What is an embankment slope (talud)?
An embankment slope, called a talud in Dutch, is an inclined face of soil or other material, such as the side of a dike, ditch, road embankment or excavation. Its steepness is the slope gradient, usually written as a ratio of height to horizontal distance: a 1:2 slope rises 1 metre over 2 metres horizontally.
Application
- Excavations and trenches: instead of sheet piling or shoring, the soil is battered back at a safe angle.
- Dikes and quays: the inner and outer slopes together with the crest form the dike profile.
- Ditches and ponds: a gentle slope collapses less easily and is safer for people and animals.
- Roads and railways: embankments and cuttings have slopes on both sides.
How steep can a slope be?
The safe gradient depends on soil type, groundwater, loads near the edge and how long the slope stays open. Every soil has a natural slope (angle of repose): the steepest angle at which loose soil just stays in place. A designed slope stays well below this.
Practical tips:
- When in doubt, or for deep excavations, have the gradient determined by a structural or geotechnical engineer.
- Do not place spoil, materials or machinery right at the top edge; it increases the risk of slipping.
- Water is the main enemy: rain and seepage can make a slope unstable quickly. Provide drainage and protect the surface (grass, sheeting, stone revetment).
- Along water, toe protection (rock armour) stops the foot of the slope from being scoured out.
Related terms
- Natural slope
- Slope
- Emergency dike
- Stone dike
- Dike monitoring
Want to learn more about construction terms? Visit our knowledge base at fredsdiyplans.com.