Numerical Simulation in Tunnelling by Univ. -Prof. Dipl. Ing. Dr. Gernot Beer (auth.), Univ.

By Univ. -Prof. Dipl. Ing. Dr. Gernot Beer (auth.), Univ. -Prof. Dipl. Ing. Dr. Gernot Beer (eds.)

For a long time the Austrian tunneling has demanded that examine is urgently required to set up a theoretical foundation for the recent Austrian TUnneling process and to help web site engineers within the frequently tricky everyday judgements. particularly it used to be felt that numerical types have to be more desirable significantly with a purpose to be ready to act as precious instruments in predicting soil/rock mass habit in the course of tunneling. the mandatory development not just refers back to the caliber of the versions but additionally to their ease of use. so long as an skilled modeler is needed to spend days in getting ready the enter and in reading the consequences the types aren't priceless on the tunnel web site. it really is heartening for that reason team of scientists in Austria has come jointly to aim to take on this difficult job. The initiative has been supported in a few methods through the Austrian tunneling undefined. All Aus­ trian businesses linked to tunneling despatched representatives to the fellow­ agement advisory board, which ensured that the learn conducted within the venture, used to be of gain to the undefined. The Austrian Geomechanics Society backed the undertaking with a substantial volume, which used to be customarily used to hide website expenditures. HL-AG and OSAG, in addition to the joint ventures allowed entry to tunnel websites thereby making it attainable to check new developments.

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2. Dialog for input of elements II OK I T. Reichl, B. Mathis t , G. 2 Input of cross sections c-I II OK "~""'''''Fl Fig. 3. Dialog for input of cross sections Fig. 3 shows the dialog for input of cross sections. Cross sections can be added in the same way as axes therefore the dialog looks almost the same. The way cross sections are defined in tunnelling is shown for example in Chap. 6 Fig. 3. A cross section consists of elements (arcs). Each arc is defined by its centre, radius and start -end angle.

For this purpose a commercial camera system was tested that has come onto market in 2000. The camera follows the same principle as those built for the prototype system, but it is faster and lighter which make a car carrying the system no longer a requirement. The imaging system therefore is more flexible and can be incorporated into the working cycle on site easier. Fig. 25 shows an image from a site test taken at the Unterwald tunnel which is part of the railway track Amstetten-Tarvis (Many thanks to OBB, PAT, OSTU Stettin, Geodata).

Adding new elements can be achieved with the dialog shown in Fig. 2. There are three possibilities for the definition, one for a line and two for arcs. Axes are defined as a polyline, so the end point of the previous element is the start point of the next element. The dialog automatically fills in the end point of the previous element as the starting point for the next element. It is also possible to import the information about axes from a DXF file. 0 Eod. < 10M AnIiIo ()" P _ l 0 ARC. 5.... 10R 10MS'~21O"E~ o-P_O Fig.

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