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Cork Institute of Technology
Bachelor of Engineering in Structural Engineering – Stage 2
(CSTRU_8_Y2)
Autumn 2008
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. J. Kehoe Mr. P. Anthony Prof. P. O’Donoghue
Surveying Section
Q1. The following are the field data from an open traverse survey:
Co-ordinates of A = 570.000E, 410.000N WCB of line AB = 200 0 47' 20"
Line Length Station Included Angle AB 57. BC 48.570 B 288 0 48' 02" CD 54.447 C 206 0 50' 03" DE 47.533 D 2710 23' 08" EF 49.874 E 2110 46' 28"
(a) Plot the data at a scale of 1:1000 and find the length of the closing line FA. (5 marks)
(b) Tabulate the data and determine the co-ordinates of each station. (12 marks)
(c) Comment on the use of an open traverse such as this for carrying out a survey. (3 marks)
Q2 (a) Describe briefly the field test used to check for collimation error in a level. (8 marks)
(b) A sewer of length 315 m is to be constructed from the outfall at manhole A (invent level 24.140 m AOD) to manhole B at a rising gradient of 1:200. The following levelling work was carried out: Staff Reading Remarks B.S 1.456 TBM near A, RL 26.240m I.S x Top of sight rail at A I.S 1.243 Peg near sight rail at A F.S 0.758 CPI B.S 2.626 CPI I.S y Top of sight rail at B I.S 2.257 Peg near sight rail at B F.S 2.577 TBM near B, RL 26.990m
Assuming a traveller length of 3.25m is to be used, calculate the height of the sight rails above the pegs at A and B. What are the correct staff readings x and y, assuming the rails have been fitted correctly? (12 marks)
Q3. A new roadway, 5.0m wide, partly in cutting and partly on embankment is to be built. The relevant earthworks data are given below.
Chainage (m) 0 10 20 30 40 Depth of cut (m) 1.1 2.5 0 Depth of fill (m) 0 1.0 2. Side slope 1 in 2 1 in 2 1 in 1 1 in 1
(a) Calculate the cross sectional area at each chainage point. (4 marks)
(b) Calculate the volume of material excavated from the cutting. (8 marks)
(c) Calculate the volume of material required for the embankment. (8 marks)
Construction Section
- Explain and illustrate the construction sequence of the following:
(i) Bored piles (ii) Driven piles (iii) Secant Piling (iv) Contiguous Piling (20 marks)
- (a) Discuss the advantages and disadvantages of the following materials for the construction of a multi-storey building.
(i) Steel
(ii) In situ concrete
(iii) Precast concrete (8 marks)
(b) Illustrate a typical connection detail for the following:
(i) a pre-cast concrete column and beam
(ii) a steel column and pad foundation. (12 marks)
- Explain and illustrate the top down method of basement construction, clearly showing the diaphragm wall construction method. (20 marks)
- (a) Outline the factors to be considered when selecting roofing systems for multi- storey buildings. (8 marks) (b)Illustrate two roofing systems. (12 marks)
