Design of Piles for Negative Friction

摘要

The paper summarizes and assesses some of the proposed methods for pilefoundation design to withstand negative friction. A load transfer analysis is used to evaluate the performance of a pile at different working loads, when negative friction is developed along the pile. It is demonstrated that negative friction itself will not cause geotechnical failure of the pile, but may cause excessive movement of the pile if the working load is too large. Thus the design of a pile subjected to negative friction is generally governed by settlement, rather than ultimate load, considerations. The influence of other factors such as pile length and coating of the pile are also considered.