Project Appreciation and Objectives
Sewerage Undertakers are under pressure to adopt geocellular SUD storage systems that are located in public open space. This has created a need for both design specifications and greater understanding of their long-term operation and maintenance.
These systems normally comprise buried modular plastic structures, which are stacked into the required volume. Concerns regarding their ongoing maintenance liability include:
- Deterioration in hydraulic performance e.g. from siltation within the storage; structure or clogging of media/perforated pipework feeding to and draining away from the structure;
- Structural integrity, particularly where the excavated material is mounded over the buried storage to avoid the cost of its disposal;
- Leak tightness;
- Vulnerability of the materials to rodents, chemicals, oils, etc.;
- Access to the structures for maintenance/repair operations.
This project will establish Sewerage Undertakers technical concerns; identify solutions, develop best practice guidance and prepare a draft Specification for design, installation, operation and maintenance.
Benefits to Clients
- Clearer understanding of the issues and implications relating to adoption of geocellular SUD storage systems.
- Access to a common technical specification for these assets.
- Better understanding of their operation and maintenance to inform business decisions.
- Identify issues and implications.
- Review current designs, types, specifications and case studies.
- Identify/develop criteria for structural and hydraulic design
- Review current UK trials
- Develop best practice guidance for operation and maintenance.
Develop a draft specification for design, installation, operation and maintenance.
- Report, to include best practice guidance
- Draft Specification
- Dissemination presentation/workshop for each participant.
Related WRc Work
- Sewerage Detention Tanks - A Design Guide, 1997.
- 10 year, ongoing, Portfolio programme of test development for sewerage rehabilitation
- Sewers for Adoption/Sewers for Scotland technical specifications, 2006
- Preparation and administration of Water Industry Specifications, ongoing.