The technical excursions will take place on Wednesday 23.10.2024 from 9:00 to 13:30. Transportation will be from the front of the Patria Hotel. The number of participants for each excursion is limited to 40 persons. The excursion is only open to participants of the Tunnels and Underground Structures 2024 Conference.
Excursion 1
D1 motorway Hubová - Ivachnová
Čebrat tunnel - installation of technological equipment
Excursion 2
Expressway R4 Prešov - northern bypass, II.stage
Okruhliak tunnel - stamping of tunnel tubes
Excursion 3
Branisko motorway tunnel in operation and the operator's workplace of SSÚD Beharovce (the excursion will take place during the planned shutdown)
Registration for excursions can be found in the menu bar. You can unsubscribe from the excursion by sending an email to info@taps2024.sk
Please wear sturdy shoes and clothing, personal protective equipment will be provided by the building.
The Čebrať Tunnel is a part of the D1 motorway section Hubová - Ivachnová. The tunnel has two tunnel tubes with a length of
3680 m and was conventionally mined according to the principles of the New Austrian Tunnelling Method.
During the first years of construction, significant geotechnical problems appeared in the route of the motorway outside the tunnel - landslides, which significantly affected the construction of the tunnel in terms of their extent. The additional identification of a large landslide area with shear areas at great depth resulted in the rerouting of the motorway and its diversion into the mountainside with the extension of the tunnel to its current length. The Čebrať tunnel and the Višňové tunnel will be the first Slovak twin-tube motorway tunnels with a length of over 3 km with longitudinal ventilation.
Currently, the tunnel is undergoing works on the implementation of the roadway with a cement concrete cover, as well as the installation of technological equipment in both tunnel tubes.
After the successfully completed and currently operating Prešov and Bikoš tunnels, the construction of the 1913 m long Okruhliak tunnel started in September 2023. It is thus the third road tunnel on the bypasses of the third largest Slovak city Prešov. The tunnel is part of the proposed expressway
R4 Prešov - northern bypass, stage II, km 4.3-14.5 - which is part of the north-south transport connection by the expressway in the section of the state border Slovakia/Poland - Vyšný Komárnik - Milhosť - state border Slovakia/Hungary.
Both tunnel tubes of the Okruhliak tunnel are currently being coined from the western portal. The expected conditions of the rock mass include the occurrence of swelling minerals in the route of the tunnel tubes.
The Branisko Tunnel was the first Slovak motorway tunnel put into operation in 2003. With a length of 4975 m it is still the longest motorway tunnel in Slovakia. The tunnel is located on the D1 motorway, in the section between the towns of Poprad and Prešov.
The tunnel is built and operated with one tunnel tube with two-way traffic. The safety system of the tunnel is supplemented by a parallel escape tunnel connected to the tunnel tube by transverse
connections. Due to the length of the tunnel and the two-way traffic, a semi-transparent ventilation system with smoke extraction in case of fire through flaps in the intermediate tunnel was designed for the tunnel. A ventilation shaft located approximately 2 km from the western portal is used to extract polluted air or smoke in the event of a fire.
The excursion will also include a visit to the integrated control room for the Branisko Tunnel, located at the Beharovce Administration and Maintenance Centre.