Dextra Group | Reliable Connections

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Cut-able solutions
Cutable support is mostly used in the longitudinal direction of the tunnel (portal, face) when temporary stabilization is required before moving to the next phase.
Also, Mechanized Tunneling is becoming standard in urban areas, especially for underground metro projects. This modern technique is calling for new kinds of systems, in particular, cut-able reinforcement bars for concrete structures (like Soft-Eyes in D-walls) and cut-able ground anchors.


Radial & lateral support (Roof & Wall)
When building a tunnel by drill & blast or conventional mining, the roof and walls need to be supported.
Rock bolts are the first type of support installed before any other kind of mesh or lining is applied. Depending on the construction sequence and technology, both temporary and permanent bolts can be offered.


Group (45)

Cuttable Glass Fiber Reinforced Polymer (GFRP) reinforcement

Frame (3)

Speed up the construction schedules

Group (46)

No demolition equipment needed

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Safety and reliable design

Why use Dextra Tunneling Solutions?

Without Soft-Eye

To create tunnel openings, the concrete and steel structures reinforcing the D-Wall must be extracted at the entry/exit points. This task is tedious and requires the mobilization of additional heavy equipment. There is also a high risk of damaging the Tunnel Boring Machine (TBM). In a humid soil environment, opening the D-Wall before the TBM’s arrival may lead to complications.

With Soft-Eye

The Tunnel Boring Machine (TBM) effortlessly breaks through the station’s D-Wall by cutting the FRP reinforcement and crushing the concrete. The design of the Soft-Eye allows for precise control of the margin of error. This method stands as the fastest, simplest, and safest way to create tunnel openings.

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