Repairs to a collapsed sewer in Burleigh Street off The Strand in London have been completed following supply chain collaboration.
Cappagh worked with support specialist Mabey and consultant Malachy Walsh and Partners to develop the solution to access and repair the sewer 10.5m below street level, which caused flooding to nearby buildings when it collapsed late last year.
The shaft to access the damaged section was dug using a pole grab excavator for the first 7m and then extended to full depth by hand with Mabey’s Shaftbrace system being used to protect the work.
Cappagh operations manager Paul Ferncombe said: “Having worked with Mabey and MWP on several projects over the past few years, we drafted in their services feeling confident that they would be able to support this urgent and challenging excavation on a busy, utilities-heavy London street.
“Digging holes this depth must be approached with the utmost safety, which is why supporting the excavation with a reliable groundworks solution assured we could go as deep as possible.”
Mabey engineering director Dave Holland said: “Cappagh brought us into this project at an early stage, which meant that we could advise on the most cost effective and safe groundworks solution. With nearby buildings, including a hotel, at risk of damage, time was of the essence and, over the course of three weeks, we provided 10 levels of the strong Shaftbrace solution to enable the complex excavation to progress at a safe and efficient pace.”
Work on site has now been completed.