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Modulus of subsoil reaction after Matlock and Rees

This method is applicable for cohesionless soils. The modulus of subsoil reaction then follows from the expression:

where: nh - modulus of horizontal compressibility
z depth of a given section from finished grade
Soil nh  [MN/m3]
Dry sand and gravel
- loose
- medium dense
- dense
1,8 – 2,2
5,5 – 7,0
15,0 - 18,0
Wet sand and gravel
- loose
- medium dense
- dense
1,0 – 1,4
3,5 – 4,5
9,0 - 12,0

Possible values of modulus nh  for cohesionless soils




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