More value through overall performance
Tunnels are important elements of an integrated infrastructure system. Railway tunnels in urban areas are part of complex public transportation networks that may provide routes for metro, light rail or main railway lines. Rail and road tunnels help relieve congestion in city centres. Tunnels also convey water and wastewater, keeping the urban society running. Tunnels for pressurised water mains are key elements in the production of sustainable energy from hydropower plants.
Our role is to advise and support private and public sector clients through the entire lifecycle of tunnel development. Our project experience of several decades covers the design and construction of more than 1 000 kilometres of tunnels for transportation infrastructure as well as 1 000 kilometres of shafts and water tunnels. Pöyry applies state-of-the-art techniques in the development of integrated and cost-effective solutions to tunnelling projects, responding immediately and effectively to client needs.
Our objective is to provide comprehensive services in the design and construction of the entire range of tunnels and other underground structures. We combine innovative solutions with well-proven systems in conceptual design, construction, maintenance and operation.
The range of services offered by Pöyry also includes ventilation and cooling design, project management, environmental surveys, risk and safety assessments, geological surveys, surveying, monitoring and site supervisions.
Our services include:
- Planning and design of tunnels and other underground structures
- Construction management and site supervision
- Geotechnical engineering and rock mechanics
- Renovation and refurbishment
- Ventilation and safety
Construction Management & Site Supervision
Successful construction and underground excavations rely on the correct evaluation of appropriate construction method. Our strength is formed from the capabilities of experienced engineering teams who are accustomed to reviewing different interdisciplinary problems and presenting various ways to tackle project demands. This approach leads to the identification of the most appropriate method for construction of a particular project. The optimal construction method is then adapted to the project requirements, and results in a technically perfect solution that minimises risks, cost and time.
During construction, a team of experienced engineers is available to perform site management and site monitoring. Our engineers use the latest in technologies to perform project and quality management, cost control, risk management and environmental site monitoring.
Range of Services
- Evaluation of construction methods
- Definition of supporting structures
- Comparison of logistical support
- Cost-benefit analysis
- Risk management and assessment
- Site management and supervision
- Project and quality management
Geotechnical Engineering & Rock Mechanics
Our team of highly qualified engineers and geologists offers the full range of services in geotechnical engineering and rock mechanics. Our expertise is based on our global experience in designing challenging underground structures in difficult geological conditions. We offer complete project development, from conceptual and feasibility studies to monitoring of excavations and on-site determination of support. Technical knowledge, practical experience on-site, participation in international forums and familiarity with modern computer technology all guarantee that rock mechanical challenges are met. Our goal is to provide technically optimised solutions that minimise cost and risk.
Range of services
- Assessment and classification of rock masses
- Geological modelling and rock mass structures
- Determination of geo-mechanical parameters
- Analyses and design with 2D and 3D models
- Prediction of stresses and deformation
- Design and optimisation of excavation methods and support
- Short and long-term stability analysis
- Monitoring and instrumentation of underground excavations
- Expert opinions and special consultancy services
Planning & Design of Underground Structures
Our multidisciplinary teams offer design services for all phases of tunnelling and underground structures, from master planning feasibility studies design and engineering to technical assistance during construction and operation.
Our professional approach towards analysis and problem-solving of specific tunnelling and underground issues is based on an in-depth understanding of all possible excavation methods - whether in hard rock or soft soil. Our design teams are used to evaluate the results of geological investigations to find optimum solutions for best-route analysis and best-method assessment. Risk analysis, planning and scheduling, as well as environmental impact assessment are integral parts of our service offerings, leading to an optimised design that helps clients minimise risks, cost and construction time.
Range of services
- Preliminary studies
- Basic design
- Statical analysis
- Detailed design
- Tender documentation
Renovation & Refurbishment
Our multidisciplinary teams are actively involved in important tunnel projects that serve different purposes and view each project with an entire lifecycle approach. This valuable experience enables us to give comprehensive advice on both detailed issues within a project phase and also from an entire project holistic point of view. Our teams develop refurbishments following tunnel inspections, condition analysis, long-term deformation monitoring and status assessment. Design and implementation of renovation measures are undertaken following close co-operation with client needs.
Range of services:
- Tunnel inspections
- Deformation measurements
- Long-term deformation monitoring
- Condition analyses
- Design of rehabilitation measures
Ventilation & Safety
Concept and design of the ventilation system is of fundamental importance to every tunnel. The system selected can have a considerable influence on the tunnel's cross section, its alignment, the number and size of its ventilation shafts, the effect the tunnel will have on the environment and the amount of land it will require.
A number of severe tunnel fires have revealed how important fire safety is in tunnels. The ventilation system serves as one of the main safety installations in such events. Modern ventilation systems can keep tunnels free of smoke in emergency situations and, in this way, help to protect people.
Road tunnels have to be ventilated during normal operation in order to reduce the intensity of vehicle emissions. Even long rail tunnels and underground rail systems require a ventilation system for operation. Here, they control not only the quality of the air but also operating temperature and air humidity.
Our many years of experience in projects that span the globe allows our experts to support clients in all aspects of ventilation and tunnel safety engineering, from simulation modelling up to detailed design, as well as management and supervision of the installation works.
Range of services:
Conceptual design of tunnel ventilation and safety systems
Study of alternatives, feasibility studies for tunnel ventilation systems and escape routes in all operating situations, development of new solutions taking into account project-specific constraints, assessment of environmental aspects in tunnel ventilation systems, control and regulation concepts for ventilation systems.
Detailed design of tunnel ventilation and safety systems
Planning and design from the pre-project phase right up to project implementation - tender documents, evaluation of bids and factory checks; site management, assembly checks and acceptance tests, planning and site monitoring, complete system tests and initial use.
Tunnel ventilation and cooling systems
Design and implementation of ventilation and cooling systems for all underground structures, provision of expert reports and advice in the field of air conditioning, cooling and ventilation systems.
Refurbishment of tunnel ventilation systems including inventory and performance analysis for existing installations, design, planning and management of restoration of refurbishment measures with or without tunnel operation.
Safety and risk analysis
Check of safety systems, assessment of fitness for purpose, scope and effectiveness for required safety measures, quantified risk analysis, RAMS studies, analysis of best possible design for escape routes.