INTERPRETATION OF PILE ACCEPTANCE CRITERIA FROM DEFICIENT DATA

The Indian Standard, IS:2911 (Part 4) and the Australian Standard, AS 2159-1995, specify the acceptance criteria for piles tested in compres sion. These criteria can be applied only if the settlement of the pile is large (10% of the pile diameter in the case of the Indian Standard and 50 mm in the case of the Australian Standard). When the load-sett lement data are deficient, it is desirable to make a reasonably good e stimate of the loads corresponding to each criterion by a proper inter pretation of the available data. The objective of the present study is to develop procedures that can be used for this purpose. The study sh ows that, for piles transmitting >65% of their load through skin frict ion, the loads corresponding to each criterion of the Australian and I ndian Standards and the load-settlement curve can be predicted reasona bly well by using the hyperbolic method and the modified hyperbolic me thod, if the load-settlement data are available up to a minimum settle ment of 5% of the pile diameter.