Grouting and Lifting Systems

Grouting and lifting systems are used to help install and handle precast concrete tunnel segments. The grouting system fills the annular space, while integrated lifting points support safer handling and positioning of each segment.

Annulus grouting fills the gap between the outside of the tunnel lining and the surrounding ground. Completing this grouting helps reduce voids around the tunnel, which can contribute to ground movement and surface settlement.

Optimas International supplies systems that can accommodate both mortar and pea gravel grouting. The appropriate method depends on the tunnel design and project requirements.

The system is designed with the pumping pressure and grout flow requirements in mind. Once grouting is complete, the injection point is sealed to help prevent grout from flowing back out of the tunnel lining.

Yes. Grouting and lifting systems are specified around the requirements of each project. Factors can include tunnel diameter, ring design, segment weight, ground conditions, grouting method and how the tunnel segments will be handled and positioned.

These systems can be used across a range of tunnelling applications, including metro, rail, road, utility and sewer tunnels. System selection is based on the specific requirements of the tunnel and installation method.

Integrated lifting points provide a designated way to handle and position precast concrete tunnel segments during installation. This can help make segment handling safer and more controlled during tunnel construction.

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.