Proceedings of the 30th Annual Conference on Deep Foundations, 2005, Chicago, Illinois, USA, (DFI)
Micro-Pile Foundations in Difficult Subsurface Conditions
Ravi P. Malviya P.E., Christopher M. Reith P.E., D. Dreher Whetstone P.E., Paul M. Blakita
Micro-piles are small diameter (5 to 10 inches), cast-in-place piles which can develop high load capacities by bonding with soil or rock. Micro-piles are particularly well-suited for moderate to heavily loaded structures requiring deep foundations in difficult subsurface conditions, such as karst, bouldery mine spoil, or unsuitable fills with concrete debris or other obstructions. Attempts to install conventional deep foundations including driven piles, drilled piers, or auger-cast piles are likely to be fraught with construction difficulties and disputes, delays, cost overruns, and may be infeasible in some cases. Micro-pile installation equipment is very effective in installing foundations through such overburden or rock materials. This paper presents case histories of Micro-pile installations on two projects with difficult soil/rock materials. The project sites are located in Charles Town, West Virginia and Masontown, Pennsylvania.
|article #249; publication #72 (AM-2005)|