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A borehole at a site for a proposed building reveals the following soil profile:
A building is to be constructed on this site with its foundation at 2 m below ground level. The building load is 30 MN and the foundation is rectangular with a width of 10 m and length of 15 m. A sample of the clay was tested in an oedometer, and the following results were obtained:
Calculate the primary consolidation settlement. Assuming that the primary consolidation took 5 years to achieve in the field, calculate the secondary compression for a period of 10 years beyond primary consolidation. The secondary compression index is Cc/6. [Hint: Determine ep for your σ'fin from a plot of e versus σ'z (log scale).]
A pin-connected truss is loaded and supported as shown. Each aluminum member has a cross-sectional area of A = 2.6 in.2. Assume a = 4.75 ft and b = 5.70 ft. If the normal stress in each member must not exceed 60 ksi, determine the maximum load Pma..
The magnetic declination of 1986 was 5 degrees 15 minutes. The magnetic bearing of a line was N 89 degrees 49 minutes W. At todays present the magnetic bearing of a line is S 88 degrees 20 minutes W.
determine the power developed by the force when t = 5s. Hint: First determine the time needed for the force to cause motion.
A 400ft equal-tangent sag vertical curve has its PVC at station 200 + 00 and elevation 250ft. The initial grade is -5.0% and the final grade is +2.5%. Determine the elevation of the lowest point of the curve.
Calculate the minimum-sized sand particle that would be removed in the chamber. To be removed, the particles must settle the depth of 2 m during the period the wastewater spends in the chamber (dT=V/Q).
A 2000-lb wheel load is to be supported by aggregate over soil with a maximum bearing pressure of 1000 lb/sqft. What depth of aggregate is needed if the angle theta is 40 degrees
A river is 6m deep. The riverbed material has a saturated unit weight of 19.5kN/m3. What is the effective vertical stress 12m below the water surface. Assume the water is static and assume a datum at the water surface.
For a groundwater hydrology problem, if you have an unconfined aquifer, and someone inserts an impermeable wall into the middle of it (a wall that starts at the bottom and does not stretch the full height of the aquifer),
Calculate the mass of the green house gas and ozone depleting substance CFC-11 (chemical Formula = CCl3F) in the atmosphere. Use units of GtC (giga tonnes carbon)
Is the test result reasonable? Explain your answer.
flow of 600cfs is measured at a depth of 3.4 ft in trapezoidal channel with bottom width of 25ft and side slopes of 3:1(h:v). The channel reach has a slope of .002. Estimate the channel roughness.
the If the probability that fluorecent light has a useful life of at least 500 hours is 0.85, find the probabilities that among 20 such lights (a) 18 will have a useful life of at least 500 hours;
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