Shiraz Metro – Railway Technology

This article delves into the technological advancements and infrastructural development of the Shiraz Metro, a significant urban transportation project in Iran. The project aims to alleviate traffic congestion, improve commuting times, and enhance the overall quality of life for Shiraz residents. We will explore the various phases of the project’s implementation, from initial planning and design to the procurement of advanced technologies and the ongoing expansion of the network. A detailed analysis of the technological choices made in constructing the lines, including tunnel boring methods, signalling systems, and rolling stock specifications, will be presented. The project’s success relies on the efficient integration of various engineering disciplines, international collaboration, and careful consideration of local conditions. Furthermore, the article will examine the long-term operational aspects and the potential for future expansions, assessing the project’s impact on sustainable urban development in Shiraz.

Line 1: A Case Study in Underground Construction

Line 1, initially spanning 10.5 km from Ehsan to Namazi, showcases the complexities of urban underground rail construction. Its subsequent extension to Gol-e-Sorkh Square adds another 14km, highlighting the project’s phased implementation strategy. The predominantly cut-and-cover method used for the construction, coupled with the use of two parallel tunnels (6.6m diameter each), presented considerable engineering challenges. The construction employed two Earth Pressure Balance (EPB) Tunnel Boring Machines (TBMs), weighing 600 tons each, with a significant power output (1,600kVA installed, 900kW cutterhead). These machines, supplied by NFM Technologies, were instrumental in excavating the tunnels, with the excavated material transported via screw conveyors. The 20 underground stations, each 100m long and 20m wide, incorporated advanced passenger information systems (PIS), provided by Arya Hamrah, displaying information in both English and Farsi.

Technological Integration Across the Network

The Shiraz Metro project is a testament to the integration of various technologies. The signalling, telecommunications, and traffic management systems for Line 2 were designed by Penta Engineering. Alcatel-Lucent supplied the telecommunications network equipment and services. Tabiran played a crucial role in designing, engineering, installing and operating the air ventilation and smoke exhaust systems for stations and tunnels. Furthermore, the selection of Alstom’s Metropolis flexible trains, known for their reliability and performance in major cities worldwide, underscores the commitment to utilizing proven technology. The power infrastructure utilizes a 1,500VDC supply system. These choices demonstrate a focus on reliability, safety, and operational efficiency. The rolling stock contract, awarded to IRICO (Iranian Rail Industries Development), included a comprehensive scope encompassing design, manufacturing, and after-sales support, ensuring a long-term operational partnership.

Expanding the Network: Lines 2 and Beyond

The construction of Line 2, a 10km line intersecting Line 1 at Imam Hosseini Square, further demonstrates the ambitious scope of the project. This line, expected to carry approximately 16,000 passengers per hour, will include eight underground and two at-grade stations. Future plans include four additional lines, including a 10km monorail (Line 3) and several other lines that will enhance connectivity throughout the city. This phased expansion allows for incremental improvements to the city’s transportation infrastructure while minimizing disruption during construction.

International Collaboration and Local Expertise

The Shiraz Metro project represents a successful example of international collaboration. SYSTRA, a leading global consultancy in transportation infrastructure, conducted an independent review of the project’s operational studies and designs. The involvement of international companies like Alstom, Alcatel-Lucent, and NFM Technologies brought valuable expertise and cutting-edge technologies to the project. Simultaneously, local contractors like Bamrah (responsible for cut-off walls and excavation), Anuua (civil works), Ducab (power cables), and Abhar Wire & Cable (low-voltage cables) played crucial roles in the project’s success, showcasing the importance of effective partnerships between international firms and local contractors. This approach ensured both technology transfer and the creation of local employment opportunities.

Conclusions

The Shiraz Metro project stands as a significant achievement in urban rail development, demonstrating Iran’s commitment to modernizing its transportation infrastructure. The phased approach to construction, using both cut-and-cover and tunnel boring methods, has allowed for the efficient development of a complex underground rail system. The integration of advanced technologies, from sophisticated tunnel boring machines to state-of-the-art signalling systems and energy-efficient rolling stock, reflects a commitment to operational excellence and passenger comfort. The strategic partnerships with international firms and local contractors have facilitated the transfer of knowledge and skills, fostering local capacity building. The project’s success lies not only in its engineering feats but also in its ability to leverage international expertise while empowering local businesses. The ongoing expansion plans underscore the long-term vision for sustainable urban development in Shiraz, promising improved connectivity and mobility for its citizens. Future phases must consider scalability, maintaining efficient operation as the system grows, and adapting to changing technological advancements in the rail industry. The careful consideration of these factors will ensure the long-term success and sustainability of this vital urban transportation network.

Company Information:

• Alstom: A leading global manufacturer of rolling stock and railway systems.
• SYSTRA: A global consulting and engineering firm specializing in transportation infrastructure.
• Penta Engineering: A specialized engineering firm focused on rail signalling and control systems.
• Tabiran: A contractor specializing in HVAC (Heating, Ventilation, and Air Conditioning) systems for tunnels and stations.
• Alcatel-Lucent: A telecommunications equipment and services provider.
• Bamrah: A construction company specializing in excavation and ground improvement.
• NFM Technologies: A supplier of tunnel boring machines (TBMs).
• Anuua: A construction company specializing in civil works.
• Ducab: A cable manufacturing company.
• Abhar Wire & Cable: A cable manufacturing company.
• Arya Hamrah: A supplier of passenger information systems.
• IRICO (Iranian Rail Industries Development): A major player in the Iranian railway industry.