Ross on Wye
The project involved the construction of an 8m internal diameter (ID) storage tank in Ross on Wye, Herefordshire, UK, to increase the wastewater storage capacity of the existing sewerage system.
The work was commissioned by Welsh Water and Morgan Sindall was appointed as the main contractor.
Rorcon was selected as a subcontractor to carry out the construction of the storage tank, which involved sinking the caisson through challenging ground conditions. A caisson is a watertight structure used for various purposes, including as a foundation for a bridge pier or a building, or as a shaft for tunnel construction.
The construction of the storage tank was carried out using a caisson method, which involved sinking a pre-fabricated segments, forming rings through the ground to the required depth.
The caisson was then connected to a temporary working chamber, and excavation works commenced inside the chamber.
The excavation was carried out using a combination of hand excavation and mechanical excavation techniques.
One of the major challenges encountered during the construction was the difficult ground conditions, which included hard rock and boulder formations. The team had to use specialized drilling and excavation equipment to break through the rock and boulder formations, which added to the complexity and duration of the project.
Despite the challenges encountered, Rorcon successfully completed the construction of the storage tank within the scheduled timeframe and to the satisfaction of Welsh Water and Morgan Sindall.
The new storage tank will help to reduce the risk of flooding and improve the overall performance of the wastewater system in Ross on Wye.
