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Tunnel surveys
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Solutions for Engineering - Tunnel surveys |
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Whether tunnels service rail networks or road vehicles, and whether they travel underground, under water or through mountains, instruments and solutions from Leica Geosystems provide accurate measurements and safe monitoring.
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Modern railway infrastructure often presents technical challenges for developers and builders alike, since high-speed railway tracks have to withstand enormous forces and vibrations. This also applies to the 123 km section between Erfurt and Leipzig/Halle, which forms part of the new Intercity Express (ICE) link between Munich and Berlin. Deutsche Bahn AG customers will eventually be travelling along this stretch at speeds of up to 300 km/h (190 mph), completing their journeys to or from the German capital in four rather than the current six hours. The ICE will travel over six major bridges and through three tunnels, the longest being the twin-tube Finne Tunnel with a length of almost seven kilometers. The precise control of the concrete paver that provided the bed for the subsequent track construction through the tunnel was accomplished with total stations and the 3D machine control system PaveSmart 3D from Leica Geosystems. more
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3D laser scanning has become established in many applications over recent years due to its potential for rapid, non-contact data capture at a high scanning density. That this process can also be used successfully for the investigation of deformations of large surfaces is demonstrated by a research project at the Technical University Munich, Germany (TUM). The Leica HDS6000 laser scanner proved to be a success when scanning the area around the working face of an extension tunnel to the underground railway system in Stuttgart. more
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With the modernization of its railway infrastructure, Switzerland seeks to connect to the European high-speed train network and achieve a reduction in the amount of the transit traffic on its roads. One of the key projects is the “Alp- Transit Gotthard”, at the heart of which is the Gotthard Base Tunnel: A 57-km-long twin-tube railway tunnel and the longest tunnel in Europe. A challenge to the surveyors – under and on the mountain. more
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The E18 Bjørvika project, scheduled to be completed in February 2010, will improve the environment of Oslo’s inner city and enhance the area around the new opera near Bjørvika harbour by moving traffic underground – and under water. Part of this ambitious project is a subsea tunnel – the first one ever built in Norway – consisting of six 100 m long elements. The shape of the tunnel is an additional challenge for the engineers: each element is curved, and some of them were built on a flat floor in the dry dock, but will have to fall to the seabed to reach their final destination. A case for Leica Geosystems’ High Definition Surveying™, as told by Frode Edvardsen from contractor Skanska in Norway. more
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Ranked among the largest stub terminals in Europe, Leipzig's main rail station is one of the most important transportation nodes in Central Germany's regional and long-distance public transport system. The stub terminal certainly offers travellers easy access and convenient connections but its architecture makes changes in the direction of travel very time-consuming and takes up a much greater area than a through station would. One of Germany’s most complex tunnel projects shall end this situation: The City-Tunnel Leipzig. more
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"Boston's massive 'BigDig' project has taken advantage of numerous technology innovations during its 15-year life. The latest technology success story is the project's use of Leica Geosystems' High-Definition Surveying (laser scanning) systems (Reporter 51, August 2004)." more
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(Reporter 50, April 2004)
The Alp Transit Gotthard is an ambitious railway construction project, which will incorporate the world's longest railway tunnel of 57 km travelling through the Swiss Alps and under the St. Gotthard massif. Future passenger trains will journey at speeds of up to 250 km/h, adding further to the highly successful European high-speed network and bringing a huge reduction in travelling time. The combined surveying systems of Leica Geosystems and Amberg Technologies AG are greatly assisting the tunnel workers in their day-to-day work - not only reducing time needed to ensure that excavation is correctly undertaken, but also making the whole construction process much more efficient and accurate. more
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The project for the construction of tunnels as part of the new extension of Prague’s Underground was faced with certain space limitations due to the location of an existing station. In addition, the particularly rough terrain in the area had considerable influence on the position of the planned station. At the place of crossing, the line is located at a depth of only one metre under the riverbed of the Vlatava. This minimal depth of the overlaying formation prevents the use of the tunnelling method, and therefore there remains only one “classical“ method of construction – cofferdams. It was decided to use three cofferdams for the tunnel crossing situated in the Vlatava stream channel. more
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In the lower Emmental, this 1.6 kilometre-long tunnel is being built below the River Emme. It is part of the Bahn2000 new construction section that will allow travel from Bern to Zurich. Using automated steering with a
3D-Machine Guidance System of Leica Geosystems, shoulders have now been laid in the biggest “Emmentaler Hole”. more
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Tough times for a LEICA TCA1700 series instrument: measuring boreholes in a man-made ice cavern at a tunnel construction site at Kingston-upon-Hull in north-west England. more
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Leica survey instruments in Sydney also used underground on major environmental protection projects. more
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Geodetic surveys of Vereina Tunnel - Switzerland
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In the midst of harsh terrain, surveyors in astronaut-like garb stake out the route for a new gas pipeline. Determining their position
in real-time with the aid of satellites and the Leica MC1000 and SR 9500, they perform the groundwork for one of the largest-ever land based pipeline projects. more
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The subway is perhaps in many cases the epitome of a nation's transport system. more
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With 340 points within the tunnel, the Leica TCA2003 Automated total station will measure for you -24 hours a day. more
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