Dr. Rüdiger Giese from the GeoForschungsZentrum Potsdam (GFZ) and his team receive the "Technology Transfer Award 2008” from the Technology Foundation Brandenburg for the development of a new system for use in tunnel pre-exploration, the ISIS.
The ISIS (Integrated Seismic Imaging System ISIS) is a method which enables the preliminary exploration of the rock mass in a tunnel. The technical innovation here in lies particularly in the fact that with this procedure sounding-explosions are no longer necessary and the system can be employed while actual tunnel construction work is running. Herewith tunnel excavation will be safer, faster and more efficient.
In spite of all progress to date, tunnel construction is still a technical and economical risky undertaking. The biggest imponderability is that an exact pre-exploration of the rock mass in which the tunnel drilling machine has to drill is essential. To investigate the rock material in front of the tunnel drilling machine seismic procedures are usually applied: a small explosive charge is ignited and the propagation of the explosion’s sonic waves are evaluated. For this purpose the tunnel drilling machine has to stop operation and construction work is interrupted. – with costs of around 100 Mio. Euro for such a machine, a significant cost factor.
And this is where the ISIS comes to use. The ISIS allows for the forecasting of the geological characteristics of the rock mass in the surroundings of tunnel excavation in advance and without disturbing drilling procedures to any great extent – similar to ultrasound in medicine.
“The idea is to use the tunnel-anchor, to install a measuring system for seismic three-component receivers with their antenna in such a way that a high-resolution seismic image of the rock mass during excavation is possible” says Dr. Rüdiger Giese. “Small earth-microphones (geophones) serve as receivers, which are implanted in the pinnacles of the rock anchor. Herewith the different seismic waves can be supersensitively compiled. The data gives information on changes in the rock mass and eventually on water-bearing stratum”.The anchors are cemented in meter-deep boreholes. They can be fixed radial to the tunnel or in the direction of tunnelling. The seismic impulses are triggered with a pneumatic hammer or an electromagnetic vibration source, whereby the impulses radiate in the specified direction and can be repeated in intervals of seconds.
And all this can take place during the ongoing tunnelling procedure.
The system has already been applied during the construction of the new St. Gotthard tunnel and in the tunnelling of Nessy’s home, Lough Ness.
“We are pleased that we could obtain Herrenknecht AG, the global market leader in tunnel excavation as our partner for the market launch of the ISIS System. This is thanks to the excellent work of Herr Giese’s team. I heartily congratulate Dr. Giese on receiving this award”, says Professor Dr. Reinhard Hüttl, Scientific Executive Director of the GFZ Potsdam on this occasion.
Franz Ossing | alfa
Cause for variability in Arctic sea ice clarified
14.05.2019 | Max-Planck-Institut für Meteorologie
Arctic rivers provide fingerprint of carbon release from thawing permafrost
08.05.2019 | Stockholm University
Engineers at the University of Tokyo continually pioneer new ways to improve battery technology. Professor Atsuo Yamada and his team recently developed a...
With a quantum coprocessor in the cloud, physicists from Innsbruck, Austria, open the door to the simulation of previously unsolvable problems in chemistry, materials research or high-energy physics. The research groups led by Rainer Blatt and Peter Zoller report in the journal Nature how they simulated particle physics phenomena on 20 quantum bits and how the quantum simulator self-verified the result for the first time.
Many scientists are currently working on investigating how quantum advantage can be exploited on hardware already available today. Three years ago, physicists...
'Quantum technologies' utilise the unique phenomena of quantum superposition and entanglement to encode and process information, with potentially profound benefits to a wide range of information technologies from communications to sensing and computing.
However a major challenge in developing these technologies is that the quantum phenomena are very fragile, and only a handful of physical systems have been...
Working group led by physicist Professor Ulrich Nowak at the University of Konstanz, in collaboration with a team of physicists from Johannes Gutenberg University Mainz, demonstrates how skyrmions can be used for the computer concepts of the future
When it comes to performing a calculation destined to arrive at an exact result, humans are hopelessly inferior to the computer. In other areas, humans are...
Scientists develop a molecular recording tool that enables in vivo lineage tracing of embryonic cells
The beginning of new life starts with a fascinating process: A single cell gives rise to progenitor cells that eventually differentiate into the three germ...
29.04.2019 | Event News
17.04.2019 | Event News
15.04.2019 | Event News
17.05.2019 | Materials Sciences
17.05.2019 | Physics and Astronomy
17.05.2019 | Materials Sciences