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Tunnelling & Underground

At SYSTRA Italy, we specialise in the design of tunnels and underground structures. Dense surface environments, topographical challenges, and limited space are making underground solutions increasingly attractive, especially in urban areas. We have extensive experience designing and constructing urban tunnels in complicated geological contexts and congested areas.

Railways

Our offices conceive innovative and reliable solutions for the most widely used rail transportation systems. Our expertise in Conventional Rail Links, High-Speed Lines (HSL), covers alignment and general design, structural and geotechnical design of civil works, trackworks, signalling, earthworks and drainage, MEPs, environmental criteria.

Urban Mobility

Our offices develop cutting-edge and dependable solutions for urban mobility, including Bus Rapid Transit (BRT) and rail transportation systems. Our expertise spans Conventional Rail Links, High-Speed Lines (HSL), Light Rail Transit (LRT), and BRT, covering alignment and general design, structural and geotechnical design of civil works, trackworks, signalling, earthworks and drainage, MEPs, and environmental criteria.

Roads

We manage a wide variety of projects, from the simplest to the most complex highway and road interchanges. Our expertise covers different technical areas such as alignment and general design, structural and geotechnical design of civil works, roadworks, earthworks and drainage, MEPs, environmental criteria.

Bridges

At SYSTRA Italy, we develop every type of bridge, from the simplest continuous viaduct to complex suspension and cable-stayed bridges. Our expertise not only covers the design of new bridges but also the structural rehabilitation of ancient and historical bridges made of concrete, steel, and masonry. Our services encompass all design stages, from concept design to on-site assistance, including geotechnical, structural, and architectural studies.

Buildings

Our engineers have technical competence and functional sensitivity to help our clients shape their ambitious projects. Our expertise covers many different technical areas such as structural design, retrofitting, fire engineering, seismic engineering, performance-based design, MEPs, robustness analysis.

Water

Since our foundation, we have developed advanced skills in the field of hydraulics studies and hydropower facilities. The combination of quality and creative thinking allows our engineers to deliver a wide set of services, ranging from feasibility studies to detailed design and construction assistance.

Services

Design

Our design services include shop drawings, feasibility studies, concept design, preliminary and detailed design, and architecture and landscape design. We provide innovative solutions tailored to each project’s unique requirements, ensuring high-quality outcomes.

Project Management

Our project management expertise includes project planning, monitoring, and risk assessment. We ensure projects are completed on time, within budget, and to the highest quality standards, minimising risks and maximising efficiency.

Construction Management

Our construction management services encompass planning, monitoring, and risk assessment. We ensure construction projects progress smoothly, maintaining high safety and quality standards throughout the process.

Value Engineering

Our value engineering services focus on project optimisation through new technologies and advanced FE simulations. We ensure cost-effective, innovative solutions that enhance project performance and efficiency.

MEP Design

We specialise in MEP design services, covering complete safety system design, ventilation and fire safety, CFD simulation, and ventilation strategies. Our commissioning support ensures optimal system performance from the outset.

BIM Modelling

We offer comprehensive BIM modelling services for civil works, roads, landscapes, finishes, and MEPs. Our BIM implementation enhances project accuracy and efficiency, supporting better planning and execution.

Tender Assistance

We provide tender assistance with communication strategies, professional graphic support, schematics, renderings, and illustrative videos. Our services help present project proposals effectively, increasing the chances of success.

Independent Check

We offer independent checks for code compliance, technical content accuracy, and project buildability. Our assessments ensure projects are ready and feasible, providing reliable validation and peace of mind.

Innovation

Tunnel Tech

Thanks to 40 years of experience in the field of underground structures, SYSTRA Italy developed advanced skills in providing innovative solutions for tunnel design and construction, supporting its clients in adding value to their challenging projects.

More

Digital Project

Effective infrastructure design requires massive data manipulation. In order to deal with this demanding challenge, we developed an innovative design approach, based on the collection & manipulation of all project data in a flexible and dynamic database.

More

SSS.infra

SSS.infra is a rigorous design Guideline developed and patented by SYSTRA Italy for the quantitative multicriteria performance assessment of sustainable infrastructure and for the retrofitting of the existing transportation network.

More

i.BIM

i.BIM represents the way SYSTRA Italy goes beyond the current limits of Building Information Modelling, providing customised workflows and post-processing tools aimed at making infrastructure projects more reliable, productive and profitable.

More

System Engineering

We provide rail system services throughout the design and delivery phases. Our expertise in integrating complex transport systems is backed by an in-depth understanding of each subsystem, including signaling, communications, traction power supply, and overhead contact systems (OCS), as well as their interdependencies.
At SYSTRA Italy, we specialise in the design of tunnels and underground structures. Dense surface environments, topographical challenges, and limited space are making underground solutions increasingly attractive, especially in urban areas. We have extensive experience designing and constructing urban tunnels in complicated geological contexts and congested areas.

Our offices conceive innovative and reliable solutions for the most widely used rail transportation systems. Our expertise in Conventional Rail Links, High-Speed Lines (HSL), covers alignment and general design, structural and geotechnical design of civil works, trackworks, signalling, earthworks and drainage, MEPs, environmental criteria.

