EN CN

Keeping the World’s 6th Longest Tunnel Construction Project On Track

+ + +

Liege airport required a new sewer system, so a scheme was developed to install some 6.3 km of new sewers beneath the airport. The main contractor for the work was Denys.


Click here to jump to the testimonial statement.


 

The programme of work included the installation of some 933 m of ID1800mm diameter pipe using microtunnelling techniques. Denys engaged experienced microtunnelling contractor K-Boringen to complete this part of the project.

The microtunnelling works were to be completed using the contractor’s Herrenknecht manufactured microtunnelling machine which utilised a TUnIS Navigation MTGyro guidance system from VMT. What made this operation unusual is that, where normally an HWL (Hydrostatic Water Level) system would be used in conjunction with the Gyro system to establish elevation of the boring machine, on this project it was decided that this would not be utilised. This is believed to be the first time such a a pipe jacking project has been undertaken by the contractor without the HWL. This was decided to simplify operations during excavation.

In order to maintain the required tolerances and in particular not to create a counter slope, control measurements were planned at intervals of approximately 60 m. This corresponds to a typical control measurement interval when using gyro navigation systems.

The control measurements were carried out by the specialists from VMT, who were on site during the entire course of the project in order to optimally support the new generation system TUnIS Navigation MT. Since the intention was to extend the control measurement intervals above the usual 60 m, a tunnel laser was installed parallel to the gyro system, which was used to spot-check the determined position.

The navigation with gyro compass and without hydro level has proven itself in this project, with the specified tolerances being adhered to at all times.

Given the location of the new sewer under the high speed double-track railway Liege – Namur, the project also utilised a VMT MODUS (Modular System for automated Deformation Monitoring) system to monitor the deformation of the rails, an application which is rather unusual for microtunnelling projects where bore diameters are relatively small and ground deformation is usually extremely limited.

Commenting on the Liège project for K-Boringen, chief operating officer Wim Feyen said:

“Working without the use of the hydrostatic water level simplified the handling of the drive considerably. Due to production requirements the intervals of our check surveys to monitor the accuracy of the gyro guidance system were a little longer than we would have liked. However, despite this, the alternative calculation method for the vertical position has reached the accuracies that VMT had stated in advance and the bore has been completed within the required tolerances.

For tunnels with very small gradients, it wouldn’t be optimal to rely solely on this new calculation method – however, this project has shown us that, with the right equipment and the right back-up, we can achieve the necessary accuracy of the drive without a hydrostatic water level.”

 

At a Glance Fact Sheet:

Project Name or Designation/Timescale Seraing, Sowaer – two months
Location Liege, Belgium
Project requirement
New sewer system
Method Microtunnelling/Pipe Jacking
Diameter/Length/Bend Radius Diameter 1,800 mm, length 933 m, straight
VMT System utilised TUnIS Navigation MTGyro

Plus MODUS as additional monitoring system (a rare case for a microtunnelling project)

Challenges The TUnIS Navigation MTGyro navigation was used without an HWL (Hydrostatic Water Level) system and so required additional control and extremely high accuracy of check surveys

Diestersteenweg in Sint-Truiden, Belgium is a street that was undergoing renovation which included new sewer and rainwater collection systems. The project also sees the integration of new cycleways, greatly improving safety for cyclists and pedestrians in the area.


Click here to jump to the testimonial statement.


 

K-Boringen was awarded the contract for the new sewer system, which would be installed using microtunnelling equipment. The sewer required the installation of an ID1600 mm pipe string over a length of 548 m. Included in the drive were two curves forming an ‘S’ bend with one curve having a minimum 300 m radius and the second having a minimum radius of 600 m.

Being a long-term user of VMT Navigation Systems, K-Boringen opted to utilise VMT’s new generation system TUnIS Navigation MT in combination with the similarly newly developed hardware platform MT.connect, for highest accuracy of the drives (particularly through the curved sections).

For optimal transparency and overview of the tunnelling process, Jackcontrol provided their Microtunnelling Support System (MSS) together with their equipment for the monitoring of joint movements and pressures inside the pipe string.

Based on the long-term partnership between Jackcontrol and VMT, Jackcontrol has recently decided to participate in the development of MT.connect. As a result both companies are now using the same hardware platform for their systems, significantly minimising the hardware efforts for the jobsite and making handling much easier.

Tunnelling began in early October 2020 with breakthrough being achieved at the reception shaft on 9 December, just some 10 weeks later.

The project also marked the first use in Belgium of the TUnIS Navigation MTLaserTotalstation and MT.connect navigational hardware alongside the Jackcontrol tunnelling system. A few minor teething problems in the new navigation software were quickly overcome, with VMT providing site support and access to the Product Management Team at the head office in Bruchsal.

