Modulus of Subsoil Reaction According to CSN 73 1004
The modulus of subsoil reaction for cohesive soil assumes the form:
where: | Edef | - | deformation modulus of soil [MPa] |
d | - | pile diameter [m] |
For cohesionless soil, it is given by:
where: | nh | - | modulus of horizontal compressibility [MN/m3] |
d | - | pile diameter [m] | |
z | depth of a given section from original grade [m] |
Approximate values of modulus of horizontal compressibility nh for cohesionless soils:
Soil | nh [MN/m3] | ||
Relative density of soil ID [-] | 0.33 | 0.5 | 0.9 |
Dry sand and gravel Wet sand and gravel | 1.5 2.5 | 7.0 4.5 | 18.0 11.0 |
Literature:
CSN 73 1004: Velkoprumerove piloty. Praha, UNM, 1981, 56 p.
Masopust, J.: Vrtane piloty. 1st edition, Prague, Cenek a Jezek, 1994, 263 p.