Extreme containment engineering
Introduction
Screens are a type of flexible earth containment structure, commonly used in civil engineering constructions.
Screen Properties
• - They are placed or executed prior to excavation.
• - They reach a depth that is greater than that of the excavation. This implies that the ground in the excavated part works passively.
• - Both the constituent elements and the "Joint (construction)" joints are waterproof. Therefore, they allow excavations to be carried out below the water table with guarantees, although the water will have to be pumped to avoid possible leaks. It may be interesting to deepen the screen, to reduce the flow to be pumped, or avoid siphoning problems"), or drag. With this, the filtration path will be longer, the gradient will be reduced, the flow rates will be lower, and the possibility of siphoning, therefore, will also be reduced.
• - They withstand bending efforts very well. Even so, there may be a need to resort to intermediate supports:
- Due to excess flexibility.
- Because the movements that occur are excessive.
Types of screens
• - Sheet piles or Metal prefabricated element screens (sheet-pile in English).
• - Prefabricated concrete panel screens.
• - Diaphragm walls or "in situ" concrete screens (diaphragm walls or slurry walls in English).
• - Pile screens.
• - Walls made by bataches").
Screen support elements
Contenido
Dado que las pantallas son estructuras flexibles, en ocasiones puede resultar necesario aplicar elementos de soporte de muy diverso tipo.