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- A settling basin is designed with a loading rate of 25 m³ /m².day. The depth of 0.997, the basin is 2 m deep. If the specific gravity of the particles is 1.2 and water = and u= 1.027. Determine the overall removal obtained for a suspension for data are shown below. Time (min) Concentration (ppm) 80 100 180 168 0 60 189 300 130 156 420 27 240 200 111 78c) A river has the following hydraulic characteristic, Q = 450 m³/s, width 50 m, depth 6 m, bed slope 3 x 104. The sediment has a typical diameter D50 = 0.01 m and mass density 2650 kg/m'. Estimate the bed-load transport using the Einstein- Brown formulae shown below. O = qs (Ps - p)gD3 (Ps - p)D Y = pR'So Ф = 400 3An 8 m thick clay layer is located between two layers of sand. Also there is a thin drainage layer within clay layer at a depth of 3 m from top. If a structure is constructed above clay layer, the time required in days to attain half the ultimate settlement is (Assume T, = qu" is valid for whole range of consolidation.) 4 [Take C,= 4.2 × 10-2 mm²/s]
- 6. The sludge hopper of a sedimentation tank is approximated as a truncated square prism provided with an orifice of 100 mm dia. at its bottom as shown in the figure. The sludge is being discharged through the orifice Determine the time taken for emptying the hopper. Assume Cd=0.62. 2m 1m E im -Problem 6.104 The shovel of the excavator is supported by a pin support at E and the two-force member BC. The 270-lb weight W of the shovel acts at the point shown. (Figure 1) Figure Hydraulic cylinder 44°F Partly cloudy B 15 in 9+ 3 in 12 in 12 in 7 in 20 in < 1 of 1 Shovel Search Provid5. The coefficient of permeability of a sand at a void ratio of 0.62 is 0.03 cm/sec. Estimate the coefficient of permeability at a void ratio of 0.48. Using Casagandre equation Using Kozeny-Carman equation Find the difference in the rate of flow using the results of “a” and “b” if i = 0.70 and A = 0.6 m2.
- Q:When B1/z=0.5 & B2/Z=0.25, so find 15 ? I=? TABLE 8.8 Influence Factor I, by Equation (8.11) (Half Embankment Load) B,/z B,/z 0.01 0.02 0.04 0.06 0.1 0.2 0.4 0.6 0,8 2 4 6. 8 10 0.003 0.006 0.013 0.019 0.032 0.063 0.121 0.172 0.215 0.250 0.352 0.422 0.447 0.460 0.468 0.1 0.066 0.069 0.076 0.082 0.094 0.123 0.176 0.221 0.258 0.288 0.375 0.434 0.455 0.466 0.473 0.2 0.127 0.130 0.136 0.141 0.153 0.179 0.227 0.265 0.297 0.322 0.394 0.444 0.462 0.471 0.477 0.3 0.183 0.186 0.191 0.196 0.206 0.230 0.271 0.303 0.330 0,351 0.411 0.452 0,468 0,476 0.480 0.4 0.233 0.235 0.240 0.245 0.253 0.274 0.308 0.336 0.358 0.375 0.425 0.459 0.472 0.479 0483 0.5 0.277 0.279 0.283 0.287 0.294 0.311 0.340 0.363 0.381 0.395 0.437 0.466 0.477 0.482 0.486 0.6 0.314 0.316 0.319 0.322 0.329 0.343 0.367 0.386 0.400 0.412 0.446 0.471 0.480 0.485 0.488 0.7 0.345 0.347 0.349 0.352 0.357 0.369 0.389 0.404 0.416 0.426 0.454 0.475 0.483 0,487 0.489 0.8 0.371 0.372 0.375 0.377 0.381 0.391 0.407 0.419 0.429 0.437 0.461…A setlling chamber is used to remove sand and grit from the influent water to a wastewater treatment plant. Conditions are: Chamber Height = 3m Chamber Width = 2m Chamber Length = 7m Water Flow Rate = 0.5m3/min Particle Density = 2.65g/cm3 a) What is the minimum settling velocity required for a particle to be required for a particle to be removed by this setlling chamber? Express your answer in units of cm s-1. b) Assume that this or another setlling chamber removes all particles having settling velocities greater or equal to 0.04 cm s-1. What is the minimum particle diameter that would b e entirely removed by such a setlling chamber? Express your answer in units of micrometers. (For part (b), assume the particle being removed is approximately spherical, and the water is at 22°C (density = 997.7 kg/m3, dynamic viscosity = 0.957x10-3 kgm-1s-1). If you use Stoke’s law as part of your solution, be sure to use the Reynolds number to confirm you are in the laminar flow range.)A truck delivers 20,000 kg of HMA to the paver. The paver is placing a 4.3 m wide 40 mm thick mat that has a density of 2305 kg/m ³ Calculate the 1. distance the paver should travel. three trucks weighing 14,566kg, 15230kg, and 14021kg deliver HMA to the paver. The mat is 4.5m wide and 55mm thick with a density of 2250kg/m ³ If the starting station is 8+915, at which station (to the meter) should the paver be at after all 3 trucks have dumped? 2. 3. A paving job is nearing completion, and the foreman needs to let the plant know how much HMA is needed to complete. The calculations are based from station 1+330, and the finish station is 1+343. The mat is 3.7m wide x 55mm deep. The density at laydown is 2350kg/m ³ Calculate the mass required to finish the job in kg.
- QI (a) Many catastrophic failure occurred in geotechnical engineering due to instability of soil mass. Design a flow net in geotechnical system is need for solving groundwater flow problems. A flow net for flow around a single row of sheet piles in a permeable soil layer is shown in Figure QI(a). Discuss SIX (6) characteristics for sketching a flow net in seepage. Determine the height (above the ground surface) will the water rise if piezometers are placed at points a, b, c, d, e, f. g and h. (ii Calculate the rate of flow net through flow channel II per unit length (perpendicular to the section shown) if given v = 30 mm/s and i = 7142. (b) A typical circular raft foundation is shown in Figure QI(b). The diameter of the tank is given as 10 m and the tank was loaded with uniform distributed load of 150 kN/m?. (i) Determine the vertical stress increment of soil at 5 m below the center of circular raft foundation. (ii) Calculate the differences of vertical stress increment at 5 m below…ASAPExample 2: A soil sample with 10 cm in diameter is placed in a tube 1 m long. A constant supply of water is allowed to flow into one end of the soil at A and flow out at B is collected by beaker. The average amount of water collected is 1 cm3 for every 10 seconds. The tube is inclined as shown in the figure. Determine: a. Hydraulic gradient b. Flow rate lisiya im University of Al- c. Average velocity d. Seepage velocity if e = 0.6 Of e Engine I m e. The hydraulic conductivity Soil 1 m 0.8 m
