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What is Pipe Roof Installation for Tunnel Safety about?

The document provides technical specifications for installing a pipe roof support system during tunnel excavation at a weak, unstable rock formation. Key details include: (1) Perforated steel pipes will be inserted into drilled holes at the tunnel crown to form a fan shape for stabilization; (2) Pipes will be installed in zigzag patterns of 14-15 pipes per row, with holes drilled every 486mm; (3) Cement grout will be injected through the pipes using double piston equipment at 2-3 bars of pressure.

Author

Ivan Windiara

Language

EN