Pile hammer selection by driving stress analysis Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/f7623g296

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  • This paper presents an application of the wave equation to the problem of selecting a driving hammer for prestressed concrete piles. The potentially damaging effects of these types of hammers on various prestressed concrete piles were analyzed by means of parametric studies carried out on a hypothetical group of problems and two case histories. A computer program written by T. C. Edwards and largely based on the work of E. A. L. Smith was used to analyze the driving stresses produced in the pile by driving it with steam-air hammers. For each hammer the variation of driving stresses in the pile due to variations of cushion characteristics, soil resistance, depth of embedment, length of pile and variations in the soil properties was studied. Throughout the study it was seen that the tensile stresses produced by a single acting hammer were much higher than corresponding stresses produced by a double acting hammer of the same energy with a heavier ram. The velocity of impact of the ram was found to be of major significance in determining the magnitude of the driving stresses. Finally, it was seen that although there was a close interaction between the pile-soil-cushion system and hammer that no absolute conclusion can be made regarding the suitability of a certain hammer for all piles, Each situation should be considered individually on the basis of a similar approach to the one followed in this study.
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  • File scanned at 300 ppi (Monochrome) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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  • description.provenance : Made available in DSpace on 2014-01-08T16:10:45Z (GMT). No. of bitstreams: 1 BarreroQuirogaFranklin1974.pdf: 860673 bytes, checksum: 6e35788927c474c8e418126d86622507 (MD5) Previous issue date: 1974-04-01
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