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Layer i Li
(mm)		 Soil Type g
(kN/m3)		 c
(kPa)		 e50 f Sand Density NP
1 500 Stiff clay WITHOUT free water 19 50 0.007 - - 1
2 500 Stiff clay WITHOUT free water 20 75 0.007 - - 1
3 1500 Stiff clay WITHOUT free water 20 100 0.006 - - 3
4 2500 Stiff clay WITHOUT free water 20 165 0.005 - - 5
5 5000 Stiff clay in free water 11.2 165 0.005 - - 10
Layer i Li
(mm)		 Soil Type g
(kN/m3)		 c
(kPa)		 e50 f Sand Density NP
1 500 Stiff clay WITHOUT free water 19 50 0.007 - - 1
2 500 Stiff clay WITHOUT free water 20 75 0.007 - - 1
3 1500 Stiff clay WITHOUT free water 20 100 0.006 - - 3
4 2500 Stiff clay WITHOUT free water 20 165 0.005 - - 5
5 5000 Stiff clay in free water 11.2 165 0.005 - - 10
Layer i Li
(mm)		 Soil Type g
(kN/m3)		 c
(kPa)		 e50 f Sand Density NP
1 500 Stiff clay WITHOUT free water 19 50 0.007 - - 1
2 500 Stiff clay WITHOUT free water 20 75 0.007 - - 1
3 1500 Stiff clay WITHOUT free water 20 100 0.006 - - 3
4 2500 Stiff clay WITHOUT free water 20 165 0.005 - - 5
5 5000 Stiff clay in free water 11.2 165 0.005 - - 10
Nonlinear Spring for Lateral Loaded Pile
General Information b = m mm y =
Consistency of Clay Undrained Shear Strength (kPa) e50
Very soft>120.02
Soft12-240.02
Medium24-480.01
Stiff48-960.006
Very Stiff96-1920.005
Hard>1920.004
Representative Values of e50 for Clays

From p-y curve,you can get the spring of loading versus displacement, then, apply this as lateral nonlinear spring support on members in SFRAME, STAAD Pro, or SAP2000, eventually, get results similar to LPILE


Reference:
Reese L. C., Isenhower W. M., Wang S. T. Analysis and Design of Shallow and Deep Foundations, John Wiley & Sons, Inc.

Li = mm i = gi = kPa Layers of Soil ci = e50i = NPi = Type kN/m3
NonLinear Spring for Lateral Loaded Pile (p-y curves)Review Report