Deep and extensive excavations and city tunnels are becoming increasingly important in intra-urban areas

All non-mined tunnels need extensive excavations. DYWIDAG's geotechnical systems, like ground anchors, provide sufficient stability during the entire excavation life-cycle.  For wall-to-ceiling connections, reinforcing systems like DYWIDAG's rebar connector aid construction progress, while post-tensioning supports the construction of large span ceilings.

Secure and stable

Bar anchors, soil nails, and rock bolts secure slurry walls at tunnel entrances and stabilize rock faces and vaults in the main and access tunnels. Post-tensioning tendons support the construction of immersed tunnels—and the formation of wide ceilings in tunnels with high applying loads.

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Threadbars™ and strand anchors stabilize cut-and-cover bridge construction

The use of DYWIDAG Threadbars™ and strand anchors stabilize excavation sites for cut and cover bridge construction projects—and provide unobstructed work zones.

Post-tensioning supports the transport and construction of immersed tunnels

Separate segments of immersed tunnels are manufactured in a dry dock, shipped into position, filled with water—and sunk. 

Post-tensioning enables the transport of the segments to the site—and, once the tunnel is in place, transfers the water pressure to the structural walls.

Visual inspection devices scan inner shell tunnels—Infrastructure Intelligence reports results

DYWIDAG's visual inspection devices can automatically scan the inner shell of a tunnel and visualize the results in Infrastructure Intelligence.