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A conventional consolidated drained (CD) triaxial test is conducted on sand. The cell pressure is 100 kPa, and the applied axial stress at failure is 200 kPa.Required:
a. Plot the Mohr circles for both (1) initial and (2) failure stress conditions.
b. Determine Phi (assume c=0)
c. Determine (3) the shear stress on the failure plane at failure Tao,ff and find (4) the theoretical angle of the failure plane in the specimen.
d. Determine (5) the maximum shear stress at failure Tao,max and (6) the angle of the plane on which Tao,max acts; calculate (7) the available shear stress on the plane.
e. Calculate factor of safety (F.S.) on (8) the plane of Tao,max and (9) the failure plane.
Two remediation options are being considered for a contaminated land area formerly used for industrial operations. Option 1 involves removing all of the contaminated soil over a two-year period at a cost of 2.2$ million per year
what is the equation to get volume of cut and volume of fill if i used excel formulated , in construction methods.
Water is pumped at a rate of 1.57 cfs from one large open tank into another through a 6 in diameter cast iron pipe 400 ft long. The water level in the second tank is 160 ft above the level of the first tank and the discharge end of the pipe is sub..
A driver is travelling at 50 mi/h on a wet road. An object is spotted on the road 500 ft ahead and the driver is able to come to a complete stop just before hitting the object.
(a) Use differentiation to find a general expression for the rocket's velocity as a function of time, (b) When is the velocity zero?
The wind blows horizontally in a direction which is parallel to one of the diagonals of the cross section. Careful measurement shows that, at height y from the ground, the magnitude of the wind velocity is given
Calculate the primary consolidation settlement for the CH layer, assuming that it is normally consolidated with a water content of 70% and a compression index of 0.25.
A runway used for landing only is used by two types of aircraft, one with an airspeed of 120 knots (nautical miles/hr) and the other with an airspeed of 150 knots. The length of common approach path is 6 nautical miles.
A municipal WWTP discharges 22.5 MGD of secondary effluent containing 45 mg/L of ultimate BOD at 26.7 oC with 1.3 mg/L of dissolved oxygen. The stream flow is 237 ft3/s at a velocity of 2.1 ft/s and an average depth of 7 ft.
Nitrogen is compressed from 80 kPa and 27?C to 480 kPa by a 10-kW compressor. Determine the mass flow rate of nitrogen through the compressor, assuming the compression process to be (a) isentropic
A 4000-m 3 /day conventional activated sludge plant has an influent with a BOD5 of 190 mg/L and SS of 225 mg/L. What population would this plant serve?
A simple way to model air pollution over a city is with a box model that assumes complete mixing and limited capability for the pollution to disperse horizontally or vertically except in the direction of the prevailing winds
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