Influence of Inclined Angles on Single Pile Vertical Capacity Based on Physical Model Test

Abstract

This study presents the influence of inclined angles on the vertical capacity of a single pile based on physical model tests laboratory. An own-customized stainless steel rod having smooth surfaces with a close-end characteristic was used as a model pile. It was installed with inclinations of 0, 5, 10, and 15˚ from the vertical. To model ground conditions, the dry and uniform sand was prepared with varying densifications of its 60%, 70%, and 80% relative densities (Dr). These relative densities were assumed to be the ground conditions after pile installation. Vertical loads were applied at the top of the test pile with measurement of vertical pile settlements. These applied vertical loads directly reflect pile capacity levels. The test results indicated that the tendency of vertical pile capacity values of an inclined pile was dependent on its inclined angles and ground density conditions. For the loose ground condition of 60% Dr, pile capacity values increase with an increase in inclined angles. Adversely, for the dense ground condition of 80% Dr, pile capacity values decrease with an increase in inclined angles. However, for the medium ground condition of 70% Dr, pile capacity values of an inclined pile have no clear trend. Furthermore, test results would indicate a denser ground condition, a better pile capacity for an inclined pile.