Lateral Limit Load

Lateral bearing capacity is calculated using method A proposed by Tomlinson (1971) according to the following:

Al = Lateral pile surface

fw = Correction factor connected to the conic form of the pile. i.e. the percentage diminution of the pile diameter.

c = Average cohesion value (or shear resistance in undrained conditions).

s = Effective vertical pressure of the terrain.

K= Coefficient of horizontal thrust. This depends on the technique of the pile and on the previous compaction state and is calculated as :

• For driven piles

or may be selected, in concrete cases, from the following table:

Palo		K values
	Loose Soils		Dense Soils
Steel	0.5		1
Prescast. Concrete	1		2
Wood	1		3

• For drilled piles

δ = Friction between pile and soil. A function of the roughness of the pile surface:

• For driven piles

• For drilled piles

α = Adhesion coefficient obtained from the following guidelines

• For drilled piles
• Caquot – Kerisel

• Meyerhof – Murdock (1963)

• Whitaker – Cooke (1966)

• Woodward (1961)

• For driven piles

2.5 ≤ c < 5 t/m2	α = 1.00
5 ≤ c < 10	α = 0.70
10 ≤ c < 15	α = 0.50
15 ≤ c < 20	α = 0.40
c ≥ 20	α = 0.30

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