Analysis for Overconsolidated Cohesive Soils
Most cohesive soils in the original order except very young or organic clays are overconsolidated. If the final stress in the soil exceeds overconsolidation stress (σor+ σz > σp) than the settlement of the layered subsoil composites from cohesive soils is computed from following relation:
for: σor+ σz > σp
for: σor+ σz ≤ σp
where: | σor,i | - | vertical component of geostatic stress in the middle of ith layer |
σp,i | - | preconsolidation pressure in the ith layer | |
σz,i | - | vertical component of incremental stress (e.g. stress due to structure surcharge) inducing layer compression | |
mi | - | Janbu modulus in the ith layer | |
mr,i | - | Janbu modulus of recompression in the ith layer | |
hi | - | thickness of the ith layer |