Plugging a 5.5 m Sewage Tunnel at 35 m Water Depth: 3 Months, No Failure

Reliance Trenchless Technology · English · Oct 23, 2026

A steel-lined high-pressure plug sealed Abu Dhabi's 5.5 m STEP tunnel at 35 m water depth and held for three months while the pumping station was repaired.

The 5.5 m diameter, 35 m water depth, 0.45 MPa rating and three-month duration refer to this 2024 project. The storm and in-tunnel shots are 3D illustrations; confirm the specification for each project.