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Your next project site is an old landfill, which reaches a depth of 30 feet. Below, there are many layers of both competent and caving soils, but none of the competent soil layers capable of giving the needed bearing capacity under the 12'' diameter and 60 feet deep drilled shafts that you are to use. It is known that the layer at 60 feet provides about 20% of the bearing capacity needed, and all the competent soil layers up to this depth provide an accumulated 50% of the necessary friction.
Understanding that according to design specifications the drilled shaft diameter needs to be kept at 12" diameter and up two consecutive pre-fabricated piles can be used (120 feet). Assuming that the soil layers continue much beyond 60 feet in a similar pattern (obviously no landfill) in terms of friction and bearing capacities, recommend two different solutions that could allow the shafts to transmit their loads by 1) end bearing capacity and by 2) friction. If an underream at 60 feet was to be used, which needs to be its minimum diameter?
The height of the instrument during this measurement was 1.60m From the same setup from point A, the zenith angle and slope distance toward point B are measured as 83deg 32'30" and 186.23m respectively, while the elevation of point B is 315.34m AM..
The dry density of a compacted sand is 1.87 Mg/m^3 and the density of the solids is 2.67 Mg/m^3. What is the water content of the material when saturated. Include a phase diagram.
A ssume that one half of the energy incident on the collector goes to this reservoir, which, in turn, serves as a source for a heat engine. If the temperature of the atmosphere is 70 F,
Water with a static pressure of 1.96kN/M2 flows through an 800 mm diameter pipe. A pitot tube pressure gage in this pipe reads a pressure of 5.88 kN/M2. How do you determine the volume flow rate (Q) of the water? (Q = 1.40 M^3/sec, V=2.79 M/sec)
A wood mallet has a cylindrical head 6 inches long and 3 inches in diameter. If the cylindrical head is 1 inch in diameter how long must it be for the mallet to balance at a point 6 inches from where the handle enters the mallet
a water of 20 c temprature pupped at 75 kpa to a perforated pipe 5 cm dia. contain 10 hole with the same diameter. the distance between two adjacent hole is 20 cm. what is the discharge of each hole
a tank contains 650 cubic feet of water.the water will be applied on 7 acres of land. What would be the the depth of water im millimeters on the land assuming that there are no losses
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It rains 3.0 in. on a 20.0 acre watershed. What is the volume of rainfall excess if 30% of the watershed area is a lake and infiltration on the soil is estimated at 1.0 in. What is the total volume of runoff
A new interstate highway is being built with a design speed of 70 mi/h. For one of the horizontal curves, the radius (measured to the innermost cehicle path) is tentatively planned as 2500 ft. What rate of superelevation is required for this curve
Calculate the stopping sight distance over the crest of a 1,500 ft vertical curve with a plus grade of 4.4percent and a minus grade of 2.3 percent.
A particular crest vertical curve (VC) on US 280 at Shelton Mill Rd has long been criticized as being unsafe. Its length is 400 feet. The prevailing speed on the crest VC is 50 mph. In its present condition, its tangent grades are G1=2 percent and..
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