Tunnel Day

    The Austrian National Committee of the ITA (International Tunneling Association) organizes the Austrian Tunnel Day in conjunction with the Geomechanics Colloquium. The Tunnel Day focuses on presenting the latest state of the art of Austrian and international engineering concepts in design and construction.

    Recent creative developments in design, construction, and operating methods in tunnelling are presented.

    The application of those new design and construction concepts will promote further innovation in future tunnelling projects.

    14th Austrian Tunnel day 2024

    October 09th, 2024

    On Wednesday, October 09th, 2024, the 14th Austrian Tunnel day will take place.

    The sessions topics are:

    • 50 years of ITA
    • Major international projects 
    • Digitalization in tunnel construction
    • Field reports on new contract models
    • Presentation of new guidelines and standards for tunnel construction

    Participation is only possible in combination with the Geomechanics Colloquium.

    More Information

    Submission Innovation price

    Here you can find information about participating in the competition: (only availabe in german)

    Innovationspreis Tunneltag

    Dinner at the fortress

    In the evening, a dinner will be held in the Hohensalzburg Fortress for the participants of the Tunnel Day (costs € 48 per person).

    Geomechanics Colloquium

    The annual Geomechanics Colloquium has developed as an important meeting point for experts in Central Europe. The event with the associated exhibition usually attracts over 900 participants annually, making it one of the largest annual events in the field of geomechanics worldwide.


    The 73rd Geomechanics Colloquium 2024 will be organized together with the 14th Austrian Tunnel Day 2024. You will find all the information shortly.


    Click here to go directly to the ISRM Congress and Geomechanics Colloquium 2023 page!

    73rd Geomechanics Colloquium - Hermann Brandecker Colloquium 2024

    October 10th-12th, 2024

    This colloquium will be held as a hybrid event. You can book the colloquium on site or as an online version. The participant fees of the physical colloquium automatically includes the online version. All contributions are recorded and can be accessed at a later point in time.

    The sessions topics are:

    • Stability of rock slopes
    • Geothermal energy
    • Assessment and repair of infrastructure
    • Climate change-related natural hazards


    Important dates

    • Submission of abstracts 01/31/2024 For the Geomechanics Colloquium, the deadline has been extended to 29.2.24
    • Submission paper: 06/15/2024
    • Activation of registration: Middle/end of June
    • from August 1st higher registration fees

    Here you can find the programm of the Geomechanics Colloquium

    Program Geomechanics Colloquium

    Submission of Contribution

    Generelle Information zum virtuellen Geomechanik Kolloquium

    Alle Vorträge werden als LIVE-Stream abgehalten. Vortragende, Teilnehmer und Halbtagsvorsitzende sind live.

    Fragen können via Chat von den Teilnehmern gestellt werden. Diese werden von den Halbtagsvorsitzenden koordiniert und an den Vortragenden mündlich gestellt, um diese nach dem Vortrag zu beantworten.

    Der Einstieg in das Webinar erfolgt über unsere Webseite und muss über die Browser Chrome oder Firefox erfolgen um eine gute Funktionalität zu gewährleisten.

    Nach der Anmeldung erhalten die Teilnehmer Ihre persönlichen Zugangsdaten (Anmeldecode), mit welchen sie sich ins Webinar einloggen können, sobald dieses freigeschalten ist.

    Alle Vorträge werden gespeichert und bleiben für angemeldete Teilnehmer (mit Zugangscode) auch nach dem Live-Stream noch bis Ende des Jahres abrufbar (nur Ton und Präsentation).

    Die Proceedings (Geomechanics and Tunnelling - Heft 5 und Heft 6 - für Miglieder inkludiert) zum virtuellen Geomechanik Kolloquium 2020 können gegen Aufpreis zusätzlich bestellt werden.

    Program survey

    The Tunnel Day and the Geomechanics Colloquium will take place from Wednesday, October 12th, 2022 to Saturday, October 15th, 2022

    Programm zum Downloaden

    Hier können Sie das Programmheft downloaden:

    More Information


    We are pleased to invite the participants and their companions to a concert on Thursday, October 10, 2024, as part of the congress, supported by the City and State of Salzburg, at the Kollegienkirche (Universitätsplatz 20).

    The concert starts at 7 p.m.

    You will find the invitation in your conference bag.

    Congress dinner

    After the chamber concert, the Austrian Society for Geomechanics invites all participants and their accompanying persons to the congress dinner in the Stieglkeller Salzburg.

