A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Adfreeze Strength Characteristics of Vibratory Driven Piles
A field testing program was developed and performed for two years on Alaska's arctic North Slope. The objective of this testing program was to characterize the long- and short-term adfreeze performance of vibratory-driven piles installed into native frozen soils. A new direct-driven installation method has been developed using a vibratory ram driven from a mast-mounted rack. The energy of the vibrating pile thaws the frozen ground surrounding the pile as it is driven to its design elevation. The installation is efficient and provides economic advantages over traditional installation methods. Twelve 12.75-inch-diameter steel pipe piles were installed in permafrost in the Alaskan arctic; eight piles were installed in ice-rich, sandy silt and four piles were installed in a frozen gravel soil. Piles were loaded in tension for six different durations ranging from five days to six months at loads varying from 35 kips to 145 kips. At the completion of long-term testing, the test piles were unloaded, rested, and then loaded to failure to characterize the adfreeze short-term strength. Data was collected continuously using electronic linear variable displacement transducers (LVDTs), load transducers, and thermistors. Data was analyzed to develop normalized long-term pile velocities and short-term strength as a function of loading stress and adfreeze temperature. Experimental results were statistically compared to current theoretical and empirical performance. It was found that vibratory-driven piles perform comparatively to traditional drill-and-slurry pile installations.
The Adfreeze Strength Characteristics of Vibratory Driven Piles
A field testing program was developed and performed for two years on Alaska's arctic North Slope. The objective of this testing program was to characterize the long- and short-term adfreeze performance of vibratory-driven piles installed into native frozen soils. A new direct-driven installation method has been developed using a vibratory ram driven from a mast-mounted rack. The energy of the vibrating pile thaws the frozen ground surrounding the pile as it is driven to its design elevation. The installation is efficient and provides economic advantages over traditional installation methods. Twelve 12.75-inch-diameter steel pipe piles were installed in permafrost in the Alaskan arctic; eight piles were installed in ice-rich, sandy silt and four piles were installed in a frozen gravel soil. Piles were loaded in tension for six different durations ranging from five days to six months at loads varying from 35 kips to 145 kips. At the completion of long-term testing, the test piles were unloaded, rested, and then loaded to failure to characterize the adfreeze short-term strength. Data was collected continuously using electronic linear variable displacement transducers (LVDTs), load transducers, and thermistors. Data was analyzed to develop normalized long-term pile velocities and short-term strength as a function of loading stress and adfreeze temperature. Experimental results were statistically compared to current theoretical and empirical performance. It was found that vibratory-driven piles perform comparatively to traditional drill-and-slurry pile installations.
The Adfreeze Strength Characteristics of Vibratory Driven Piles
Mayrberger, Torsten (author) / Braun, Kenton (author) / Scott, William N. (author) / Cologgi, John (author)
10th International Symposium on Cold Regions Development ; 2013 ; Anchorage, Alaska, United States
ISCORD 2013 ; 45-58
2013-06-04
Conference paper
Electronic Resource
English
Field and laboratory tests on adfreeze strength of ground to model concrete piles
| British Library Conference Proceedings | 1993
The strength and deformation behaviour of model adfreeze and grouted piles in saline frozen soils
| British Library Online Contents | 1993
| British Library Online Contents | 1995