The Koralm high-speed rail project is currently underway in south-east Austria. It is part of the 2,400km trans-European Baltic-Adriatic Corridor that stretches from Gdansk and Gdynia on the northern coast of Poland to Bologna and Ravenna in northern Italy via Warsaw and Vienna, linking the Baltic and Adriatic seas.
The Koralm line will directly link Klagenfurt and Graz, the respective capital cities of Austrian states Carinthia and Styria, while reducing the travel time between the cities from three hours to less than an hour. The project is estimated to cost €11bn ($13.8bn) and includes 130km of double-track electrified line, 12 stations and stops, as well as a 32.9km-long tunnel, the longest railway tunnel of Austria.
Expected to be operational by 2023, the rail line will carry up to 256 high-speed trains a day running at a maximum speed of 250km/h. More than 100,000 jobs are expected to be created during the construction phases and roughly 40,000 jobs during operation.
Self drilling bolt is an advanced anchoring system extensively used in the high-speed railway projects for the slope reinforcement. It integrates drilling, grouting and anchoring as a whole. In complex conditions, self drilling bolt can replace anchor cable and the traditional rock bolt to overcome the difficulties of collapse, making holes and unfilled grouting, but also to ensure the stability of highway and people’s safety. The feature of timely grouting from the bottom to the mouth of the hole will ensure the grouting quality. Because of its unique construction technology and lots of advantages, self drilling bolt is well worth popularizing and applying.