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Modulus of Subsoil Reaction According to Menard

Based on the results from experimental measurements (pressiometer) of soil response loaded by rigid slab Menard derived the following expression for modulus of subsoil reaction:

where:

EM

-

pressiometric (Menard) modulus, if necessary it can be substituted by oedometric modulus of soil [MPa]

a

-

characteristic length depending on a depth of fixed-end structure, according to Menard assumed at a depth of 2/3 of length of fixed-end structure below final depth of sheeted ditch [m]

α

-

rheological coefficient of soil [-]

Approximate values of rheological coefficient of soil α

Clay

Silt

Sand

Gravel

Overconsolidated

1

2/3

1/2

1/3

Normally consolidated

2/3

1/2

1/3

1/4

Non-consolidated

1/2

1/2

1/3

1/4

Literature:

Menard, L. (1975): "The Menard Pressuremeter: Interpretation and Application of the Pressuremeter Test Results to Foundations Design", Sols-Soils, No. 26, Paris, France.