ABSTRACT
CONTENTS 8.1 Introduction ....................................................................................................................... 327 8.2 Lateral Load Capacity Based on Strength .................................................................... 328
8.2.1 Ultimate Lateral Resistance of Piles .................................................................. 328 8.2.1.1 Piles in Homogeneous Cohesive Soils .............................................. 328 8.2.1.2 Piles in Cohesionless Soils .................................................................. 335
8.3 Lateral Load Capacity Based on Deflections ............................................................... 339 8.3.1 Linear Elastic Method .......................................................................................... 339
8.3.1.1 Free-Headed Piles................................................................................. 339 8.3.1.2 Fixed-Headed Piles............................................................................... 341
8.3.2 Nonlinear Methods............................................................................................... 343 8.3.2.1 Stiffness Matrix Analysis Method...................................................... 343 8.3.2.2 Lateral Pressure-Deflection (p-y) Method of Analysis .................. 348 8.3.2.3 Synthesis of p-y Curves Based on
Pile Instrumentation............................................................................. 350 8.4 Lateral Load Capacity of Pile Groups........................................................................... 355 8.5 Load and Resistance Factor Design for Laterally Loaded Piles ............................... 356 8.6 Effect of Pile Jetting on the Lateral Load Capacity..................................................... 356 8.7 Effect of Preaugering on the Lateral Load Capacity .................................................. 360 References ................................................................................................................................... 361
Single piles such as sign-posts and lamp-posts and pile groups that support bridge piers and offshore construction operations are constantly subjected to significant natural lateral loads (such as wind loads and wave actions) (Figure 8.1). Lateral loads can be also introduced on piles due to artificial causes like ship impacts. Therefore, the lateral load capacity is certainly a significant attribute in the design of piles under certain construction situations.
