Pile Lateral Resistance

Pile foundations are subjected to horizontal loads due to wind, traffic loads, bridge curvature, and vessel or traffic impact. Evaluate the nominal resistance of pile foundation to horizontal loads based on both subsurface strata and structural properties.
Refer to AASHTO LRFD Bridge Design Specifications Article 10.7.2.4 for detailed requirements regarding determination of lateral resistance. Use a minimum spacing of 3 pile diameters (3D) to the extent possible. Should closer spacing be required due to geometric constraints, the following P
m
 values may be used at spacing 3D to 2D in accordance with Article 10.7.2.4:
  • For Row 1, P
    m
     = 0.45
  • For Row 2, P
    m
     = 0.33
  • For Row 3 and higher, P
    m
     = 0.25