📣 Exciting news! The first tunnel has been completed with the help of the fantastic Connect 6ix team and a micro-tunnel Boring Machine! This micro-tunnel will help protect the area for many years. Learn more here 👇 #nge #Ontarioline #connect6ix #microtunnel #mTBM
Our first Ontario Line tunnel is now complete! Using a micro-Tunnel Boring Machine (mTBM), the Connect 6ix team dug a new tunnel underneath the CP tracks near the Leaside Business Park in Thorncliffe Park to replace a nearly century-old culvert. That culvert has been doing the job in the area, flowing water into Walmsley Brook, but is at the end of its functional life. The new culvert will help protect the site from the next century of rain and storms. Here’s the work, by the numbers: Depth of tunnel: up to 15 metres below ground level Length of new tunnel being built for the culvert: 94 metres Length of each section of tunnel: 3 metres Diameter of each section of tunnel: 1.5 metres Weight of each section of tunnel: 7100 kg Trains passing over the construction work: 6-8 per day Number of monitoring instruments installed to track any movement of the CP tracks above the tunnelling work: 88 Amount of movement shown on the CP tracks: 0 mm Length of mTBM machine: 5 metres The team constructed a launch shaft, lowered the mTBM into it, and started the tunnel excavation. As the mTBM advanced, three-metre concrete pipe segments were lowered into place by a crane and pushed into position in the tunnel by hydraulic jacks. The pipes were joined by rubber gaskets and the compression of the pipe jacking, extending the culvert pipe the full 94-metre length to the extraction shaft, where the mTBM was removed. This trenchless method minimizes surface disruption, making it ideal for tunnelling below the rail corridor. A great piece of engineering to make the Ontario Line ready for the future. NGE Canada Hitachi Rail Plenary Americas Transdev Webuild #OntarioLine
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