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Cork Institute of Technology
Bachelor of Engineering (Honours) in Structural Engineering – Stage 2
(Bachelor of Engineering in Structural Engineering – Stage 2)
(NFQ – Level 8)
Summer 2005
Engineering Practice II
(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
Examiner: Mr. T. Buckley Mr. J. Kehoe Mr. T. Corcoran Prof. P. E. O Donoghue
Section A – Surveying
Q1. The following are the field data from an open traverse survey:
Co-ordinates of A = 560.000E, 470.000N WCB of line AB = 117^0 30' 02"
Line Length Station Included Angle AB 51.916 A 400 09' 36" BC 54.850 B 134 0 25' 24" CD 47.496 C 780 11' 33" DE 48.962 D 860 49' 56" EA 34.136 E 2000 24' 36"
(a) Plot the data at a scale of 1:1000. (5 marks)
(b) Tabulate the data and adjust the traverse using Bowditch’s method. (10 marks)
(c) Calculate the accuracy of the traverse and comment on it. (5 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” +7o^ 10’00” 2.137 1.875 2.
C 78 o^ 52’00” +9o^ 32’20”
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C 78 o^ 52’00” +8o^ 05’40”
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(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, using sketches if necessary, the main parts used in the construction of a theodolite. Explain the function of these parts. (8 marks) (b) Show the relationship between the three axes in a theodolite. (4 marks) (c) Discuss the errors which may arise when measuring angles with an optical theodolite. (8 marks)
Section B – Construction
Q6. (a) With reference to piled foundations, describe and illustrate the construction sequence for both replacement and displacement piles. (8 marks) (b) Distinguish between contiguous and secant piling. (4 marks) (c) Illustrate the construction process for a cast in situ diaphragm wall. (8 marks)
Q7. (a) Identify the criteria that should be considered when selecting a basement construction method for a confined city centre site. (5 marks) (b) Explain and illustrate with sketches three methods of constructing a three storey basement in a confined city centre site. (15 marks)
Q8. (a) Identify the performance criteria for roofs. (5 marks) (b) Explain and illustrate the various structural forms in common use for medium and large span roofs. (15 marks)
Q9. (a) Discuss the advantages and disadvantages 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 (9 marks) (b) Illustrate and annotate a typical connection detail between: (i) A structural steel column and pad foundation (5 marks) (ii) A precast concrete column and beam (6 marks)
