Devcorp Limited
Silverstream Kiwirail Pipe Ram
This was a complex Pipe Ram in wet sandy conditions under the Kiwirail Corridor and adjacent to the Kaiapoi River stop bank for stormwater removal at the expanded Silverstream development.
As subcontractor to Devcorp Limited, we installed 24 metres of 711mm steel casing underneath the Kiwirail corridor on grade without affecting train traffic or the integrity of the rail line.
At our recommendation, a two-pot epoxy coating was applied the internal surface of the steel casing so the steel casing could be used as the storm water conduit rather than having to sleeve an additional pipeline through the casing. This was signed off and approved by the Waimakariri District Council in the design stage as this was the first time this method had been used in the district.
This innovation allowed the project to continue, on time and below budget as at the time there were significant supply chain issues caused by the Covid 19 global pandemic which meant the materials required to deliver the original design would not be available in New Zealand for an undetermined timeframe.
This was a very complex pipe ram installation due to the critical nature of the grade required given it was for gravity stormwater in wet sandy conditions. Because the steel casing was being rammed under the critical rail corridor infrastructure, this required a lot more attention to detail and process to ensure all of the stakeholders were aware of and able to approve our methods prior to construction.
- Scale: $150,000
- Commenced and Completed: July 2021