The Comparison of Pile Bearing Capacity using 8 Direct Method based on CPT data in Surabaya Area

Abstract

This research focuses on comparing the pile bearing capacity resulting from eight different methods that have been developed and are widely used in design. The methods used are the Schmertmann (1978), LCPC (Bustamante & Gianeselli 1982 – Laboratoire Central des Ponts et Chausees), De Ruiter and Beringen (1979), Tumay and Fakhroo (1982), Price and Wardle (1982), Philipponnat (1980), Aoki and De Alencar (1975), and the Penpile methods (Clisby et al 1978). CPT data is used in this study because it is considered easier, faster and fast and relatively economical, and supplies continuous records with depth. Twenty different CPT data variations in the Surabaya area were used in this study. The piles used in this study are concrete piles with a diameter of 60 cm. The result of this research is that the bearing capacity using the Schmertmann method tends to be greater when compared to other methods while the Penpile method produces the lowest carrying capacity. The ratio of the minimum and maximum carrying capacity of the 8 methods used is up to 20%.