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Service building D3 tunnels Svrčinovec and Poľana

D3 Svrčinovec–Skalité consortium
Safe operation of the Svrčinovec and Poľana tunnels on the D3 motorway at the Slovakian–Polish border requires appropriate buildings at the tunnel portals. These buildings include operation and safety equipment, and are located to the side in front of the western portal of each tunnel. The Svrčinovec service building also acts as a permanently manned support centre for operational management and monitoring of both tunnel systems. The Svrčinovec tunnel service building is a two-storey, solid building, accessible from the northwest and southwest sides via an access route from the I/11 road. The Poľana tunnel service building is primarily a single-storey building, but has a second storey in some parts.
Adjustments to the construction project, detailed design, plans for the structure built, instruction manual.
Service building D3 tunnels Svrčinovec and Poľana

Ovčiarsko and Žilina motorway tunnels

Dopravoprojekt a.s. Bratislava
The D1 motorway from Bratislava to Žilina to Kosice up to the Ukrainian border is Slovakia’s most important east–west connection and a key European corridor. Two tunnels are being built on the stretch from Hričovské Podhradie to Lietavská Lučka near Žilina: the Ovčiarsko tunnel with a length of 2,360 metres and the Žilina tunnel with a length of 690 metres. Both tunnels are in the Carpathian Flysch Belt, a difficult geological environment. Tunnel driving for the Žilina tunnel is especially demanding because the rock is granular, unstable and contains water. For that reason, the tunnel floor was drained and reinforced with concrete injections. The tunnels consist of two tunnel tubes with two lanes each. They were driven using mining construction with the new Austrian tunnelling method (NATM) using shotcrete and dual formwork.
Detailed design, plans for the structures built.
Ovčiarsko and Žilina motorway tunnels

Fire extinguishing water supply for the Svrčinovec and Poľana tunnels

D3 Svrčinovec–Skalité consortium (VÁHOSTAV-SK – Doprastav – STRABAG – Metrostav)
In order to ensure a supply of fire extinguishing water to both tunnels, fire extinguishing water systems were installed according to national regulations. Both fire extinguishing water systems include fire extinguishing water tanks, pressure boosting units and controllers, as well as fire extinguishing water pipelines with portal and tunnel hydrants. The fire extinguishing water pipeline in the Svrčinovec tunnel was designed as a DN 125 ductile cast iron “dry pipeline” with thermal insulation. The fire extinguishing water pipeline in the Poľana tunnel was designed as a DN 150 ductile cast iron “wet pipeline” with trace heating and thermal insulation.
Changes to the construction project, detailed design, plans for the structure built, instruction manual.
Fire extinguishing water supply for the Svrčinovec and Poľana tunnels

Repair of the national highway A3 MurgWalenstadt section/Switzerland

Basler & Hofmann AG, Federal Roads Office (FEDRO)
The Murg–Walenstadt section of the motorway is located in a topographically challenging area along the Lake Walen. The section cuts through the southern side of the valley and comprises five tunnels, three large viaducts and numerous engineering structures such as bridges, retaining walls, protective structures and noise protection structures. The repair work is to be carried out at night, thereby enabling full capacity for traffic during the day.
Intervention project – plan processing Submission – plan processing
Repair of the national highway A3 MurgWalenstadt section/Switzerland

Overall renewal of the A6 junction in Thun North, Switzerland

Basler & Hofmann AG / Federal Roads Office (FEDRO)
The 9.3-kilometre-long stretch of the A6 motorway between Kiesen and Thun South, including the Thun North motorway junction, had to be completely renovated. In the course of the overall renewal, the existing carriageway made of concrete with a bituminous surface was removed and replaced with a new bituminous road structure. The motorway drainage system was also modernised and the existing oil detention basins were renovated to meet today’s environmental requirements. The overall renewal was carried out without road closures.
Intervention project – plan processing, submission – plan processing
Overall renewal of the A6 junction in Thun North, Switzerland

