J4-K2 Tunnel Connection
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J4-K2 Tunnel Connection project, completed in 2012 for the Tehran and Suburban Railway Company.
This project involved creating a 2-to-1 T-way and connecting tunnel from Line 4 to Line 2, along with inter-tunnel ventilation for the Tehran Metro.
A major challenge we overcame was ensuring efficient ventilation and structural stability while linking the two metro lines.
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