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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

-

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

a

-

characteristic length depending on a depth of the fixed-end structure, according to Menard. The assumed depth of 2/3 of length of a fixed-end structure below the final depth of the sheeted ditch

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.

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