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Tunneling and Mining – old

Tunneling and Mining

ASTEC FRP Combination Bolt is a unique and innovative GFRP solution precisely designed by Dextra.

Specific tunneling application of GFRP rebar cage allowing a TBM to break through a reinforcement cage in a minimum time.

Steel rock bolt solution expanded by high pressure water. Ideal for irregular bore holes.

GEOTEC lattice girder systems are lightweight, three-dimensional curved steel frames which are composed of main bars, secondary bars, connection plates, foot plates and stiffeners.

GEOTEC umbrella pipe system is a pre-support in soft and weak ground conditions. The system comprises steel pipes installed from the tunnel face to form a roof to stabilize the tunnel headings.

GEOTEC Steel Combination Bolt provides immediate support by the use of an expansion shell, to be fully grouted at a later stage allowing it to be classified as permanent application.

Solid rockbolt made of composite material. Recommended for face bolting.

3 in 1 concept: Self-Drilling Rock Bolt acts as a drilling rod, as well as an anchor bar and a grouting pipe.

Cuttable FRP hollow rock bolt acting as a grouting pipe. Ideal for face bolting.


At every moment of your customer journey, Dextra teams dedicate themselves to the production of smart construction solutions that allow our customers to reach higher productivity and safety levels on their construction sites.

Dextra holds physical stocks on several continents, complemented in each country by the local inventories of our distributors. With this extended network, Dextra makes sure our products are always at reach no matter where our partners are.

For solutions that require to be customized, Dextra can also go beyond our standard delivery times and offer accelerated delivery schemes. Consult us for more information.

From 3 major industrial sites located in Bangkok (Thailand), Guangzhou (China), and Pune (India), Dextra completely owns its manufacturing facilities and processes. This allows us to have complete control over the timing of our operations and the quality of the solutions produced.

An independently accredited material testing laboratory, accredited to ISO-IEC17025, is located at Dextra’s main Bangkok factory, allowing the testing of material and products.

Dextra aims to supply products that exceed the most demanding international technical approvals and it is our goal to create maximum customer satisfaction by complying with our clients’ needs and specified requirements.

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