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Cork Institute of Technology
Bachelor of Engineering in Structural Engineering – Stage 2
Summer 2007
(NFQ – Level 8)
Engineering Practice 2
(Time: 3 Hours)
Instructions: Answer FIVE questions in total. Three questions from Surveying Section. Two questions from Construction Section. All questions carry equal marks. Separate answer books to be used for each Section.
Examiners: Mr. T. Buckley Mr. C. Mooney Mr. P. Anthony Prof. P. O’Donoghue
Section A – Surveying
All dimensions are in metres unless otherwise stated.
Q1. The following are the field data from a closed traverse survey: Co-ordinates of A = 430.000E, 410.000N WCB of line AB = 356° 13' 27" Line Length Station Included Angle AB 45.450 A 169 ° 15’ 46" BC 55.533 B 258 ° 31' 11" CD 57.842 C 267 ° 31' 18" DE 51.993 D 230 ° 59' 25" EF 50.055 E 215 ° 24' 35" FA 57.598 F (^298) ° 15' 08"
(a) Plot the data at a scale of 1:1000. (5 marks) (b) Tabulate the data and establish the co-ordinates of each station. (12 marks) (c) Explain the advantage of using a closed traverse survey. (3 marks)
Q2. The table below shows the readings obtained on a tacheometric survey using a theodolite set up at A with a height of instrument of 1.450 m and a reduced level (on the ground) of 99.000 m.
(a) Calculate the horizontal distances AB, AC and BC. (5 marks) (b) Calculate the reduced levels of B and C. (5 marks)
Target Horizontal
Angle
Vertical Angle
Stadia Top
Stadia Bottom
Stadia Centre
B 0 o^ 00’00” +7 o^ 10’00” 2.137 1.875 2.
C 78 o^ 52’00” +9 o^ 32’20”
___ ___
C 78 o^ 52’00” +8 o^ 05’40”
___ ___
(c) Two straights xy and yz deviate by 47 o^ 09’20”. They are to be joined by a circular curve of 50 m radius.
Calculate the lengths of the following :
I. The long chord joining the tangent points II. The shortest distance from the curve to the intersection point Y. III. The tangents. IV. The curve. (10 marks)
Q3. (a) Describe with the aid of sketches, the relationship of the three main axes in a theodolite, which is in perfect adjustment. (5 marks)
(b) Describe three field tests which should be carried out to check the permanent adjustment of a theodolite, explaining the effects of maladjustment in each case. (15 marks)
Section B - Construction
Q6. (a) Describe, including illustrations, the construction sequence for replacement (bored) piles, distinguishing between rotary bored and continuous flight augered piles. ( marks) (b) Discuss the uses and benefits of diaphragm walls. (8 marks) (c) Distinguish between contiguous and secant piling/walls. (4 marks)
Q7. (a) Discuss the merits and demerits of the following materials for the construction of a framed multi-storey building: (i) Structural steel (ii) In situ reinforced concrete (iii) Precast reinforced concrete (10 marks) (b) Illustrate a typical connection detail for the following: (i) Between a steel column and a concrete foundation. (5 marks) (ii) A steel column splice (for columns of unequal size). (5 marks)
Q8. (a) Identify the performance criteria for roofs. ( marks) (b) Explain and illustrate the various structural forms in common use for large span roofs. (15 marks)
Q9. (a) Illustrate a typical pavement make-up for use on Irish National (N) or Motorway roads, comment on the importance of each layer, and propose a suitable material for each layer. (10 marks) (b) Discuss the characteristics, advantages and disadvantages of Porous Asphalt as a surfacing material on Irish roads. (10 marks)