    Earliest entry: 7 p.m.

    Address: Festungsgasse 10 (after the funicular to the fortress), 5020 Salzburg

    Field trip on Oct. 15th, 2022


    VERBUND Hydro Power GmbH (VHP) started construction on the Limberg III power plant in 2021.

    Preliminary Program:

    • 08:00  Departure Salzburg Congress
    • 09:30  Arrival at the main construction camp Limberg III
    • 09:45  Project presentation and site inspection upper stage (Drossen)
    • 12:00  Lunch Break
    • 13:00  Site inspection main stage (Limberg)
    • 14:30  Departure main construction camp Limberg III
    • 16:00  Arrival at Salzburg Congress


    The project, which was approved in 2017, is a pumped storage power plant with a total capacity of 480 megawatts. Like Limberg II, which was put into operation in 2011, it will be constructed entirely underground between the two existing reservoirs of the Mooserboden (final level 2,036 m) and Wasserfallboden (final level 1,672 m).

    These two reservoirs with a total capacity of 160 million m³ will be used as upper and lower basins for the pump turbine operation to generate electricity. This is an addition to the existing power plants Limgerg I and Limberg II which are already in operation

    The new headracetunnel starts at the intake of the Mooserboden reservoir and reaches the pressure shaft after 3.7 km. After a length of 600 m the pressure shaft leads via two distribution pipes into the underground power station, which is located underneath the Limberg dam. The power station consists of a machine chamber with two 240 MW hydroelectric sets and a transformation chamber, connected via two generator dissipation tunnels. After the turbines the water is returned  to the Wasserfallboden reservoir via a 613 m long tailrace tunnel.

    In the powerhouse cavern, two hydroelectric sets generate electricity, each consisting of a reversible Francis pump turbine and a generator. The energy is dissipated with a nominal voltage of 380 kV from the cavern system by means of a gas insulated line and is connected to the existing energy dissipators.  

    Upon completion, Limberg III will be a power plant whose design is tailored very specifically to the future needs of the energy transition. Special machine sets with variable speed-controlled pump turbines will be used that are able to react with extreme flexibility to the increasing need for balancing and controlling energy in the grid. Given the increasing requirements caused by the expansion of volatile forms of energy generation, these are important services for grid stability – one of the main prerequisites for a safe and affordable electricity supply.

    In addition to being constructed underground, and thus out of sight, the overall project also encompasses a large number of ecological measures. A special highlight is the construction of the 24 hectare European conservation area “Alpine Alluvial Land Drossen”, which extends into the Drossen ravine. Below the dam, a project will also be implemented that aims at eliminating traces of the construction period of the 1950s by means of land restoration.

    Technical Facts

    • Medium head 365 m
    • Number of pump turbines 2
    • Pump turbine capacity 2 x 240 MW
    • Flow rate per pump turbine 72 m3/s
    • Height of hydroelectric generating set 18,5 m

    Photos: © VERBUND

    Limberg III

    Sight Seeing Programm

    On Thursday, October 8th, we are offering accompanying persons the following social program:

    The Attersee is the largest lake in the Salzkammergut and, thanks to its turquoise blue water of drinking water quality, is one of the most popular bathing lakes in Austria. In addition to various sports opportunities, the region also offers numerous  attractions.

    First, our tour leads to the beautiful late Gothic parish church of Gampern, where you can admire one of the three most famous Gothic winged altars in Upper Austria.

    Then we go to Seewalchen where we visit the Gexi Tostmann traditional costume museum.

    Afterwards we enjoy a walk on the promenade with a view of the lake, passing Villa Paulick, a historic summer villa that is a listed building.

    A visit to the Klimt center in Schörfling, a walk on the Klimt theme trail, in the Klimt garden and a boat trip on Lake Attersee open up the Klimt trails and its impressive motifs on land and from the sea side.

    Of course, lunch as well as coffee and cake are also provided.


    Alle Beiträge werden dieses Jahr in der vom Vortragenden gewählten Sprache abgehalten. Eine Simultanübersetzung findet nicht statt. In den Proceedings finden Sie die Beiträge jeweils in englischer und deutscher Sprache.


    The conference languages for the tunnel day and the geomechanics colloquium are German and English.

    Simultaneous translations are available.

    You will find the headsets to the left of the entrance to the "Europa hall".

    More Information

    The registration form will be open in July!


