fischer heavy-duty fixings for railway tunnel in Mexico 01 June 2021

The first high-speed rail line in Mexico is currently being built using steel anchors by the fischer Group of Companies – used during the tunnel construction to secure escape routes for future passengers.

Mexico’s Secretariat of Communications and Transport (SCT) has been building the new rail line since 2014 to reduce congestion in Mexico City and to shift traffic from the streets onto the railway. The line will connect the capital and Toluca, a city with roughly half a million inhabitants located approximately 65km south-west of Mexico City. The 58km electrified Tren Interurbano México Toluca line is expected to be completed in 2023. The first section is expected to start running during the second quarter of 2021, however. The new line has been designed for a capacity of 230,000 to 270,000 passengers, who will reach their destination in 39 minutes, instead of two hours, at speeds of up to 160km per hour.

Almost the entire line is above ground, with the railway line being supported on concrete columns. Only one part measuring 4.7km in length will run below ground in a tunnel portion underneath the Sierra de las Cruces mountain range, which involves the construction of a twin tunnel – with the two tubes made of prefabricated concrete elements.

The planners have designed emergency walkways in the tunnel to meet safety criteria, which lead passengers to emergency exits. This allows people to exit the tunnel in dangerous situations. The walkways were reinforced with steel plates that were securely installed in concrete with fischer FAZ II bolt anchors in size 20/60, of which approximately 19,000 units were used.

The fischer bolt anchors FAZ II allow heavy loads to be fastened in cracked concrete. The steel anchors can be used flexibly and are simple and safe to install. The cone bolt is pulled into the expansion clip by tightening the nut, expanding firmly against the wall of the drill hole. The bolt anchors thereby safely transfers the loads into the concrete, achieving the highest load-bearing capacity. “We not only convinced our client with steel anchors that were suitable for the project but also with our technical support, timely delivery and good price performance ratio,” emphasises Juan Manuel Fernández, engineering coordinator for the fischer subsidiary in Mexico. 

Deputy Editor

Claire Aldridge Deputy Editor t: +44 (0) 1727 743 889


Having spent a decade in the fastener industry experiencing every facet – from steel mills, fastener manufacturers, wholesalers, distributors, as well as machinery builders and plating + coating companies, Claire has developed an in-depth knowledge of all things fasteners.

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