East precut for the Žilina tunnel

Dopravoprojekt a.s.
The Žilina two-tube tunnel is part of the D1 motorway, which runs from Bratislava to Košice in eastern Slovakia. In preparation for tunnel driving from the east, the precut for the eastern portal had to be created. Once the tunnel tubes were completed, retaining walls were built and compactly backfilled. Extensive anchors were added and soil nailing had to be completed in order to stabilise the embankment. The nailed areas of the embankment above the retaining wall were sealed with permanent vegetation. The portal walls will be built using gabion supporting structures (cages filled with rocks), and the side walls of the cut will be constructed as tie-back anchored retaining walls.
Adjustments to the construction project, detailed design, plans for the structure built
East precut for the Žilina tunnel

Fire extinguishing water supply for the Ovčiarsko and Žilina tunnels

Ovčiarsko consortium (Doprastav – STRABAG – VÁHOSTAV-SK – Metrostav)
In order to ensure a supply of fire extinguishing water to both tunnels, fire extinguishing water systems are being installed according to national regulations. Both fire extinguishing water systems include fire extinguishing water tanks, pressure boosting units and controllers, as well as fire extinguishing water pipelines with portal and tunnel hydrants. The fire extinguishing water pipeline in the Žilina tunnel is designed as a DN 125 ductile cast iron “dry pipeline” with thermal insulation. The fire extinguishing water pipeline in the Ovčiarsko tunnel is designed as a DN 150 ductile cast iron “wet pipeline” with trace heating and thermal insulation.
Changes to the construction project, detailed design, plans for the structure built, instruction manual.
Fire extinguishing water supply for the Ovčiarsko and Žilina tunnels

Bikoš road tunnel

R4 Prešov engineering consortium (lead management: HBH Projekt spol. s.r.o. Brno)
The Bikoš tunnel is one of two tunnels planned on the northern bypass road from Prešov as part of the R4 dual carriageway. The tunnel will be about 1.15 kilometres long and pass through the hill of the same name in the municipality of Veľký Šariš. The two-tube tunnel will consist of a mined section and two cut-and-cover sections at the portals. The mined part of the tunnel tube will be driven in stages with horizontal segmentation of the excavation (roof arch, bench, floor).
Construction project
Bikoš road tunnel

Laliky road tunnel

Doprastav, a.s. Bratislava
The 678-metre-long single-tube tunnel is part of the Polish S69 dual carriageway between Bielsko-Biała and Zwardoń. It is about 10 kilometres from the Slovakian–Polish border. The Laliky tunnel is the first tunnel in Poland built with mining construction, as well as the longest Polish tunnel. It was driven with the new Austrian tunnelling method (NATM) using shotcrete. The tunnel tube has two formways with an outer arch made of shotcrete and an inner lining made of reinforced concrete. The two-lane tunnel tube with two-way traffic is connected to an escape and rescue tunnel by four cross cuts.
Construction project
Laliky road tunnel

Renewal of the restraint systems on the R1 Šášovské Podhradie–Zvolen

Národná diaľničná spoločnosť, a.s. (national motorway company NDS) STRABAG s.r.o.
In the course of the nationwide project to improve traffic safety on the motorways and dual carriageways, the existing restraint systems were replaced and new elements were added. The renewal included steel and concrete equipment to protect against vehicle impact in accordance with the EN 1317 standard. Mobile protection equipment was installed at two points as an emergency opening for crossing over the central reservation.
Tender planning, detailed design, plans for the structures built.
Renewal of the restraint systems on the R1 Šášovské Podhradie–Zvolen

East Suurstoffi district in Rotkreuz / Switzerland

Basler & Hofmann AG, General planner consortium BGP Bob Gysin + Partner AG and Sulzer+Buzzi Baumanagement AG
Three new buildings are to be erected for Zug Estates AG on construction site F of the former industrial area. The lower floors of the up to 40-metre-high buildings will house commercial and service areas, while the upper floors are intended for residential space. The structure is a flexible frame construction, and all dividing walls are of lightweight construction and non-load-bearing. Basler & Hofmann is responsible for the pile foundations and structural systems of the buildings from preliminary study to implementation.
Drafting for the detailed design (formwork and reinforcement plans)
East Suurstoffi district in Rotkreuz / Switzerland

Bridge maintenance on the A1 motorway from Zurich East to Effretikon, Switzerland

