Published Resources Details
Journal Article
- Title
- Tasman Bridge foundations
- In
- Journal of the Institution of Engineers, Australia
- Imprint
- vol. 38, no. 6, Jun 1966, pp. 117-130
- Description
Paper No.2105, submitted by the authors on 10th December, 1965.
Dr. D. H. Trollope, MSc PhD MIEAust, is Professor of Civil Engineering, University College of Townsville, Queensland; Mr. McD. Freeman, MBE MIEAust is a Consulting Engineer, Melbourne, and was Resident Engineer, Tasman Bridge, 1962-65; Mr. G. M. Peck, BE(Hons) Meng AMIEAust is an Engineer, Public Works Department, Tasmania.[This paper was awarded the Warren Memorial Prize 1966]
- Abstract
The paper describes the problems met in installing deep bored pile foundations for the Tasman Bridge, and the methods adopted in overcoming the difficulties. One of the most important features that has emerged is the necessity for adequate pre-design sub-surface investigation. In particular, the role of seismic surveys in providing detailed information for engineering purposes needs careful evaluation. During construction some difficulties were met in installing, through clay, 54-in. dia. steel casings to depths of over 200 ft. These difficulties were attributed to "seizing" of the casing before a firm bearing stratum could be reached. It became necessary, therefore, to establish these piles essentially as "friction" (or "floating") piles. The required capacities were ultimately achieved by cyclic preloading of each pile up to its design specification. It is believed that this is the first time this principle has been used on the scale described in the paper.