tunnels
Delivering safe, efficient and technically advanced underground 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.
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.
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.
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.
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
delivered
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.