DYNAMIC PRE-LOADING OF LARGE DIAMETER BORED PILES. PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON SOIL MECHANICS AND FOUNDATION ENGINEERING, SAN FRANCISCO, 12-16 AUGUST 1985
Foundation on large diameter bored piles in loose and medium dense non-cohesive soils is not economic in Sweden. If the non-cohesive soil beneath the pile is made more dense and if the stiffness of the soil could be measured the situation for bored piles would be better. A method to pre-load non-cohesive soil beneath bored piles dynamically has been described by Eresund (1972). Several field and laboratory tests have shown positive results, Berggren (1981). In 1983, the Swedish contractor Stabilator AB decided on development of equipment for production of bored piles. Development work was supported by the National Swedish Board for Technical Development (STU). This paper describes the theoretical background for dynamic pre-loading and the results from a field test. The test shows that the analysis of dynamic pre-loading gives a good estimate of the static behaviour of the pile tip. The test also shows that the pile can take considerably more load, 5-10 times, after dynamic pre-loading than if it was cast in an untreated soil. For the covering abstract of the conference see IRRD 287689. (Author/TRRL)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/9061915643
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Corporate Authors:
AA Balkema
P.O. Box 1675
Rotterdam, Netherlands BR-3000 -
Authors:
- Berggren, B
- Bengtsson, P E
- Lundahl, B
- Magnusson, E
- Publication Date: 1985
Media Info
- Features: Figures; References;
- Pagination: p. 1521-24
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Serial:
- Publication of: Balkema (AA)
- Publisher: AA Balkema
Subject/Index Terms
- TRT Terms: Conferences; Field tests; Granular soils; Machine valves; Support piles
- Uncontrolled Terms: Preloading
- Old TRIS Terms: Bored pile; Pile behavior
- Subject Areas: Bridges and other structures; Geotechnology; Highways;
Filing Info
- Accession Number: 00466403
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- ISBN: 90 6191 564 3
- Files: ITRD, TRIS
- Created Date: Mar 31 1988 12:00AM