📋 Tender Overview
While digging on the last kilometer of the Koralm tunnel on the Carinthian side the interior work is in full swing on the Styrian side. More than 40 percent of the inner shell of the entire Koralm tunnel has already been completed. In around five years rail travelers will be half an hour faster between Vienna and Klagenfurt through the Koralm tunnel.The Koralm tunnel is currently one of the longest railway tunnels in the world. The second breakthrough in the mega tunnel is expected in the first half of the year. In parallel to the excavation work the shell is already being worked on with the corresponding inner shell - it serves as a seal and also has static functions. From the Styrian side more than 18 km have now been installed. Around two thirds of the two tunnel tubes are equipped with such an inner shell. From the Carinthian side the formwork will start in the coming days.Tunnel is turned into concreteUp to four concrete formwork carriages each 12.5 meters long are currently in the tunnel from the Styrian side. An entire length of wagons - a so-called block - can be concreted per day and formwork wagon. The required concrete is largely made from the tunnel excavation material. For this purpose the excavated material is carefully sieved and broken. In this way more than 1.3 million tons of rock are reprocessed for on-site concrete production. The concrete itself is produced on site in two mixing plants. One system is located directly in the tunnel another at the construction site above ground.130000 truck journeys savedMost of the required material is transported to the construction site by rail. After all every ton of freight on the rail causes about 21 times less greenhouse gas emissions than with an average truck. This not only saves resources it also saves around 130000 truck trips.Graz - Klagenfurt in 45 minutesThe next big milestone for the Koralm tunnel is approaching in spring of this year The north tube between Styria and Carinthia will be cut through thus all the tunneling work has been completed a historic milestone in the Koralm Railway project of the century.The Koralm tunnel is the heart of the 130 km Koralm railway between Graz and Klagenfurt. After completion in 2025 passengers can travel from the clock tower to Lake Wrthersee in just 45 minutes. The journey time between Vienna and Klagenfurt is 3 hours 30 minutes after commissioning. Together with the Semmering base tunnel completion in 2027 you can travel only 2 hours 40 minutes - instead of the previous approx. 4 hours.
