3D EAU product
Network storage solutions based on the use of self-operated tilting gate systems
Issues
Prevent sewage discharges while ensuring the optimal performance of collective sanitation
How can sewage discharges be prevented in a cost-efficient manner ?
Comment optimiser le stockage et la gestion des eaux pluviales ?
CSO monitoring and spill reduction
Proposed solutions
The storage valve in a storm overflow weir
- Storage during normal rainfall
- Maintain drainage capacity for heavy rains
This valve is fitted with a check valve to prevent backflow from the natural environment.
Dry weather
Valve closed
No impact on the network
Running rain
Valve closed
Storage in network
Heavy rain
Valve open
Limited impact on the network
The storage and control valve in the network
- Store in upstream collector
- Maintain drainage capacity for heavy rainfall
Dry weather
Valve closed
No impact on the network
Running rain
Valve in regulation mode
Storage in network
Heavy rain
Valve open
Limited impact on the network
Case studies from on-site applications
An overflow gate
Fusible gate
Methodology
- Creation of a 1D model of the network. A feasibility study is carried out to take into account the actual environment of the structure and to characterize the hydraulic behavior of the future valve. The 1D model is used to validate the relevance and feasibility of the solution.
- Validation by 3D modeling if required. 3D modeling can be used in cases where the structure is non-standard, to check the impact of the gates on the network.
Design, manufacture and installation
Valves are designed and manufactured in our workshops in France. They are then tested on a test bench and delivered to site. The valves are lowered through the existing manhole and installed in the network.
Benefits
Cheaper alternative to creating a storage basin
Fully mechanical system requiring no electricity
Can be integrated into a hydraulic network model
Instrumental device for self-monitoring
Anti-return function in the event of downstream influence on the receiving environment