V&A Waterfront New Emergency Storage Overflow Tank and Rising Main Rehabilitation
V&A Waterfront New Emergency Storage Overflow Tank and Rising Main Rehabilitation
The V&A Waterfront wished to provide redundancy in the main sewage pump station by installing an emergency overflow tank serving the main sewer pump station and providing pipe reinforcement for the existing rising main to improve the life span of the pipeline.
Client: Victoria & Alfred (Pty) Ltd
Contract value: R 5.2 Million
Duration: 12 months
Completed: Oct 2013
Engineer: Royal HaskoningDHV
Overview of the Project
The V&A Waterfront wished to provide redundancy in the main sewage pump station by installing an emergency overflow tank serving the main sewer pump station and providing pipe reinforcement for the existing rising main to improve the life span of the pipeline.
Scope of Work
The work included:
⦁ Design and provision of formwork
⦁ Construction of 8.6m x 20.6m reinforced concrete tank and 400mm thick reinforced concrete roof slab
⦁ Reinforcement of rising main
⦁ Interconnecting pipework
⦁ Odour control system
Challenges & Successes
The waterfront, being predominantly old reclaimed land, has varying soil types and groundwater seepage is a common issue for constructors in this area of Cape Town and collapse of the excavation was a concern. We overcame this challenge by constantly dewatering and shoring the open excavations.
The overflow tank was completed on time and the interlocking paving reinstated over the tank roof slab with no change in levels from the pre-construction situation.
