Table 1.
Engineering–geological classification adopted in SM studies by following Italian standards21.
| eg-units | Cover terrain group | eg-units | Cover terrain group |
|---|---|---|---|
| RI | Terrains containing remains of human activity, anthropic deposits | LP | Lapideous rock |
| GW | Well sorted gravels, mixed gravels and sands | GR | Grainy cemented rock |
| GP | Non sorted gravels, mixed gravels and sands | CO | Cohesive over-consolidated rock |
| GM | Silty gravels, mixed gravels, sands and silts | AL | Alternations of lithotypes |
| GC | Clayey gravels, mixed gravels, sands and clays | LPS | Stratified LP |
| SW | Well sorted sands, mixed sands and gravels | GRS | Stratified GR |
| SP | Poorly sorted sands | COS | Stratified CO |
| SM | Silty sands, mixed sands and silts | ALS | Stratified AL |
| SC | Clayey sands, mixed sands and clays | SFLP | Fractured/weathered LP |
| OL | Organic silts, low plasticity organic silty-clays | SFGR | Fractured/weathered GR |
| OH | Middle plasticity organic clays, organic silts | SFCO | Fractured/weathered CO |
| MH | Inorganic silts, fine sands, diatomic silts | SFAL | Fractured/weathered AL |
| ML | Inorganic silts, fine silty-clayey sands, low plasticity clayey, silts | SFLPS | Fractured/weathered LPS |
| CL | Middle-low plasticity inorganic clays, gravel-sandy clays, silty clays | SFGRS | Fractured/weathered GRS |
| CH | High plasticity inorganic clays | SFCOS | Fractured/weathered COS |
| PT | Peat and organic soils | SFALS | Fractured/weathered ALS |