Our offices develop cutting-edge and dependable solutions for urban mobility, including Bus Rapid Transit (BRT) and rail transportation systems. Our expertise spans Conventional Rail Links, High-Speed Lines (HSL), Light Rail Transit (LRT), and BRT, covering alignment and general design, structural and geotechnical design of civil works, trackworks, signalling, earthworks and drainage, MEPs, and environmental criteria.

We manage a wide variety of projects, from the simplest to the most complex highway and road interchanges. Our expertise covers different technical areas such as alignment and general design, structural and geotechnical design of civil works, roadworks, earthworks and drainage, MEPs, environmental criteria.

At SYSTRA Italy, we develop every type of bridge, from the simplest continuous viaduct to complex suspension and cable-stayed bridges. Our expertise not only covers the design of new bridges but also the structural rehabilitation of ancient and historical bridges made of concrete, steel, and masonry. Our services encompass all design stages, from concept design to on-site assistance, including geotechnical, structural, and architectural studies.

Our engineers have technical competence and functional sensitivity to help our clients shape their ambitious projects. Our expertise covers many different technical areas such as structural design, retrofitting, fire engineering, seismic engineering, performance-based design, MEPs, robustness analysis.

Since our foundation, we have developed advanced skills in the field of hydraulics studies and hydropower facilities. The combination of quality and creative thinking allows our engineers to deliver a wide set of services, ranging from feasibility studies to detailed design and construction assistance.

Our design services include shop drawings, feasibility studies, concept design, preliminary and detailed design, and architecture and landscape design. We provide innovative solutions tailored to each project’s unique requirements, ensuring high-quality outcomes.

Our project management expertise includes project planning, monitoring, and risk assessment. We ensure projects are completed on time, within budget, and to the highest quality standards, minimising risks and maximising efficiency.

Our construction management services encompass planning, monitoring, and risk assessment. We ensure construction projects progress smoothly, maintaining high safety and quality standards throughout the process.

Our value engineering services focus on project optimisation through new technologies and advanced FE simulations. We ensure cost-effective, innovative solutions that enhance project performance and efficiency.

We specialise in MEP design services, covering complete safety system design, ventilation and fire safety, CFD simulation, and ventilation strategies. Our commissioning support ensures optimal system performance from the outset.

We offer comprehensive BIM modelling services for civil works, roads, landscapes, finishes, and MEPs. Our BIM implementation enhances project accuracy and efficiency, supporting better planning and execution.

We provide tender assistance with communication strategies, professional graphic support, schematics, renderings, and illustrative videos. Our services help present project proposals effectively, increasing the chances of success.

We offer independent checks for code compliance, technical content accuracy, and project buildability. Our assessments ensure projects are ready and feasible, providing reliable validation and peace of mind.
Thanks to 40 years of experience in the field of underground structures, SYSTRA Italy developed advanced skills in providing innovative solutions for tunnel design and construction, supporting its clients in adding value to their challenging projects.

Read more

Effective infrastructure design requires massive data manipulation. In order to deal with this demanding challenge, we developed an innovative design approach, based on the collection & manipulation of all project data in a flexible and dynamic database.

Read more

SSS.infra is a rigorous design Guideline developed and patented by SYSTRA Italy for the quantitative multicriteria performance assessment of sustainable infrastructure and for the retrofitting of the existing transportation network.

Read more

i.BIM represents the way SYSTRA Italy goes beyond the current limits of Building Information Modelling, providing customised workflows and post-processing tools aimed at making infrastructure projects more reliable, productive and profitable.

Read more

We provide rail system services throughout the design and delivery phases. Our expertise in integrating complex transport systems is backed by an in-depth understanding of each subsystem, including signaling, communications, traction power supply, and overhead contact systems (OCS), as well as their interdependencies.
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Home Projects FRÉJUS TUNNEL SAFETY GALLERY

FRÉJUS TUNNEL SAFETY GALLERY

Technical details

Client

Societé Francaise du Tunnel Routier de Fréjus (SFTRF) and Società Italiana Traforo Autostradale del Fréjus (SITAF)

Dates

2008 – ongoing

Missions

General consultant, Project manager, Project management consultant, Design engineering supervision, Construction management

Location

Italy

Excavation of associated structure while keeping the tunnel in operation.

The project included the excavation of a 13km tunnel, parallel to the existing cross-border tunnel to convert the single tube shield Fréjus tunnel into twin tubes designed for unidirectional traffic. The excavation of the safety gallery, shelters and associated structures were done while keeping the tunnel open to road traffic with a careful monitoring of vibrations on tunnel structure.

The first 650m of the gallery on the French side were excavated using the NATM method, a hard rock TBM with shield was then used to bore the tunnel southwards with a maximum overburden of 2,000m. On the Italian side, the construction of new multifunctional buildings adapted to the needs of the rescue, management and maintenance services.

Some examples of projects in Tunnelling & Underground

A14 BOLOGNA – BARI – TARANTO HIGHWAY

CLUJ-NAPOCA METRO & SUBURBAN TRAIN

E6 RENTVANNSTUNNEL

GRAND PARIS EXPRESS, Line 14 lot GC04

TOPRAKKALE – BAHÇE CONVENTIONAL RAILWAY

TUNNEL T1 DJEBEL EL OUAHCH, Collapsed tunnel restoration

See a selection of SYSTRA's projects