dam has a height 5 m. It retains 3 mdeep of water. Calculate the minimum width of the concrete damthat is necessary to prevent the dam from sliding. The specificgravity of the concrete is 2.4 and the coefficient of frictionbetween the base of the dam and the foundation is 0.50. Use factorof safety against sliding of 1.5. a. 3.214 m b. 2.345 mc. 1.125 m d. 1.254 mA deposit of cohesionless soil with a permeability of 0.3 mm/s has a depth of 12 m with impervious ledge below. A sheet pile wall is driven into this deposit to a depth of 8 m. The wall extendsabove the surface of the soil, and a 3 m depth of water acts on one side. Sketch the flow net and determine the seepage quantity. a. 600 ml/s/meter length b. 300 ml/s/meter length c. 1200 ml/s/meter length d. 900 ml/s/meter lengthA concentrated load of 1000 kN is applied at the ground surface. Compute the vertical pressure a) at a depth of 4 m below the load, b) at a distance of 3 m at the same depth. Use Boussinesq's equation. Ans: a) 30 kPa, b) 9.8 kPa