Safe escape routes thanks to strong bolt anchors

fischer heavy-duty fasteners for railway tunnels in Mexico

Safe escape routes thanks to strong bolt anchors
References
The first high-speed railway line is being built in Mexico. During tunnel works, steel anchors from the fischer group are used to secure the escape routes for future passengers.
To reduce traffic congestion in Mexico City and shift traffic from road to rail, the Secretaría de Comunicaciones y Transportes (SCT) (political secretariat of the government in Mexico for communication and transport) has been constructing the new line since 2014. The connection runs between the capital and Toluca City, a city with about half a million inhabitants, approximately 65 kilometers southwest of Mexico City. 
In addition to the "Secretaría de Comunicaciones y Transportes (SCT)", the "Secretaría de Energía (SENER)" (Secretariat/Ministry of Energy) is also responsible for the planning. The project managers awarded the contract for the construction and equipment of the route to a consortium of several companies. 
Almost the entire route runs above ground, with the track elevated on concrete supports. Only a 4.7-kilometer section runs underground through the tunneled mountain landscape of the Sierra de las Cruces. For this, a twin-tube tunnel is being constructed. Its two tubes are made of prefabricated concrete elements. To meet safety criteria, the planners have provided emergency walkways in the tunnel. These lead passengers to emergency exits, enabling people in dangerous situations to leave the tunnel. These walkways were reinforced with steel plates, which are securely fixed in concrete with fischer FAZ II bolt anchors size 20/60.

Project Profile

Object type:
Railway line
Route length:
58 km
What was fastened with fischer products?
Steel plates that reinforce emergency walkways within the tunnel
Maximum speed
160 km/h
Completion:
2023
The fischer bolt anchor FAZ II allows heavy loads to be fixed in cracked concrete. The steel anchor can be used particularly flexibly and installed easily and securely. When the nut is tightened, the conical bolt is pulled into the expansion clip and firmly clamps it against the borehole wall. This way, the bolt anchor safely transfers the loads into the concrete and enables the highest load-bearing capacity.

Ecological aspects played an important role in the planning of the route and the construction work. For example, those responsible replaced the initially planned side supports for the concrete track with central supports. Thousands of trees were thus spared from being cut down. The only tunnel on the new line was also built with the intention of preserving the natural mountain landscape of the Sierra de las Cruces.

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