|You are working as a Senior Engineer for a large contractor who is completing a major new roadway in Oldham, Lancashire. You have asked to help various members of the site team with the processing and communicating of the mathematical problems listed below.|
a) An area of the site has been identified as needing a specific surface treatment due to the vegetation. The area is inaccessible due to the topography of the site but a series of whole circle bearings have been recorded from Station A (300.000m East,200.000n North) and Station B (500m East, 220m North) and are on the enclosed sheet 1 for your designation
Calculate the co-ordinates of each of the points and the area enclosed within the points.
b) A section of the site has a disused canal that requires filling. The canal is width and depth are provided on sheet 2. Soil investigation has identified that angle of repose of the soil is 32°. The project requires that no surplus is produced and that no imported material is used. Calculate the depth of fill that will be required to meet this requirement assuming 95% compaction is achieved.
c) The project has a number of double cantilevered beam. The structural engineer needs to know the location of the point of contra flexure (zero bending) calculate the location to 3 decimal places
Beam 1 BM = -30x2 +210x -210
Beam 2 BM = -20x2 +210x -420
d) The site has purchased a new 360˚ excavator at a cost of £125,000. This item of plant has a weekly running cost of £420 and anticipated revenue of £980. Calculate the breakeven point and when a 16% profit is achieved in weeks.
e) Using Matrices check the outcomes for question 1a and 1d.
a) The site has a section with a suspended pedestrian bridge with a span of 270m. The sag in the suspension cables (y) is calculated by the following equation
If W = 0.16kN/m calculate y for H = 27.9kN, 54kN and 100kN
Above is the detail of a roof truss arrangement. AF and FE are 2.780m. CF is 3.450m with angles DFE 28° and FED 70°. Calculate the remaining members of the frames lengths
a) The table below shows 30 cube results from Month 2 of the project. Calculate the mean, mode & median of both x and y. Also calculate the standard deviation of the compressive strength of the cubes.
b) Present the data of month 2 density and strength in your chosen format from any software package
c) Calculate the Pearson Correllation Coefficent for the realtionship of compressive strength increasing with density and comment
d) Also test this Hypothesis to a confidence level of 90% by calculating the line of best fit
a) Your potential contracted pilling company has summarised its quality over the last five years and found,
· 3% of piles fail integrity testing
· 1% of piles fail proof load testing
· 4% of piles are out of tolerance on plan location
Calculate the probability that,
1. A pile fails proof load and integrity testing
2. A pile is out of position and fails integrity testing
3. A pile fails all three tests
b) Your imported stone supplier has 5% non-compliance rate on stone grading’s analysis. From a sample of 20 deliveries determine the probability that,
1. One sample is non-compliant
2. Two samples is non-compliant
3. All samples is non-compliant
4. All samples are compliant
c) Your materials testing logging system has a serial number with two letters and five digits. Calculate the number of permutations,
d) The movement joints for the project are being supplied by SJG Joints Ltd. In testing they have had 3 defective out of a 125 sampled. If 4 are selected ar random what is the probability of,
1. All four fault free
2. Only one defective
3. Two defective
4. Three Defective
5. All four defective
Complete a final section report which evaluates both your analytical and statistical findings from the above questions completed and justifies the techniques adopted to solve such problems. The report should include all questions including research on how trigonometry, algebra and statistics are used in construction linking it to the above questions/solutions.
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