| Project executed | 11/2011 - 7/2016 (planned) |
| Tunnel length | approx. 4.400 m |
| Highway tunnel | two and three tracks with tunnel enlargements and cross cuts |
| Services | geodetic disformation measurements, localisation of water ingresses, tunnel scanner comprehensive documentation, drift as well as sealing and tunnel lining |
| Client/Owner | ASFINAG |
Tunnel Götschka is 4,4 km long and part of the S 10 Mühlviertler highway new construction, which is a transport infrastructure project of regional, national as well as international importance. The tunnel leads south to north and is constructed as a gradient tunnel due to topographical reasons. Its one tube is planned three-lane, while the western tube is built two-lane.
Surveying services include geotechnical measurements with tunnel scanner recordings, as well as the localisation of major water ingresses in accordance with the water law decision for the tunnel project. Geodetic deformation measurements above ground are directly carried out on the slope stabilisation and the surrounding terrain. Additional vertical inclinometer are set and anchor load measurings are executed at selected pretensioned anchors. Inclinometer measurements above ground are carried out as a supplement to the advance measurements under ground.
Tunnel driving is implemented as cyclic drift, according to the blast method of the new austrian tunnelling method (NÖT). Geotechnical measurements under ground are carried out as geodetic deformation measurements and also by the means of measuring anchors and anchor load measurings. A comprehensive documentation of each of the four tunnel drives, including tunnel enlargements and cross cuts are executed with the tunnel scanner. Another comprehensive documentation of the tunnel sealing and the tunnel lining has to be accomplished after finishing the drifts in the main tubes.
Furthermore specific measuring instruments as hydraulical pressure sensors, extension sensors and sliding micrometer are provided and installed.
Surveying services are implemented for following sections:
The project is executed as ARGE Pyöry Infra GmbH / Dibit Messtechnik GmbH.
| Project executed | 2/2011 - 10/2011 (ÖSTU Stettin) 2/2012 (TIWAG) |
| Surveyed length | approx. 777 m |
| Services | construction survey, geotechnical measurements, geodetic measurements, triangulation network measurements |
| Client/Owner | Östu-Stettin |
A development program of the Kaunertal power plants' reconstruction was issued, that included an altered operation of the Gepatsch water reservoir. An exploration tunnel in the Klasgarten reservoir hillside of the Kaunertal power plant should be constructed, to particularly examine the formation of this specific creeping slope. The information provides a detailed geologic model of the reservoir hill and shall be used towards a monitoring program which includes on site geologic observations and the installation of rope extensometer and other different geotechnical monitoring systems.
Survey services for the preliminary cut and tunnel included the preparation of a survey concept, which included checks of the existing survey grid, backup, continuation and densification of the network, tunnel project calculations (alignment and profiles), stake out of preliminary cut and portals, set up and continuous extension of the advancing tunnel control grid, as well as ongoing triangulation network measurements every 200 meter.
Dibit Messtechnik GmbH accomplished and processed the geodetic and geotechnical surveys such as convergence monitoring in the tunnel. The tunnel heading guidance occurred by a motorized total station and software called motor laser system. All niches and tunnel enlargements were laid out and tunnel profile checks at the face were conducted. All field data was processed and put into reports for their respective result representation.
From the terrain plane geodetic surveys were carried out to determine the volume of the excavation material.
| Project executed | 7/2010 - 9/2011 |
| Tunnel length | 1.030 m |
| Railway tunnel | second tube single track with one cross cut |
| Services | geotechnical monitoring, tunnel scanner survey, construction survey network measurements |
| Advance method | NATM / cyclic drift / SEM |
| Client/Owner | BeMo Tunnelling GmbH |
The 135-year-old, 935 meter long Bebenroth Tunnel, located on the route Göttingen - Eichenberg - Bebra in Germany was in need of rehabilitation. In order to perform the rehabilitation of the old tunnel a new 1.030 meters long tunnel was constructed, parallel to the old, upon completion in 2013 trains will be conducted through this new tunnel allowing the rehabilitation construction work to be started on the old. From 2014 on both tunnels with a single track each will be open for rail traffic.
The geotechnical monitoring program includes geodetic monitoring measurements of deformations both above and below ground, in addition the old Bebenroth tunnel is also automatically monitored. This part of the system is supervised by the construction team.
