A Canadian municipality has released a video of country’s largest diameter microtunnel boring machine (MTBM) installation.
To support population growth in the region, municipality Metro Vancouver has been constructing the South Surrey Interceptor.
The project involved the installation of a second sewer near the existing pipe, which collects sewage from South Surrey and Langley, and conveys it to the Annacis Island Wastewater Treatment Plant.
When the Herrenknecht MTBM was launched, Metro Vancouver Senior Project Engineer Mike Jokic said the project to twin the tunnels was unique.
“This project is unique because it’s the largest diameter pipe installed via microtunnel,” he said.
“It’s the largest in Canada and, as far as we know, the largest in North America for this methodology of tunnelling.”
The MTBM is installing 3 m inside diameter reinforced concrete pipe segments, with a high-density polyethylene lining.
Mr Jokic said the use of microtunnelling was essential in the built up area, particularly with the eastern microtunnel running below three business parks and two roads, one of which was a major road covering multiple underground utility assets.
The first phase of microtunnelling, the west section, has been taking place since June 2018, while the second phase, the east section, commenced in January 2019.
Both microtunnelling phases are scheduled for completion in June 2019, while the South Surrey Interceptor is scheduled for completion in 2022.
For more information visit the Metro Vancouver website.
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