    Proposed Fees Regular Member Retiree Student PhD Student
    GEOMECHANICS COLLOQUIUM (Early bird registration 01.03.2024 - 31.07.2024)  * 550 € 450 € 250 € 100 € 550 €
    GEOMECHANICS COLLOQUIUM (Standard price 01.08.2024 - 30.09.2024)  * 600 € 500 € 280 € 125 € 600 €
    GEOMECHANICS COLLOQUIUM (Walk in price 01.10.2024 - 15.10.2024)  * 650 € 550 € 330 € 175 € 650 €
    VIRTUAL COLLOQUIUM (Early bird registration 01.03.2024 - 31.07.2024)  * 190 € 150 € 125 € 0 € 190 €
    VIRTUAL COLLOQUIUM (Standard price 01.08.2024 - 30.09.2024)  * 220 € 180 € 150 € 0 € 220 €
    VIRTUAL COLLOQUIUM (Walk in price 01.10.2024 - 15.10.2024)  * 270 € 230 € 200 € 50 € 270 €
    TUNNEL DAY (Early bird registration 01.03.2024 - 31.07.2024)  * 185 € 185 € 185 € 30 € 185 €
    TUNNEL DAY (Standard price 01.08.2024 - 15.10.2024)  * 185 € 185 € 185 € 30 € 185 €
    EXCURSION  * 100 € 100 € 100 € 100 € 100 €
    DINNER FORTRESS  ** 48 € 48 € 48 € 48 € 48 €
    VIRTUAL TUNNEL DAY (Early bird registration 01.03.2024 - 31.07.2024)  * 100 € 100 € 100 € 0 € 100 €
    VIRTUAL TUNNEL DAY (Standard price 01.08.2024 - 30.09.2024)  * 100 € 100 € 100 € 0 € 100 €
    VIRTUAL TUNNEL DAY (Walk in price 01.10.2024 - 15.10.2024)  * 150 € 150 € 150 € 20 € 150 €
    EXCURSION B  * 100 € 100 € 100 € 100 € 100 €
    * incl. 10% VAT
    ** incl. 20% VAT

    The proceedings are printed in issue 5 of our association magazine "Geomechanik und Tunnelbau". Members receive this automatically.

    The Austrian Tunnel Day can only be booked in combination with the Geomechanics Colloquium!

    The price includes:

    The participation fee includes participation in the conference and the exhibition, the conference bag, the lunch buffet, the congress dinner and the chamber concert on Thursday.

    "Students" (reduced participation fee) are persons under the age of 26 years, without a regular salary – except doctoral students! The certificate of studies has to be added.

    Your name badge (participant card) and all other conference documents are only available at the conference desk in the congress center (NO participant documents will be sent!).


    The Geomechanics Colloqium and the Tunnel Day will be held in the congress center "Salzburg Congress" (Auerspergstraße 6, 5020 Salzburg, entrance Mirabellgarten), which is located close to the city center.

    Salzburg is known worldwide for its beautiful old town and its cultural offerings.

    All lectures will be held as a LIVE stream. Lecturers, participants and session chairs are live.

    Questions of participants can be asked via chat. These are coordinated by the session chairmen and  passed on orally to the lecturer, to be able to respond them after the presentation.

    The webinar can be started via our website and must be done using the Chrome or Firefox browser to ensure good functionality.

    After registration, the participants will receive their personal access data (registration code) with which they are able log in to the webinar as soon as it is activated.

    All presentations are saved and remain available for registered participants (with access code) even after the live stream until the end of the year (sound and presentation only).

    Proceedings (Geomechanics and Tunneling - Issue 5 and Issue 6 - for members included) of the Virtual Geomechanics Colloquium 2020 can be ordered additionally for small fee.

    The geomechanics colloquium and the tunnel day will be held in the "Salzburg Congress" congress center (Auerspergstraße 6, 5020 Salzburg, Mirabellgarten entrance), which is located near the city center.

    Salzburg is a household name worldwide due to its beautiful old town and cultural offerings.

    Download Program

    Here you can download the Conference Programm

    More Information


    All contributions will be held this year in the language chosen by the lecturer. There is no simultaneous translation. In the proceedings you will find the articles in English and German.


    The organizer of the Geomechanics Colloquium

    Austrian Society for Geomechanics

    Innsbrucker Bundesstraße 67
    5020 Salzburg
    Tel: +43 662 875519
    Mobil: +43 664 8128990
    E-Mail: salzburg@oegg.at
    Web: oegg.at

    More informationen tho the society you can find here.