Laterally Loaded Pile (p-y curves)

General Tools

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b = m Pile Information & Layout N_y = m N_x = lateral load in X direction lateral load in Y direction S_x = S_y = m

Spreadsheet for Pile Group with Battered Pile Laterally Loaded Pile (p-y curves)mmy =

Relative Density of Sand	Loose	Medium	Dense
K_py for submerged sand (MN/m³)	5.4	16.3	34.0
K_py for sand above water(MN/m³)	6.8	24.4	61.0

Representative Values of K_py for Clays

Average Undrained Shear Strength (kPa)	50 - 100	200 - 300	300 - 400
K_py for static loading (MN/m³)	135	270	540
K_py for cyclic loading (MN/m³)	55	110	540

Pile Location I_y = I_x =

Static Cyclic Loading

Soil Information c = e ₅₀ = kPa g = kN/m³ K_py = MN/m³ m z =

You can get p-y curve (p - loading on one unit of pile length, y - lateral displacement) for the soil at the depth (z) from ground for one particular pile in one pile group,

For stiff clay with or without free water, undrained shear strength (c) should be the average undrained shear strength over the depth (z).

For pile group reduction factors, it is assumed that the loading on all piles are the same.

k_rm = a constant ranging from 0.00005 to 0.0005 for weak rocks.

The pile group reduction factor for the specified pile(f_m) is incorporated in the p-y curve.

The initial part of p-y curve: p = f_m.K_py.z.y

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

Review ReportRepresentative Values of K_py for SandsRepresentative Values of e₅₀ for Clays

Consistency of Clay	Undrained Shear Strength (kPa)	e₅₀
Very soft	>12	0.02
Soft	12-24	0.02
Medium	24-48	0.01
Stiff	48-96	0.006
Very Stiff	96-192	0.005
Hard	>192	0.004