The Outcome
A reinforced concrete channel, with the purpose of transporting diluted foul and surface water to the crest of the tank slope, was designed. The Cavern very rarely (typically less than once a year) fills to maximum water level.
How we did it
The reinforced concrete channel is designed as a slab supported by two deep beams to enhance rigidity. This shape minimises torsion and vibration caused by flow velocity. It is supported by reinforced concrete circular columns, with one wall anchored to the main structure, providing added robustness given the slender design of the columns. New baffles have been installed to evenly distribute sewage and surface water inflows from the new inlet channel across the Main Pump Sump.
The Challenge
The construction faced several challenges, primarily due to site constraints. However, through teamwork and collaboration with the contractor, all issues were effectively resolved.
