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A tunnel runs inside an embankment that supports a highway, as shown in Figure P14.13. The equivalent hydraulic conductivity of the embankment soil is k = 8 ×10-5 cm/s.
(a) Draw the flow net within the embankment for the worst-case scenario.
(b) Determine the uplift force per unit length at the base of the tunnel.
(c) Determine if piping would occur if the unit weight of the soil in the embankment were 18.8 kN /m3.
A hydraulic jump is observed to occur in a channel with a mild slope at a flow rate of 20cfs/ft. If the depth before the jump is 1 ft, determine the depth after the jump.
Identify which project stakeholders participated and the nature of their participation - providing models, using models and the personal benefits.
A container of petrol on a set of scales is used to measure the rate at which fuel is used by an engine under test. In one test the weight measured by the scales decreases by 25.0 N in 1 hour.
The velocity along a pathline is given by V (m/s) = s^2 x t^(1/2) where s is in meters and t is in seconds. The radius of curvature is 0.5 m. Evaluate the acceleration along and normal to the path at s = 2m and t = 0.5 seconds.
Using the method of Lee et al., predict the temperature required in an isothermal plug flow incinerator to reduce the xylene level in a waste gas from 100 ppm to 10 ppm. Assume a residence time of 0.7 sec.
A large tank is used to calibrate the reading from a flow meter. Measurements of the system weight as a function of time are made. Water enters the tank vertically from the flow metering system at a speed of 20 ft/sec through a 1.5 in. diameter pipe...
If an aerial photograph is taken with this camera tilted angleA=35° at an altitude 5000ft., calculate for the ground distance of the angular coverage 60°.
determine the width of the flume to be used such that the depth of flow immediatly upstream of the throat under design conditions is 1 m. By what percentage is the capacity of the flume reduced if the downstream depth is 0.85m
A particle enters a 20 meter long rectangular settling tank an travels with the flow at a horizontal velocity of 0.09 meters per second. If the tank is 2 meters deep and the particle enters the tank at the surface of the water, what is the longest am..
Using the cyclic relation and the first Maxwell relation, derive the other three Maxwell relations.
The design discharge is 9.5 m^3/sec and the inlet will be submerged but not the outlet. Determine the depth that will result upstream (above the invert) during the design flood event.
Due to a leak in Pump Station 1,the Alaska pipeline is shut down briefly.The pipe line is half full.Assume the pipe is welded horizontally at its midpoint.What is the tensile force on the weld per foot? Assume Ø=40”and ?oil=53.55lb/ft3.
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