 

Commenting on the project for K-Boringen, chief operating officer Wim Feyen said:

 

“Running the Jackcontrol and VMT systems over the same hardware platform, MT.connect, worked very well, making handling faster and easier. We’re definitely keen to work with the VMT and Jackcontrol combination again and plan to use MT.connect for our next long straights and curved drives.”

 

At a Glance Fact Sheet:

Project Name or Designation/Timescale Sint-Truiden Diestersteenweg
Location Sint-Truiden, Belgium
Project requirement
Sewer Installation
Method Microtunnelling/Pipe Jacking
Diameter/Length/Bend Radius Diameter 1,600 mm, length 548 m, 300 m minimum radius including S-curve
VMT System utilised TUnIS Navigation MTLaserTotalstation

MT.connect

Jackcontrol

Challenges With a challenging S-Curve (R = 300 m, 600 m) – comprehensive preparation for system components. First use of the Jackcontrol system in combination with VMT Hardware.

Think Local. Act global. Was wir in Bruchsal entwickeln, wird auf der ganzen Welt erfolgreich eingesetzt. Wir verwirklichen Projekte bei denen Weltenbummler und Bürohelden an einem Strang ziehen. Neugierig? Dann „Willkommen bei uns“!

Zur Verstärkung unseres Teams im Projektmanagement Business Unit Navigation am Standort Bruchsal (bei Karlsruhe) suchen wir zum nächstmöglichen Zeitpunkt eine-/n Praktikant (m/w/d)

Deine Aufgaben:

Dein Profil:

Wir bieten:

GUIDED BY VMT.

Seit 25 Jahren ist VMT mit ihren Vermessungssystemen und –services führender Anbieter im Tunnelbau und in der Industrievermessung. Die VMT Gruppe beschäftigt weltweit über 270 Mitarbeiter – am Hauptsitz in Bruchsal (Süddeutschland), in den Tochtergesellschaften in Shanghai, Seattle, Melbourne und Sankt Petersburg sowie in den Vertretungen in Singapur und Neu-Delhi. VMT ist Teil des Herrenknecht Konzerns, dem Weltmarktführer in der maschinellen Tunnelvortriebstechnik.

Über 1.500 erfolgreiche Tunnelvortriebe weltweit dokumentieren die Leistungsfähigkeit und die Innovationsstärke des VMT-Produktportfolios in den Bereichen Navigationstechnologie, Produktions- und Logistikmanagement, Deformations- und Prozessmonitoring sowie Datenmanagement. In der Industrievermessung entwickelt VMT Konzepte und liefert Mess-Equipment & -Dienstleistungen für Fertigungsprozesse mit maximalen Präzisionsanforderungen.

Haben wir Ihr Interesse geweckt?

Dann senden uns bitte deine aussagekräftige Bewerbung, ausschließlich als PDF, mit dem frühestmöglichen Eintrittstermin und deiner Gehaltsvorstellung, per E-Mail an: bewerbung@vmt-gmbh.de.

Wir freuen uns darauf, dich kennenzulernen!

VMT GmbH | Tanja Hoffmann
Stichwort: Praktikant Projektmanagement Navigation
Tel.: 07251 9699-140
Stegwiesenstraße 24 | 76646 Bruchsal
bewerbung@vmt-gmbh.de | www.vmt-gmbh.de

Think Local. Act global. Was wir in Bruchsal entwickeln, wird auf der ganzen Welt erfolgreich eingesetzt. Wir verwirklichen Projekte bei denen Weltenbummler und Bürohelden an einem Strang ziehen. Neugierig? Dann „Willkommen bei uns“!

Zur Verstärkung unseres Teams im Bereich IT Hardware am Standort Bruchsal (bei Karlsruhe) suchen wir zum 01.09.2021 einen AuszubildendenFachinformatiker (m/w/d) Systemintegration.

Deine Aufgaben:

Wesentliche Inhalte der dreijährigen Ausbildung sind:

Der theoretische Teil Deiner Ausbildung findet an der Heinrich-Hertz-Schule in Karlsruhe statt.

Dein Profil:

Wir bieten:

GUIDED BY VMT.

VMT ist mit seinen Vermessungssystemen und –services führender Anbieter im Tunnelbau und in der Industrievermessung. An die 2.400 erfolgreiche Tunnelvortriebe weltweit sowie mehr als zwei Jahrzehnte Erfahrung im Bereich Industrievermessung dokumentieren die Leistungsfähigkeit und Innovationsstärke des VMT-Produktportfolios in den Bereichen Navigationstechnologie, Produktions- und Logistikmanagement, Deformations- und Prozessmonitoring, Datenmanagement und in der Industrievermessung.

In der Branche gilt VMT als kompetenter, verlässlicher Partner ‒ bekannt für seinen hohen Qualitätsstandard und das große Engagement seiner Mitarbeiter.