The tunnelscanner comprehensive documentation includes a deduction related recording of the excavation, recording of shotcrete, isolation girder and final lining. These results were delivered to the client within 24 hours..
A comprehensive as-built documentation with corresponding 3D-model was created for the old Bebenroth Tunnel. During construction further subsequent surveys were also carried out.
The monitoring program consisted of measurements of the parallel construction of the underground fixed-point network within the tunnel and its control.
As part of the construction survey all stake out and control measurements such as pre, cross cuts, etc. were accomplished.
| Project executed | 9/2006 - 2011 |
| Surveyed length | approx. 6.500 m |
| Highway tunnel | double track with cross cuts to the first tube |
| Services | geotechnical measurements, tunnel scanner documentation, net-/check measurements |
| Advance method | NATM / cyclic drive |
| Client/Owner | ASFINAG |
The upgrade of the Tauern tunnel with the addition of a second tube is part of ASFINAG’s tunnel expansion program to increase tunnel safety throughout Austria. In the course of this program highway tunnels with just one tube are to be extended with a second tube. Between the two tunnels cross cuts are to be established along with the refurbishment and additional recesses in existing tunnel tubes.
The tunnel leads through loose material as well as solid rock, which is interspersed with geological interference zones. The survey program of the geotechnical measurements includes geodetic deformation measurements above and below ground as well as extensometer measurements. The tunnel scanner survey measurements comprise of excavation, shotcrete, isolation girder and final lining. The monitoring program of the control points involves performing above and below ground survey measurements.
This project was executed in collaboration.
| Project executed | 2006 - 2008 |
| Tunnel length | approx. 5.100 m |
| Highway tunnel | double track with cross cuts to the first tube |
| Services | geotechnical measurements, comprehensive tunnel scanner survey, network measurements, construction survey |
| Advance method | NATM / cyclic drive |
| Client/Owner | ASFINAG |
The upgrade of the Roppener tunnel with the addition of a second tube is part of ASFINAG’s tunnel expansion program to increase tunnel safety throughout Austria. In the course of this program highway tunnels with just one tube are to be extended with a second tube. Between the two tunnels cross cuts are to be established along with the refurbishment and additional recesses in existing tunnel tubes.
Geotechnical Measurement
The survey program of the geological measurements included geodetic deformation measurements above and below ground, as well as extensometer and inclinometer measurements. Geodetical monitoring measurements were accomplished for the lattice tower in the eastern section with loose rock along with the information buildings, access bridge to B171, traffic areas, roundabout and art piece at the interchange Pitztal and also the highway bridge before the western portal. Additional the existing portal buildings were permanently monitored by means of geodetical survey during construction works.
Tunnel Scanner Survey
The comprehensive tunnel scanner perfomance involved the allowance-related recording of the excavation, shotcrete, insulating layer and final lining. The results were delivered to the client within 24 hours.
Evidence of the First Tube and the Portal Building
A comprehensive documentation including 3D-model of the 1st tube was issued. Existing damages (cracks, spalls, water ingresses, etc.) were gathered and were mapped in a database-based tunnel information system. During construction work additional follow up surveys were accomplished in the portal areas.
Network Monitoring
The monitoring program for the survey network consisted of measuring the parallel tunnels fixed point and control network. During construction downtime (Easter, Christmas) checks where carried out on the control network and corrections made if necessary.
Construction Survey
Within the construction survey the complete stake out and inspection measurements were accomplished. These services were part of the collaboration with the contractor ARGE tunnel Roppen.
| Project executed | 9/2004 - 5/2005 |
| Tunnel length | approx. 380 m |
| Road tunnel | double-track |
| Services | geotechnical measurements, net measurements, tunnel scanner documentation shotcrete |
| Advance method | NATM / cyclic drift |
| Client/Owner | Ingenieurbüro EUT GmbH |
Project bypass tunnel Ölberg is designed to avoid a precarious rockfall section between kilometer 71,670 and 72,215 of the interstate SS 508 Sterzing- Pfitsch.The centerpiece of this diversion project is the 380 meter long Ölberg tunnel, which was constructed from at both portals using an underground mining technique. In the portal areas a drift occurred with an excavation section of 77 m² in partly loose material with a slight overlapping of approx. 5 meters.
The monitoring program of geotechnical measurements includes geodetic deformation measurements above and below ground.
The tunnel scanner measurements include the recording of the shotcrete.