Soil Section page

Used to define the number of soil layers in the range of the pier and to provide geotechnical data for each layer.

Setting	Description
soil layers list	A list of pile sections available.
Add Layer Above / Below	Click either to add a new soil layer above or below the currently selected soil layer in the list.
Delete Layer	Click to remove the selected soil layer from the list.
Layer Type	Select the soil type that best describes the layer.
Layer Depth	Type a thickness for the soil layer, in the selected units.

Setting	Description
P Multiplier	Scale factor for P values in p-y curve.
Y Mulitplier	Scale factor for Y values in p-y curve.

Setting	Description
< Previous	Steps the Wizard to the previous step.
Next >	Proceeds the Wizard to the next step.
Cancel	Exits the Wizard without creating a new Drilled/Driven Pier job..

Soil Properties

Setting

Description

Soil Density

Average soil density for the soil layer.

Note: If the water table is located within a soil layer, soil layer should be split into two parts with different soil densities.

Epsilon 50

Soil strain which corresponds to 50% of the maximum principle stress. Some typical values for ε₅₀—taken from EI 02C097—are shown in the following table.

Table 1. Representative values of ε50
Consistency of Clay	Avg. Undrained Shear Strength (ksf)	ε₅₀
Soft	-	0.020
Medium	-	0.010
Stiff	1-2	0007
2-4	0.005
4-8	0.004

Cohesion

Undrained shear strength of a cohesive soil.

J Parameter

An empirical, dimensionless parameter. A value of 0.5 is frequently used (soft clay). A value of 0.25 can be used for a medium clay.

Initial Soil Stiffness

Slope, k, to use for the initial, straight-line portion of the p-y curve representing static, linear loading. Some typical values for k—taken from EI 02C097—are shown in the following table.

Table 2. Representative values of k for stiff clays
Avg. Undrained Shear Strength (ksf)	k_s (lb/in.³)	k_c (lb/in.³)
1-2	500	200
2-4	1,000	400
4-8	2,000	800