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CORK INSTITUTE OF TECHNOLOGY
Bachelor in Engineering in Civil Engineering - Stage 2
Summer 2009
Construction and Measurement – (Old Syllabus)
(Time: 3 hours)
Examiners: Mr. D. Cadogan Mr. J. Lapthorne Mr. J. Kindregan
Instructions:
Answer Question 1 and TWO other questions from Section A.
Answer TWO questions from Section B.
Use separate answer books for Section A & Section B.
Section A
- Give answers to four of the following questions: (4 x 5 marks)
(a) Short-bore piles are to be placed under the foundations of a proposed domestic dwelling, as a result of soil conditions. Describe briefly the construction method for this form of pile, and the preferred locations for the piles, explaining the necessity for these at each position.
(b) Describe the individual construction and use of northlight and monitor roofs.
(c) Briefly describe the construction process, and basic precautions employed, in undertaking a tremie concrete pour.
(d) Describe the types of tower crane available, and their individual assembly procedures and advantages.
(e) Discuss the basic procedure involved in constructing a cast-insitu diaphragm wall , along with some of the problems that have to be overcome.
(f) Describe fully, with the aid of diagrams, the perimeter trench method utilised in basement excavation.
- (a) Discuss the preliminary works to be carried out prior to trench excavations, to include considerations for existing services and structures and traffic management. (5 marks)
(b) Describe fully the installation process for anchors , used to increase the stability of the diaphragm walls. (6 marks)
(c) Outline the three forms in which ready-mix concrete can be ordered for delivery. Describe three advantages and three disadvantages of ready-mix concrete, in comparison to on-site mixing. (3 marks)
(d) Discuss the terms total structural load and nature of soil , which are critical to the choice and design of foundations. (2 marks)
(e) Describe the phenomenon of boiling in regard to soils in excavations. (2 marks)
(f) Explain the mechanism of a diesel impact hammer , used in driving steel sheet piles. (2 marks)
- (a) Using sketches, outline the difference between the standard auger rotary boring system and the continuous flight auger ( CFA ) system of bored piling. (4 marks)
(b) When steel sheet piles remain in waterlogged ground over a long period, there is a risk of corrosion. Outline some of the methods used to minimise this condition. (3 marks)
(c) Describe briefly the process used in the miga-pile underpinning method, to strengthen existing foundations. (4 marks)
(d) Outline the difference between contiguous and secant piling. (2 marks)
(e) Describe the application and construction of the various forms of strip foundation under a domestic dwelling – use sketches where necessary. (4 marks)
(f) Explain the use and structure of a bulldozer. Identify the main operations in earthworks that constitute haul times. (3 marks)
- (a) Describe four support mechanisms to prop up trench walls, using sketches to illustrate. (6 marks)
(b) Outline, with the aid of sketches, the step-by-step process for the use of raked shores in the construction of walls and floor slab for a shallow basement. (4 marks)
(c) Outline the process used in the traditional underpinning method to strengthen existing foundations, with the aid of sketches. (4 marks)
(d) The flexible pavement is the primary form applied to road construction in Ireland. Using a cross-sectional diagram, describe each layer used in this structure, and its role within it. Outline the advantages of flexible pavements over the rigid construction. (6 marks)
