Tunnelling

Delivering safe, efficient and technically advanced underground infrastructure

Full-scope engineering for tunnel infrastructure

Tunnelling is essential to modern mobility systems, enabling cities and regions to overcome topographical challenges and expand underground space for transport, energy, water and utilities. At Sener, we provide full-scope engineering for tunnel infrastructure — from conceptual design and geotechnical studies to construction management and safety systems integration. Our experience includes tunnels for railways, metros, roads and utility networks, combining innovation, structural precision and a strong focus on operational safety.

We have delivered tunnel infrastructure in high-speed rail, metro systems and highway corridors, including projects in complex urban environments, seismic zones and environmentally sensitive areas. Our portfolio covers Europe, the Americas, Asia, Oceania and Africa.

Why choose us

We combine geology, geotechnics, structural engineering, safety and electromechanical systems in fully integrated designs. Our methodology ensures tunnels that are durable, resilient and optimized for constructability, tailored to ground conditions, logistics and urban constraints.

Tunnels designed for resilience and safety

From shafts and galleries to safety protocols and systems, we reduce risks through simulation, structural optimization and proactive interface management, supported by ACROT, Sener’s tool for advanced risk control and operation assessment.

How we work

We begin with geotechnical and environmental assessments to define feasibility and the best tunnelling strategy. We then develop structural, electromechanical and safety systems in parallel, ensuring coordinated delivery from design to commissioning. During construction, we provide technical assistance, site supervision and operational readiness support.

Covering the full tunnelling lifecycle

Our approach includes fire evacuation studies, smoke control simulations, emergency ventilation, drainage and access logistics, fully integrated with control systems, signage and user safety. We close the cycle with ACROT Maintenance, Sener’s framework for risk control and long-term operation, ensuring continuous reliability.

tunnels

countries with Sener projects

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How we support tunnelling projects

We cover all aspects of tunnelling: geotechnical and seismic studies, excavation methodologies (TBM, NATM, cut-and-cover, microtunnelling), structural linings, ventilation, fire safety, drainage and access systems. Our teams apply advanced modelling (FEM, CFD), BIM, RAMS and digital twins to ensure robust designs and minimize risks.

BIM

Integrating Building Information Modeling to streamline design, construction, and asset management.

Accessibility

Designing inclusive environments that ensure equal access and usability for all individuals.

Tunnel design

Designing tunnels for safe, efficient underground transport and infrastructure.

Structural engineering

Engineering structural systems for safety, performance, and architectural integration.

Seismic design

Engineering structures to withstand seismic forces and ensure occupant safety.

Planning policy advice

Advising on planning policies to support sustainable development and compliance.

People movement

Designing mobility systems to ensure safe, efficient, and inclusive transport.

Construction management

Managing construction projects to ensure timely delivery, quality, and cost control.

Comissioning

Ensuring systems are tested and validated for optimal performance before operational launch.

Civil engineering

Delivering structural and infrastructure solutions for resilient and efficient environments.

Artificial Intelligence

Applying AI technologies to automate processes and generate predictive insights.

At Sener, we develop tunnelling solutions that connect, protect and endure — helping cities grow underground with confidence, safety and technical excellence.