Grondwater at the right level (capitalized)
For temporary lowering of the groundwater level, vertical filtering is a proven method. Depending on local soil conditions and the required drawdown target, we select the appropriate filter system.
Our four filter systems:
- Vacuum flush filter
- Gravity filter
- OTO filter
- Flash filter
Our systems
Vacuum flushing filter
This filter system is often used in sandy soils. The filters have a length of 3 to 8 m and are mainly used for excavation pits with an excavation depth of up to 4 m.
Gravity filters
They are mainly used in sandy soils. The filters have a length of 8 to 9 m. The groundwater flows by gravity to the coco-sheathed filters and is conveyed to the discharge point by vacuum piston pumps.
OTO filters
These filters are used for cohesive soils. The OTO filter consists of a flexible suction tube up to 8 m long and a nylon filter up to 2 m long. The OTO filters are installed down to the accumulating layer in the soil.
Relaxation filter
This type of filter is used in projects where the groundwater is under tension beneath a cohesive layer. The pressure in the groundwater zone must be reduced to prevent hydraulic fracturing in the excavation. Groundwater stress relief often occurs in areas with clay and peat deposits.
