A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Appendix A: Pile Driving Records for All Test Sites
The study consists of an extensive field investigation in which a total of eighty-eight piles were driven at three sites. At all three sites, the piles were driven to practical refusal in underlying highly consolidated sand and gravel or hardpan, but the overlying layers represented a variety of soft clays, till clays and granular materials. A selection of pile driving hammers was used, including several light and heavy diesel hammers, air and steam hammers, and a special internal mandrel hammer. Piles were most of the steel H or steel pipe type, although a few patented type steel tubes were also included. Extensive soil profile data was collected prior to driving operations at each site and laboratory shear tests on undisturbed samples were performed. Dynamic measurements of the driving operations were made, including driving force as indicated by a special load cell, accelerations and displacements of the top of the pile. Static load tests were conducted on nineteen of the piles. Analysis of the data included a careful comparison of the driving effectiveness of the various types of hammers as reflected by blow count for equal penetration, penetration rate, and efficiency of energy transmission to the pile. The common pile driving formulas were reexamined to determine their reliability, with the conclusion that they do not permit estimation of pile capacity with any degree of certainty. It was also concluded on the other hand that soil test data, consisting of standard penetration measurements and laboratory shear tests, provide a reliable and accurate basis for estimating static load capacity. (Author)
Appendix A: Pile Driving Records for All Test Sites
The study consists of an extensive field investigation in which a total of eighty-eight piles were driven at three sites. At all three sites, the piles were driven to practical refusal in underlying highly consolidated sand and gravel or hardpan, but the overlying layers represented a variety of soft clays, till clays and granular materials. A selection of pile driving hammers was used, including several light and heavy diesel hammers, air and steam hammers, and a special internal mandrel hammer. Piles were most of the steel H or steel pipe type, although a few patented type steel tubes were also included. Extensive soil profile data was collected prior to driving operations at each site and laboratory shear tests on undisturbed samples were performed. Dynamic measurements of the driving operations were made, including driving force as indicated by a special load cell, accelerations and displacements of the top of the pile. Static load tests were conducted on nineteen of the piles. Analysis of the data included a careful comparison of the driving effectiveness of the various types of hammers as reflected by blow count for equal penetration, penetration rate, and efficiency of energy transmission to the pile. The common pile driving formulas were reexamined to determine their reliability, with the conclusion that they do not permit estimation of pile capacity with any degree of certainty. It was also concluded on the other hand that soil test data, consisting of standard penetration measurements and laboratory shear tests, provide a reliable and accurate basis for estimating static load capacity. (Author)
Appendix A: Pile Driving Records for All Test Sites
G. O. Kerkhoff (author) / L. T. Oehler (author) / W. S. Housel (author)
1965
105 pages
Report
No indication
English
Virginia Pile Manual. Volume II. Pile Driving Records
| NTIS | 1967
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