PRECASTING
Precast tunnel lining equipment
Segment moulds (stationary and carousel),
demoulding and handling equipment
In the underground infrastructure sector, the quality and durability of the concrete tunnel lining is essential to ensure safety, stability and resistance over time. AB Tunnelling supplies a wide range of equipment and materials for the entire process of precast tunnel lining and installation of concrete segments, with innovative solutions for moulding, sealing and reinforcement for precast concrete lining.
Our precast tunnel lining solutions include segment moulds, which are designed to ensure dimensional accuracy and maximum production efficiency, guaranteeing perfectly shaped ashlars ready for installation. Efficiency in the prefabrication of the ashlars also passes through the use of materials and technologies that improve the production process and guarantee high quality finishes.
Sealing gaskets and accessories
To protect concrete tunnel lining from the effects of water and mechanical stress, we offer high-quality sealing gaskets and connection systems, designed to ensure excellent waterproofing, durable performance, and precise precast tunnel lining assembly. Our solutions are developed to meet the demanding requirements of modern tunnelling projects, providing long-lasting protection and reliable integration with segmental lining systems.
- EPDM gaskets (anchored and glued)
- Mechanical connectors and shear bicones
- Bolts, washers, bolt sockets
- Guiding rods
- Load sharing cushions and hardfiber boards
- Grout and lifting sockets
- Service sockets
- Foam strip
Fibers for concrete reinforcement
To enhance the mechanical resistance of concrete, we have advanced synthetic and metallic fibres that improve tensile and flexural strength, reducing the risk of cracking and extending the life of the lining. These elements, combined with sealing agents and connection accessories, contribute to a concrete tunnel lining system that complies with the highest standards in the industry.
Steel fibers
Steel fiber by the cold wiredrawing of low carbon steel wire (min tensile strength around 1100-1200MPa) for sprayed concrete
Steel fiber by the cold wiredrawing of high resistance and high carbon steel wire (tensile strength between 2500 MPa and 3000 MPa) for precast segments
Steel fibers
Macro polymeric fibers
Both extruded polyester fibers and high tenacity polypropylene with additives fibres, featured by whole corrugated surface on both sides and double-hook (double-omega) ends.
This type of fibers is specially suitable and reliable in tough environmental situations, such as ports and docks in front of the sea, in presence of salt, chlorides and acid waters.
Steel fibers
Micro PP fibers
100% pure polypropylene microfiber for secondary concrete reinforcement and cement mix shrinkage control. Even used to improve the resistance of the structure to fire impact.
Steel fibers
Gfrp solutions
GFRP short for Glass Fiber Reinforced Polymer represents a groundbreaking composite material.
GFRP provides a reliable solution andensures maximum strength and long-term durability.
GFRP is even corrosion resistant, lightweight (1/4 the weight of steel) and electrically and thermically non-conductive.
Steel fibers
Robotic welding
- Vision systems programs have been created to make robots ever more interactive with the surrounding environment using 2D and 3D technologies for robot guide and visual inspection packages, guaranteeing high precision, reliability and efficiency in steel cages welding.
- Robotic welding plants are obtained using the various Mig single and double wire, Mag, Tig double wire welding technologies and with the use of joint tracking sensors, video camera with laser scanners.
Concrete release agent
AB Tunnelling offers an advanced, environmentally friendly release agent, formulated to facilitate the detachment of segments from the moulds without damaging their surface. The release agent ensures smooth surface finishes, minimizes the need for post-processing, and helps ensure consistent segment quality throughout production runs. It is solvent-free, biodegradable, and ideal for sustainable precast operations in modern concrete tunnel lining construction.
- Easy to apply, ready-to-use emulsion, ecofriendly
- Solvent free
- Readily biodegradable (OECD-301-B)
- Non-flammable.
Integrated solutions for great precast tunnel lining
The integration of these technologies into prefabrication processes allows for production optimization, improved concrete characteristics and reduced material waste, contributing to the creation of safer, more efficient and durable tunnels. Thanks to its experience in the sector and the quality of its products, AB Tunnelling confirms itself as a point of reference for those seeking reliable and innovative solutions in the field of concrete tunnel lining.
Contact us today to find out how our solutions can improve your tunnelling project.
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