Wellpoints for Holding Tank
Dewatering by wellpoints for the construction of a rainwater holding tank
Context
Project Type :
Dewatering
Location :
Saint-Vincent-de-Tyrosse (40)
Problem
- To build a rainwater holding tank under the extension of a building, the customer requested lowering the water table in the sandy ground with layers of clay.
- More appropriate for this type of soil, the dewatering by wellpoints technique will be used.
- Area to dewater: 2500 m²
Solution
- Lowering the water table with wellpoints
- Supervision of the customer and developer
- Technical monitoring of the progress of the project
- Management of authorisations under the law on water
- Height to lower: 1.15 m
- Hydraulic drilling mast for installation of the points
- Complete pumping installation:
- 3 piston pumps + 1 back-up generator
- 166 wellpoints and 240 linear metres of vacuum collector
- 200 metres of riser pipes + decantation vat
- Remote monitoring of pumping by flow meter, with on-call service and periodical maintenance visits
- Duration: 5 months
