A) Mechanical One-Dimensional |
1) Changes in total vertical stress (overburden, glaciers, etc.)2) Changes in pore pressure (water table, seepage conditions, etc.) |
Uniform with constant s’p-s’v0 (except with seepage) |
B) Desiccation |
1) Drying due to evaporation vegetation, etc.2) Drying due to freezing |
Often highly erratic |
C) Drained Creep (Aging) |
1) Long-term secondary compression |
Uniform with constant s’p/s’v0 |
D) Physicochemical |
1) Natural cementation due to carbonates, silica, etc.2) Other causes of bonding due to ion exchange, thixotropy, “weathering,” etc. |
Not uniform |