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Multipliers


The Multipliers tab is used to define the following modification factors:

  • p-y multipliers
  • t-z multipliers
  • Q-z multipliers

P-Y MULTIPLIERS

p-y multipliers are used to account for pile groups, battered piles, scale effects, installation effects, error adjustment, and more.

  • p- multipliers are usually <= 1
  • y- multipliers are usually = 1

p-y multiplier profiles can be created, edited, and deleted in the Edit p-y Multipliers dialog, accessed by clicking on the Pencil icon icon. Profiles are assigned to a pile by selecting it from the drop down.

NOTE: When using p-y multipliers with Slide, ensure you extend the region of application in RSPile to a depth as long or longer than the longest pile you will create in Slide. Keep in mind that pile spacing is taken into account when defining a Slide model.

T-Z AND Q-Z MULTIPLIERS

t-z and Q-z factors are typically used to match empirical data when there are test conditions, such as energy loss, that the conventional soil models do not consider.

  • t- multipliers are multiples applied to the unit skin friction at each depth
  • Q- multipliers are multiples for the end bearing resistance at the pile toe
  • z- multipliers are multiples applied to the soil displacements for each point on the t-z or Q-z curve

t-z multiplier profiles can be created, edited, and deleted in the Edit t-z Multipliers dialog, accessed by clicking on the Pencil icon icon. Profiles are assigned to a pile by selecting it from the drop down.

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