Built to last
Immersed tunnels are critical infrastructure, connecting cities and carrying essential services across waterways for generations. As design life expectations push beyond 120 years, the question is no longer just whether a tunnel will last. It is how performance is actively preserved over time.
Correctly specified sealing systems are proven to outlast many other structural components within an immersed tunnel. Over six decades of real-world performance data consistently confirm this. Yet water tightness can still be compromised when the surrounding concrete and steel degrade, making targeted inspection and proactive maintenance essential, not optional.
Reactive maintenance is expensive and disruptive. Forward-thinking tunnel owners are shifting to preventative programs, using camera systems, leak detection and remote monitoring tools to track asset health before problems develop. Well-timed, minor upgrades can extend operational viability significantly, delivering greater long-term value.
Trelleborg's tunnel sealing systems are engineered to meet these demands, combining proven durability with full lifecycle support, from specification and supply to inspection and maintenance advisory services.