LSC™ Elements

Lining Stress Controllers (LSC™) are ductile support elements designed to control stress-induced deformations in weak ground during tunneling.
Installed in longitudinal construction joints of the primary tunnel lining, LSC™ composite elements absorb ground movements and relieve stresses before structural damage occurs.

System description

LSC™ Elements are designed with a lower load-bearing resistance compared to the primary tunnel lining, allowing them to absorb substantial deformations before the lining reaches critical stress levels.
Each system consists of multiple yielding elements placed between robust base plates, which fix the components in position and transfer the load uniformly to the lining. The yielding elements are factory-engineered with a controlled imperfection to initiate predictable deformation under excessive loading.

System components

By selecting the optimal type and number of LSC™ compression bodies, the supporting characteristics—such as force–shortening behavior—can be precisely adapted to specific project requirements. This ensures effective load management, controlled stress release, and maximum lining protection.

Base plates
Yielding elements
Mounting (reinforcement) bars

Features

Controlled stress management

Absorbs large ground deformations while maintaining optimal load-bearing capacity and preventing tunnel liner overstressing.

Controlled stress management

Absorbs large ground deformations while maintaining optimal load-bearing capacity and preventing tunnel liner overstressing.

Absorbs large ground deformations while maintaining optimal load-bearing capacity and preventing tunnel liner overstressing.
Adaptable performance

Customizable force–shortening characteristics to match individual project and geological conditions.

Adaptable performance

Customizable force–shortening characteristics to match individual project and geological conditions.

Customizable force–shortening characteristics to match individual project and geological conditions.
Enhanced tunnel safety

Ensures a steady, reliable increase in support resistance even under extreme or time-dependent deformation, extending the service life of the lining.

Enhanced tunnel safety

Ensures a steady, reliable increase in support resistance even under extreme or time-dependent deformation, extending the service life of the lining.

Ensures a steady, reliable increase in support resistance even under extreme or time-dependent deformation, extending the service life of the lining.