A concrete cube ( y = 23.5 kN/m3 ) 0.60 m on an edge is submerged in 5 m of seawater (sg=1.03). Calculate the force to lift the cube if there is no seepage pressure at the bottom of the cube A. 23.3 kN B. 28.5 C. 27.7 D. 26.9
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A concrete cube ( y = 23.5 kN/m3 ) 0.60 m on an edge is submerged in 5 m of seawater (sg=1.03). Calculate the force to lift the cube if there is no seepage pressure at the bottom of the cube
A. 23.3 kN
B. 28.5
C. 27.7
D. 26.9
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- A concrete dam retaining water is shown below, if the specific weight of concrete is 23.5 KN/m, find the factor of safety against sliding, the factor of safety against overturning, and the pressure intensity on the base. coefficient of friction between dam and foundation soil is 0.45 ? (y water 9.8 KN/m').A vertical triangular plate whose height is 3.6 meters has its base horizontal and vertex upper most in the water surface. a. Find the depth to which it must be lowered from its vertex so that the difference in level between the center of gravity and the center of pressure shall be 20cm. b. How far is the center of pressure below the water surface? c.What is the base width of the plate if the total hydrostatic force acting on the plate is 76.28 kN?A concrete gravity dam with a trapezoidal section is holding water as shown in the figure. A distance of 15 meters from the toe, a drain is located. The drain has a pressure due to uplift of zero and increasing uniformly to full hydrostatic at the heel. Upstream face 1H:5V, while downstream face is inclined 1H:2V. Which of the ff nearly gives the maximum foundation pressure on the base of the dam in kilopascal ? Assume 23.54 kN/m3 for the unit weight of concrete. a. 3114 b. 1095 c. 4115 d. 964 e. 680
- A. A concrete dam retaining water is show in the figure. If the specific weight of concrete is 23.5 KN/m^3. What is the total hydrostatic force? Find the resultant force. Find the factor of the safety against sliding if the coefficient of friction is 0.50. What is the factor of safety against overturning? Find the location of the resultant. Find the maximum intensity pressure. Determine the minimum intensity pressure.A concrete dam is triangular in cross section and (30+0.314)m high from the horizontal base. If water reaches a depth of (27+0.314)m on the vertical face, what is the minimum length of the base of the dam such that the resultant will intersect the base within the middle third? What minimum coefficient of friction is required to prevent sliding ? Determine the pressure distribution along the base. If the uplift pressure varies from half full hydrostatic at the heel to zero at the toe.A 450 kN force is transmitted by a column footing onto the surface through a square footing 1.5 m on a side. Assuming that the force exerted on the underlying soil formation spreads on 2 vertical to 1 horizontal, evaluate the pressure, in kPa exerted in footing on a soil 2.7 m below it.
- A dam rectangular in cross – section with upstream face vertical. Water is 20.4 m deep on the upstream side. The dam is 23.2 m high and 14.8 m wide at the base and weighs 2310 kg/m3. Coefficient of friction between the base and the foundation is 0.85. Compute the factor of safety against sliding. a. 3.85 b. 2.67 c. 3.24 d. 1.45An open tank 1.82m square weighs 3.425 kN and contains 0.91m of water. It is acted by an unbalanced force of 9.4 kN parallel to a pair of sides. What is the force acting in the side with the smallest depth?A rectangular plane, 1.2 m by 1.8 m is submerged in water and makes an angle of 30° with the horizontal, the 1.2 m sides being horizontal. a.) If the top edge of the plane is at the free surface, what would be the shape of the pressure distribution acting on the plane? b.) What is the minimum pressure acting on the plane in kPa? c.) What is the maximum pressure acting on the plane in kPa? d.) Determine the magnitude of hydrostatic force acting on either side of the plane in KN. Support your computations with correctly drawn and labeled pressure prism diagrams.
- A square plate having one of its side equal to 3.2 meters is immersed in water in a vertical position such that the two edges of the square would be horizontal in order that the center of pressure shall be 8cm from the center of gravity. a. How far below the water surface should the upper portion of the plate be submerged? b. What is the distance of the center of pressure from the water surface? c. Determine the hydrostatic force acting on the plate at this position.A vertical triangular plate has a base of 1m and depth of 2.1m. The base is horizontal and flushed with the water surface. What is the distance of force of water below the centroid of the plate?From the figure shown, the soil layer beneath the 203m dam has Kx = 0.3m/day and Kz = 0.4m/day. Determine the following: • Uplift force per unit length (kN/m) • Seepage through the foundation (m^3 /day)