Basler & Hofmann AG / Federal Roads Office (FEDRO)
The 12-kilometre stretch of the A1 motorway from the Zurich East interchange to Effretikon is one of the most heavily used stretches of motorway in Switzerland with more than 110,000 vehicles per day. After over 40 years of use, this major artery of the Zurich metropolitan area will now be restored by 2020. A new, low-noise tarmac will be laid for improved noise protection, and 25 bridges, ramps, overpasses and underpasses will be renovated and reinforced.
Intervention project – drafting services
Bridge maintenance on the A1 motorway from Zurich East to Effretikon, Switzerland

Ulvin rail tunnel, Norway

Basler & Hofmann AG Zurich/Norconsult AS Sandvika (Norway)
The 3,985-metre-long Ulvin rail tunnel is part of the Norwegian E6-Dovrebanen project. This project includes expansion of the E6 motorway and the two-track railway line north of Oslo between Minnesund and Stange. The two-track Ulvin tunnel eliminates the obstacles of the hills near Ulvin and Morskogen along Lake Mjøsa. The tunnel is designed for transporting passengers and freight at a maximum line speed of 200 kilometres per hour. The tunnel was built with an inner lining made of in-situ concrete – a first for Norway’s railways
Tender planning consultations Detailed design – reinforcement plans for the inner lining
Ulvin rail tunnel, Norway

Svrčinovec and Poľana road tunnels

D3 Svrčinovec–Skalité consortium (VÁHOSTAV-SK, Doprastav, STRABAG, Metrostav)
In the course of expanding half of the D3 motorway at the important new north–south axis between Žilina and the Polish border, the two Svrčinovec and Poľana single-tube tunnels with two-way traffic are being built on the stretch from Svrčinovec to Skalité. The 410-metre Svrčinovec tunnel is to the north of the village it is named after. The next tunnel, Poľana, is 893 metres long and near the village of Skalité. The tunnel rock primarily consists of clay and sandstone layers. The tunnels will be driven using mining construction with the new Austrian tunnelling method (NATM) using shotcrete and dual formwork. Each tunnel is equipped with an escape tunnel and the appropriate operation and safety facilities.
Changes to the construction project, detailed design, plans for the structures built.
Svrčinovec and Poľana road tunnels

Renovation of the Sekule rest stop on the D2 motorway

Národná diaľničná spoločnosť, a.s. (national motorway company PLC)
The rest stop on the left side of the D2 motorway between Kúty and Malacky was in a poor technical and aesthetic condition. In the course of the repairs, the paved surfaces and roads were renewed, and the drainage facilities were renovated and expanded. The open spaces were designed as relaxing areas with new plantings, seats, playgrounds and lighting in keeping with the motorway operator’s uniform standard.
Detailed design, plans for the structures built.
Renovation of the Sekule rest stop on the D2 motorway

Ambassador House in Zurich / Switzerland

Basler & Hofmann AG, Stücheli Architekten AG, Halter AG Gesamtleistungen
Northern Zurich is now considered an up-and-coming new district. The eye-catching 1980s Ambassador House in northern Zurich was stripped down to the shell construction and extensively renovated. The highly segmented building was harmonised and restructured. At a length of 165 metres, a height of 30 metres and over 38,000 square metres of office space, the Ambassador House is one of the largest business premises in Switzerland. Basler & Hofmann AG was contracted to plan the support structures for all conversion measures on the building, including partial demolition.
Drafting for the detailed design (formwork and reinforcement plans)
Ambassador House in Zurich / Switzerland

Repair of A1 Zurich East–Effretikon section

Basler & Hofmann AG / Federal Roads Office (FEDRO)
With 110,000 vehicles a day, the section of national road between the Zurich East interchange and Effretikon is one of the most heavily used stretches of motorway in Switzerland. In order to optimise traffic, slip roads are to be extended, markings and signals replaced and speed harmonisation and a hazard warning system implemented. Over the medium term, the hard shoulders in both directions are to be converted into traffic lanes.
Intervention project – plan processing
Repair of A1 Zurich East–Effretikon section

