Geotechnical and Foundation Engineering: Design and Construction

The following notation is used in this chapter:
| SYMBOL | DEFINITION |
| a, ? x | Width of a slice | |
| c | Cohesion based on a total stress analysis | |
| c ? | Cohesion based on an effective stress analysis | |
| d, D | Depth of the slip surface | |
| F | Factor of safety for slope stability | |
| h | Depth below the ground surface (for calculation of r u) | |
| L | Length of the slip surface | |
| N | Normal force on the slip surface | |
| N ? | Effective normal force on the slip surface | |
| r u | Pore water pressure ratio | |
| T | Shear force along the slip surface | |
| u | Pore water pressure | |
| U | Pore water force acting on the slip surface | |
| W | Total weight of the failure wedge or failure slice | |
| ? | Slope inclination | |
| ? | Angular distortion as defined by Boscardin and Cording (1989) | |
| ? h | Horizontal strain of the foundation | |
| ? | Friction angle based on a total stress analysis | |
| ?? | Friction angle based on an effective stress analysis | |
| ? b | Buoyant unit weight of saturated soil below the groundwater table | |
| ? t | Wet unit weight of soil | |
| ? w | Unit weight of water | |
| ?? n | Effective normal stress on the slip surface | |
| ? | Shear stress along the slip surface | |
| ? | Shear strength of the soil |
Slope movement can be divided into six basic categories, as described below:
Rockfalls...