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.

12th Austrian Tunnel day, 10/13/2021

On Wednesday, October 13th, 2021, the 12th Austrian Tunnel day will take place.

The sessions topics are:

  • Special challenges at large construction sites New regulations for tunnelling
  • Innovation and processing of tunnel construction projects
  • Presentation Innovation Award Tunneling Deadline: 07/31/2021
  • Handling of tunnelling projects - Future ways

Participation is only possible in combination with the Geomechanics Colloquium.

Here you can find the program of the Tunnel Day.

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 € 45 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.

70th Geomechanics Colloquium / Georg-Michael Vavrovsky Kolloquium

October 14th-16th, 2021

This year's 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:

  • Dealing with geological risk
  • New developments in mechanized tunnelling
  • Innovative exploration methods ahead of the face​​​​​​​
  • Urban tunnelling

Important dates

  • Submission of abstracts (01/31/2021) extended to February 15, 2021!
  • Submission paper:  (06/15/2021)
  • from August 9th higher registration fees

Here you can find our first announcement

More Information

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 13th, 2021 to Saturday, October 16th, 2021

Programm zum Downloaden

Hier können Sie das Programmheft downloaden:

More Information

Chamber concert

The state and city of Salzburg support us to invite the participants and their accompanying persons to a chamber concert on Thursday evening.

The invitation to the chamber concert will be enclosed with the conference documents.

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

Excursion on 10/16/2021

Kühtai storage plant

With a usable storage capacity of about 31 mio m³, the new Kühtai reservoir is about half the size of the existing Finstertal reservoir. The dam is designed as a natural stone infill dam with a central earth core and a height of 113 m from the original valley floor to the dam crest. The full reservoir level is at 2,140 m above sea-level. All of the material used for the infill dam is extracted on site from the future reservoir and the tunnel excavation.

Similar to the two existing dams, natural stone and structural elements will be used for the airside dam surface to blend in the structure with the natural surroundings in the best possible way.


The Kühtai 2 power station with its headrace channel – a tunnel 4.5 m in diameter – connects the new Kühtai reservoir with the existing Finstertal reservoir. The power station is built completely underground in a rock cavern and is designed for pumped storage operation. Two pump turbines form the heartpiece of the station. These turbines are reversible, meaning their function and direction of rotation can be turned around: in turbine operation, up to 90 m3/s of water are flowing in the headrace channel from the Finstertail reservoir to the Kühtai reservoir with the turbine driving the generator, causing the generator to feed electricity into the grid.


The stream adduction – a tunnel 4.2 m in diameter and 25.5 km in length – with its six water intakes opens up an additional catchment area in the middle, eastern part of the Ötztal valley and the head of the Stubaital valley. The harnessed water is fed into the Kühtai reservoir at a slight gradient. Due to local conditions, two of the water intakes are situated slightly below the stream adduction; a pumping station is used to raise the water drawn off there to the level of the adduction.


As a general principle, the amount of water drawn off at the intakes conforms to ecologically compatible levels. Natural flow dynamics are maintained even if at a lower level. In the winter months no water is drawn off at all.



  • 08:00 a.m.     departure from Salzburg Congress
  • 11:00 a.m.     Arrival at the power house / visitor center in Silz
  • 11:05 a.m.     Project explanation and inspection of the underwater pool
  • 12:00 a.m.     Ascent to Kühtai via Haimingerber
  • 12:30 noon    Lunch in the lunchroom at the construction site in Kühtai
  • 01:30 p.m.     Inspection of the dam construction site and various drives
  • 03:00 p.m.     departure towards Salzburg
  • 06:00 p.m.     Arrival at the Salzburg Congress


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 Members Retirees Students
GEOMECHANICS COLLOQUIUM (Early bird registration 01.03.2021 - 08.08.2021) * 440 € 360 € 200 € 75 €
GEOMECHANICS COLLOQUIUM (Standard price 09.08.2021 - 30.09.2021) * 490 € 400 € 225 € 100 €
GEOMECHANICS COLLOQUIUM (Walk in price 01.10.2021 - 15.10.2021) * 540 € 450 € 275 € 150 €
VIRTUAL COLLOQUIUM (Standard price 01.03.2021 - 30.09.2021) * 150 € 120 € 100 € 0 €
VIRTUAL COLLOQUIUM (Last Minute 01.10.2021 - 31.12.2021) * 170 € 150 € 120 € 50 €
TUNNEL DAY (Early bird registration 01.03.2020 - 08.08.2021) * 165 € 165 € 165 € 30 €
TUNNEL DAY (Standard price 09.08.2021 - 15.10.2021) * 165 € 165 € 165 € 30 €
EXCURSION  * 80 € 80 € 80 € 80 €
VIRTUAL TUNNEL DAY (Standard price 01.03.2021 - 30.09.2021) * 100 € 100 € 100 € 0 €
VIRTUAL TUNNEL DAY (Last Minute 01.10.2021 - 31.12.2021) * 100 € 100 € 100 € 20 €
* 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!).


Die Teilnahmegebühr beinhaltet die Teilnahme an der Tagung und der Fachausstellung, die Tagungstasche, das Mittagsbuffet, das Kongressdinner sowie das Kammerkonzert am Donnerstag.

Als "Studenten" (ermäßigte Teilnahmegebühr) gelten nur Personen unter 26 Jahren, welche kein geregeltes, einkommensteuerpflichtiges Einkommen beziehen. Doktoratsstudenten sind von der Ermäßigung ausgenommen.

Ihr Namensschild (Teilnehmerkarte) wowie alle anderen Tagungsunterlagen erhalten Sie ausschließlich am Tagungsschalter im Kongresszentrum (es werden KEINE Teilnehmerunterlagen verschickt!).

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.


An technical field trip will take place on Saturday, October 10th.

More information soon.


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.

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 known worldwide for its dreamlike old town and the cultural offer.