Excavations – access tunnel and east precut for the Považský Chlmec tunnel

Eurovia SK a.s, Hochtief CZ a.s.
The Považský Chlmec tunnel is part of the D3 motorway northwest of the city of Žilina. During preparations for tunnel driving, two precuts (west and east) and an excavation for the access tunnel in the middle of the tunnel were made. The 20-metre-high east precut was stabilised with shotcrete and soil nailing, and anchors were installed as necessary. Pit lining with soil nailing and soldier pile walls was used for the access tunnel excavation.
Independent structural analysis – verification of the structural data
Excavations – access tunnel and east precut for the Považský Chlmec tunnel

Turecký vrch rail tunnel

REMING Consult a.s. Bratislava
The Turecký vrch rail tunnel is the most important underground structure along the 59-kilometre stretch between Nové Mesto nad Váhom and Púchov. This section will be expanded for a travel speed of 160 kilometres per hour in the course of work on the east–west rail corridor. The increased designed speed requires changes to the track layout for the two-track stretch between the Nové Mesto nad Váhom and Trenčianske Bohuslavice stations. A new tunnel of the same name will pass under the Turecký vrch mountain range for a distance of 1,775 metres. It is the first new rail tunnel to be built in Slovakia in 50 years.
Detailed design – sealing, inner lining and interior construction, instruction manual, tunnel safety documentation with resource planning – emergency plan.
Turecký vrch rail tunnel

Concrete carriageways for the Svrčinovec and Poľana tunnels

D3 Svrčinovec–Skalité consortium
During construction of the new Svrčinovec and Poľana single-tube tunnels on the D3 motorway to the Slovakian–Polish border, a non-reinforced concrete carriageway was installed. The superstructure consists of a 26-centimetre-thick concrete surface, an 18-centimetre-thick layer of hydraulically bonded granulate and a protective layer of gravel. The concrete surface is divided with three-millimetre-wide transverse and longitudinal joints. The joints were cut into the freshly hardened concrete surface. The transverse joints are reinforced with round steel wall plugs, and the longitudinal joints are reinforced with corrugated steel concrete anchors. The carriageway surface was processed before the concrete had hardened to give it a non-slip exposed-aggregate concrete structure.
Changes to the construction project, detailed design, plans for the structure built.
Concrete carriageways for the Svrčinovec and Poľana tunnels

Retaining wall for the Poľana and Svrčinovec tunnel precuts

D3 Svrčinovec–Skalité consortium (Doprastav – STRABAG – VÁHOSTAV-SK – Metrostav)
The Poľana tunnel is part of the D3 motorway that connects Žilina to the border crossing to Poland in northern Slovakia. The two tunnel portals were stabilised with supporting structures made of gabions (cages filled with rocks). For the sections of slope on the sides, gabion gravity retaining walls were used, while the front sides were built as geosynthetic-reinforced supporting structures with gabions on the face. Four-metre-long uniaxial geogrids made of polyester were used for reinforcement. A tie-back anchored retaining wall was built to stabilise the embankment of the cut formed in front of the eastern portal of the Poľana tunnel. It was completed in stages, during which tie-back anchored elements with prestressed strand anchors and reinforced concrete ribs were produced. Cladding made of gabions was used for the infill.
Adjustments to the construction project, detailed design, plans for the structure built, instruction manual.
Retaining wall for the Poľana and Svrčinovec tunnel precuts

D1 Bôrik tunnel service building

IS – Marti Contractors consortium
Two operations centres were built for operation of the Bôrik tunnel on the D1 motorway between Mengusovce and Jánovce. The two tunnel service buildings are on the side in front of the tunnel portal and contain the operation and safety equipment. Both tunnel service buildings are single-storey, solid buildings, partially covered and accessible from the right carriageway.
Detailed design, plans for the structure built.
D1 Bôrik tunnel service building

Europaallee construction site F in Zurich / Switzerland

Basler & Hofmann AG, Boltshauser Architekten AG
Directly adjacent to the tracks of Zurich main station, SBB Real Estate is to build three towers up to 53 metres high. The joint podium will house retail and office space, while the upper floors are intended for apartments. Basler & Hofmann won the first place in the general planner competition and is responsible for the excavation, foundation, structural engineering and anti-vibration measures.
Drafting for the detailed design (formwork and reinforcement plans)
Europaallee construction site F in Zurich / Switzerland