Die VMT Gruppe beschäftigt derzeit ca. 220 Mitarbeiter/-innen ‒ am Firmensitz in Bruchsal und in den Niederlassungen oder Vertretungen in Melbourne, Seattle, Shanghai, Singapur, Neu-Delhi und St. Petersburg.

Haben wir Dein Interesse geweckt?

Dann sende bitte Deine aussagekräftige Bewerbung, ausschließlich als PDF per E-Mail an: Bewerbung[at]vmt-gmbh.de.

Wir freuen uns darauf, Dich kennenzulernen!

VMT GmbH | Tanja Hoffmann, Ronja Hörner
Stichwort: Auszubildender Fachinformatiker Systemintegration
Stegwiesenstraße 24 | 76646 Bruchsal
Tel.: 07251 9699-140
Bewerbung[at]vmt-gmbh.de | www.vmt-gmbh.de

The Koralm Tunnel, the sixth-longest railway tunnel in the world, forms a 32.9 km long section of the new 130 km long Koralm Railway, which on completion will connect the Austrian cities of Graz and Klagenfurt in the southeast of the country.


Click here to jump to the testimonial statement.


 

The new railway line will comprise 47 km of tunnels, have over 100 bridges and 23 modern railway stations and stops along the route. The project is being hailed as one of the most important transport infrastructure projects currently underway in Europe. The construction of the project is due to be completed by 2023 with the route being fully operational by 2025.

The Koralmtunnel KAT3 construction lot recently broke through completing the last of Koralm Tunnel drives in St. Paul im Lavanttal, Carinthia, Austria. A Herrenknecht 9.94 m diameter Multi-mode TBM was used. This type of machine has the capacity to operate in both EBP and open modes to cope with changing ground conditions along the drive. This particular length of tunnelling work covered the final 10.474 km of the tunnel and included a curve with a minimum radius of 3,000 m. The drive commenced in October 2015 and was recently finish on the 17th of June 2020.

The multi-mode design of the TBM was necessary because for about the first 4 km of the drive the TBM drove through sedimentary rocks of the Neogene period and through the Laventtal main fault zone in EPB mode. In June 2018, after two months of conversion work, the TBM started driving the remaining 6 km (approximately) in the open hard rock mode.

The construction site is owned and managed by major infrastructure contractor PORR which has had a long-term relationship with both Herrenknecht and VMT in connection with other tunnelling projects.

To support tunnelling, VMT supplied the necessary navigation and other site management systems including TUnIS Navigation TBMLaser system alongside TUnIS Navigation Office software, VMT’s  TUnIS Ring Sequencing system, SLuM Ultra (VMT’s Automatic Tailskin Clearance Measurement System) and VMT’s RCMS (Ring Convergence Measurement System). The VMT systems were purchased as part of the TBM contract and mainly installed during the machine build. The RCMS system was installed later during the course of 2019.

VMT engineers also provided on-site training for project staff during the course of the project as well as the purchasing of spare parts when required for the navigation system.

The site team also worked with the VMT team to site test various other VMT products which included the new central box LDT.connect and the ELS3G target unit.

 

 


Testimonial Statement from Joachim Geißbauer, site manager for KAT3

 

 

“Koralm Tunnel Construction Stage KAT3: 10,500 m through most difficult geology

The task

The Koralm railway is part of the new southern railway line. The heart of this new line is the approximately 33 km long Koralm tunnel which connects the two provinces of Carinthia and Styria.

The Koralm tunnel is being built in three construction stages. The third and last construction stage KAT3 extends over a length of around 12 km and will be driven in the north tunnel, for the most part with a tunnel boring machine. The Koralm tunnel crosses the massive Koralpe mountain range with a maximum overburden of about 1,200 m. The two tunnels run with a centre distance of around 40 m and are connected to each other every 500 m by cross-sections. Due to the project length at the KAT3 construction stage of about 11 km, it was necessary to efficiently connect and evaluate the data from segment production, the tunnelling (TBM data) and the surveying work as well as the results of the geological and geotechnical monitoring.

With the support of VMT GmbH and its products, the machine and survey data could be collected and merged.

Furthermore, in geologically challenging areas, the RCMS convergence measurement system was able to produce a condensed record of the ring convergences, which was also linked to the existing survey data from the tunnelling.

Project advantages

 

At a Glance Fact Sheet:

Project Name or Designation/Timescale Koralmtunnel KAT3
Location St. Paul im Lavanttal, Austria
Project requirement
Rail tunnel
Technique LDT – EPB/Hard Rock Multi-mode TBM
Diameter/Length/Bend Radius D= 9.940 mm, L= 10,474 m, R=3,000 m
VMT System utilised TUnIS Navigation TBMLaser

TUnIS Navigation Office

TUnIS Ring Sequencing

SLuM Ultra

RCMS

Challenges The long duration of the project – extending over 5 years – required periodic overhaul and maintenance of the VMT systems and adaptation to changing project specifications.