Shear Cones

Shear cones are used in precast concrete tunnel linings to help transfer shear loads between adjoining tunnel rings at the circumferential joint. They support reliable ring-to-ring load transfer and can help reduce stress concentration at the joint.

Optimas International works with contractors and precast manufacturers to support the specification and supply of shear cones for tunnel projects. We help identify solutions suited to the project’s segment geometry, ring-to-ring shear loading requirements and wider tunnel jointing system, including bolting, dowel systems and radial coupling.

Shear cones are fitted within the circumferential joint faces of precast tunnel segments and are combined with dowel and bolting systems between rings.

Shear cones are particularly valuable where ring-to-ring shear loading is a significant design consideration. Shear cones can be used at tunnel sections with low earth cover, at entrance or exit of tunnels, or at openings for cross passages.

Shear cones can be specified for a range of precast concrete tunnelling projects, including metro, rail, road, utility and sewer tunnels.

Yes. Shear cones typically form part of a wider tunnel jointing package alongside bolting systems, dowel systems and radial coupling. These components work together to support the assembly and structural performance of the precast tunnel lining.

Shear cones are specified according to the requirements of the tunnel lining and joint design, including segment and ring geometry and ring-to-ring shear loading requirements. Optimas International can provide specification and supply support based on the project requirements.

OPTI.Fix® provides a more efficient method for fixing sockets within segment moulds, helping save time during installation and demoulding while reducing maintenance and supporting improved production consistency and automation.