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
World's first solar fuels reactor for night passes test
21.02.2018 | SolarPACES
Geophysicists and atmospheric scientists partner to track typhoons' seismic footprints
16.02.2018 | Princeton University
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
21.02.2018 | Life Sciences
21.02.2018 | Life Sciences
21.02.2018 | Materials Sciences