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Micropile 

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Salas theory

The critical force Ncr for basic support conditions in the micropile head (determining micropile deflection) follows from:

where: EaIa - bending stiffness of micropile reinforcing tube
l - free length of micropile length
lef - length of fictitious fixed end
A - constat reflecting the type of support in micropile head

where: f - coefficient depending on the ratio of modulus of elasticity of soil in micropile head and base
le - elastic length of micropile given by:

where: EaIa - bending stiffness of micropile reinforcing tube
El - modulus of elasticiy of soil in the micropile base

Literature:

Jiménez Salas J.A. a kol:Geotecnica y Cimientos III, Capitulo 3, Rueda, Madrid (Spanish)




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