Experiments in Expandable Tip Piling

by Thomas L. Adams, (M.ASCE), Exec. Vice Pres.; Charles M. Upham Int., Consulting Engrs., Bangkok, Thailand,
Fred C. Stepanich, (M.ASCE), Consulting Engr.; Kuala Lumpur, Malaysia,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1973, Vol. 99, Issue 11, Pg. 957-977

Document Type: Journal Paper


Significant economic savings can be realized if pile design loads can be increased to those of which the pile itself is capable of sustaining as a structural column. In friction pile conditions or uplift conditions a system is described whereby pile capacities are increased by expanding the pile cross section by extruding steel plates from the pile body after the pile is driven. Results of a laboratory model test and reduced scale prototype test are given and compared with a theoretical preliminary design procedure. A design example illustrates potential economy. An examination of the scheme's adaptability to various pile sections already in commercial use throughout the world emphasizes the versatility of the system.

Subject Headings: Steel piles | Driven piles | Steel plates | Laboratory tests | Economic factors | Sustainable development | Load factors | Columns

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