Bôrik motorway tunnel

IS – Marti Contractors consortium
The Bôrik tunnel is part of the D1 motorway on the stretch from Mengusovce to Jánovce to the northwest of Svit in northern Slovakia. It allows a conflict-free track layout for the motorway in a developed area and the conservation area of the High Tatras national park. The tunnel is about one kilometre long and consists of two tubes, each with two lanes and three cross cuts spaced about every 250 metres. The tunnel tubes were driven with the new Austrian tunnelling method (NATM) using shotcrete and dual formwork.
Detailed design
Bôrik motorway tunnel

Štrba, Zámčisko and Palúdza rail tunnels

REMING Consult a.s. Bratislava
The railway line from Žilina to Košice in eastern Slovakia is part of the new EU west–east rail corridor. In the stretch from Liptovský Mikuláš to Poprad Tatry, the two-track line will be expanded to eliminate speed bottlenecks. This requires construction of several new tunnels. The single-tube Štrba, Zámčisko and Palúdza tunnels will be designed for transporting passengers and freight at a maximum speed of 160 kilometres per hour. The 2.5-kilometre-long Štrba mined tunnel will pass under the Za hájom hills not far from the village of Štrba. A crossover will be built in the middle of the tunnel. The 155-metre-long Zámčisko tunnel is part of the Dúbrava/Zámčisko series of tunnels and consists of a 90-metre-long mined section and two short cut-and-cover sections. The 630-metre-long Palúdza tunnel will be built using the cut-and-cover method. The supporting structure consists of diaphragm walls that are 80 centimetres thick and 12 metres long.
Preliminary project, construction project, tender planning/detailed design.
Štrba, Zámčisko and Palúdza rail tunnels

Milochov rail tunnel

REMING Consult a.s. Bratislava
In keeping with the new east–west corridors of the European railway network, modernising railway lines and rail tunnels is a top priority for Slovakia. During retrofitting of railway line No. 120 on the Púchov–Považská Bystrica section between Púchov and Žilina, the Milochov tunnel will be built with a length of 1,955 metres. The maximum speed in the two-track, single-tube tunnel for transporting passengers and freight will be 160 kilometres per hour. Trains with tilting technology can travel at up to 200 kilometres per hour. The tunnel tube consists of a mined section and two cut-and-cover sections. The mined part of the tunnel tube will be driven in stages with horizontal segmentation of the excavation (roof arch, bench, floor).
Construction project, tender planning/detailed design.
Milochov rail tunnel

Žitava I residential complex in Vráble

ViOn a.s.
A new residential area is being built in the Žitava estate in Vráble. It will include 10 identical residential buildings, each with 36 flats. The buildings have six storeys and contain two- and three-room flats with an area between 52 and 78 square metres. The flats on the top floor have a roof terrace or green roof, while all the other flats feature either a balcony or a loggia.
Construction project, detailed design.
Žitava I residential complex in Vráble

Rock and slope stabilisation on the I/18 main road

Doprastav a.s.
There is a risk of rockfall along 6.9 kilometres of the I/18 main road between Žilina and Martin. Various protective structures were built as immediate measures: rockfall protection nets and barriers, protective fences, anchored reinforced concrete ribs and an anchored retaining wall.
General planner in the following phases: Detailed design, Plans for the structures built
Rock and slope stabilisation on the I/18 main road

Rock stabilisation in Strečno

Rocknet SK s.r.o
The I/18 main road between Žilina and Martin in northern Slovakia is at risk of a major rockfall below the Strečno rock face. Before a protection gallery is built, two large overhanging rocks have to be stabilised at a height of 25 metres above the road as an emergency measure. They are stabilised using rock anchors for brittle rock, as well as two tie-back anchored, solid retaining walls.
Detailed design
Rock stabilisation in Strečno

Renovation of the Medveďov Danube bridge

Make Technology s.r.o., Slovakia
The I/13 main road connects the Slovakian town of Medveďov with Vámosszabadi, Hungary, and spans the Danube with a cross-border bridge at kilometre marker 1806.35. The bridge surface in the third segment of the Danube bridge was in need of renovation. The renovation performed along a length of 38 metres included repairs and partial renewal of the reinforced concrete surface, repairs to the pavements and drainage, as well as resurfacing and resealing.
Detailed design, plans for the structures built
Renovation of the Medveďov Danube bridge
More projects
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