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New Sewer Project Protects Emscher River

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The sewerage system in and around Herne is undergoing a transformation as part of a project to protect both the Hüller Bach and Emscher River from wastewater discharges.

The Hüller Bach, a stream which flows through Herne in North Rhine-Westphalia, Germany, is the largest tributary of the Emscher River in the Ruhr area. For years the stream has effectively functioned as an above-ground sewer, with underground canalisation not possible due to the region’s coal mining activities.

As part of a project to protect both the Hüller Bach and Emscher River from wastewater discharges, under the designation of the Emscher conversion project, the sewerage system in and around Herne is undergoing a transformation. A cease in underground coal mining has brought with it the opportunity to move sewerage below the earth’s surface, with the construction of a new 2.6 km sewer pipe string running underground and parallel to the stream.

Since 1992, the Emschergenossenschaft has been planning and implementing the Emscher Reconstruction project in close coordination with the surrounding municipalities, in which almost €5.5 billion will be invested over a period of about 30 years. Sonntag Baugesellschaft mbH & Co. KG, the contractor appointed to undertake the recent microtunnelling works, elected to work with VMT as long-time partner and guidance specialist. A Herrenknecht AVN1600 machine, enlarged to OD2160, was utilised for the project, supported by VMT’s navigation systems SLS-Microtunnelling LT and TUnIS Navigation MTLaserTotalstation.

Excellent collaboration between VMT and Centerline – who undertook the surveying for the project – contributed to the quick and successful completion of the excavation.

 

Three Successful Curved Drives

The new sewer sections were to be installed in three drives. Drive 1, covering a length of 350 m with a minimum curve radius 480 m, was completed in December 2020. Drive 2, completed between February and April 2021, had a length of 900 m with a minimum curve radius of 450 m. Drive 3 had a length of 700 m with a minimum curve radius of 450 m. This final drive was completed between April and May 2021.

Drive 1 utilised the standard SLS-Microtunnelling LT navigation system. This system is designed with a laser target unit, with a tunnel laser mounted in the start shaft of the drive and an active target unit placed in the machine. Data from the laser target continuously determines the exact position of the machine and displays any deviations from the desired alignment immediately on the monitor at the operator’s position. According to Sonntag Baugesellschaft, Drive 1 was described as ‘a winding 350 m long drive’ which ‘broke through the target seal with pinpoint accuracy’.

For the two longer drives with tighter curves, the contractor utilised TUnIS Navigation MTLaserTotalstation, VMT’s latest incarnation of its laser-based guidance systems. In addition to the long distance and tight curvature of the latter drives, further challenges arose as a result of drilling restrictions on site. Usually, installation of the VMT system hardware takes place with the drilling and tightening of screws, allowing an easy workflow and flexibility in case of line-of-sight problems. For this project, however, drilling was not allowed in the tunnel as the inner surface of the pipe string needed to remain unaltered: as a result, sight distances needed to be precisely calculated in advance. In order to securely mount VMT hardware without the use of standard screws, tension rings were used during installation.

TUnIS Navigation MTLaserTotalstation allows precise and efficient navigation of curved and long-distance drives. The expert system is based on the principle of invariance, where the horizontal and vertical position of the machine is determined by a laser total station in conjunction with several reference and target prisms and an electronic target unit inside the machine. The laser total station is permanently installed in the pipe string. An inclination sensor integrated in the electronic target unit measures pitch and roll of the machine. The system is drift and refraction-independent and requires 50% less control measurements than the gyro-based all-rounder system. This equates to less interruption of tunnelling, shorter downtimes, and significantly increased tunnelling performance.

With the main pipe string successfully completed, the project will end later in 2021 with the connection of the lateral sewer connections. This includes the connections at the Herne-Königsgrube pumping station, Herne-Hordeler Heide and the connection of the Herne-Röhlinghausen pumping station to the new sewer of the Emschergenossenschaft.

 

At a Glance Fact Sheet:

Project Name or Designation/Timescale TP 2020 3691 Herne Hüller Bach
Location Herne, Germany
Project requirement
Sewer Installation
Method Microtunnelling/Pipe Jacking
Diameter/Length/Bend Radius Diameter: ID 1,800 mm

Lengths:

  • Drive 1 – length 350m, min. radius 480m in 2020 (Dec.)
  • Drive 2 –  length 900m, min. radius 450m in 2021 (Feb. – Apr.)
  • Drive 3 –  length 700m, min. radius 450m in 2021 (Apr. – May)
VMT System utilised SLS-Microtunnelling LT (used in Drive 1)

TUnIS Navigation MTLaserTotalstation (used for Drives 2 and 3)

Challenges Sight distances would have to be calculated precisely because it was not possible to drill in the tunnel. In order to securely mount VMT hardware without the use of standard screws, tension rings were used during installation.

Congratulations to our SDS Team, who recently commissioned their 50th traceability system on site in Klus-Balsthal, Switzerland.

The visit to our customer Marti Technik AG was one of the first on-site visits after we had carried out several remote commissionings worldwide due to travel restrictions. Together with Marti AG, we will be working on 2 further projects in the coming months. The first is a precast concrete part production for the dam at Lake Gigerwald in Switzerland. The second will cover the segment production for the pilot tunnel of the 2nd tube of the Gotthard road tunnel.

With this anniversary we would like to thank all SDS team members, VMT employees and especially all our worldwide customers for their great cooperation and trust. We’re already looking forward to the next 50 SDS projects and the new challenges they will bring!

Want to learn more about our segment production and logistics management system SDS? Watch the product video here.

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 Finance & Accounting am Standort Bruchsal (bei Karlsruhe) suchen wir zum nächstmöglichen Zeitpunkt einen Sachbearbeiter (m/w/d) Finanzbuchhaltung im Rahmen einer Elternzeitvertretung befristet für die Dauer von 2 bis 2,5 Jahren in Teilzeit (20 Stunden/Woche).

Deine Aufgaben:

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, Madrid und St. Petersburg.

Haben wir Dein Interesse geweckt?

Dann sende uns bitte Deine aussagekräftige Bewerbung, ausschließlich als PDF, mit Deinem frühestmöglichen Eintrittstermin und Deiner Gehaltsvorstellung, per E-Mail an: Bewerbung[at]vmt-gmbh.de.

Wir freuen uns darauf, Dich kennenzulernen!

VMT GmbH | Tanja Hoffmann
Stichwort: Sachbearbeiter Finanzbuchhaltung
Stegwiesenstraße 24 | 76646 Bruchsal
Tel.: 07251 9699-140
Bewerbung[at]vmt-gmbh.de | www.vmt-gmbh.de

The breakthrough of the ITD Cementation India Ltd project in Ahmedabad saw the completion of our first microtunnelling project using Augmented Reality glasses, with a fully remote commissioning.

AR is changing the face of the tunnelling industry, meaning that we’re beside you all the way – even when not physically on site. M. Prakash, TBM Operator from Herrenknecht AG India, said,

“VMT’s project engineers shared the materials and instruction videos of the setup, helping us to know the systems before actually going to the jobsite. On the jobsite Mr. Przemyslaw Rutkowski supported us for setting up the whole system that includes fixing various boxes, PC, and HWL setup. During the drive whenever we had doubts we got immediate support from him.”

Here’s a snapshot of the moments Prezmek got to experience and assist with on site in India, all while sitting in the office in Germany.

Was wir in Bruchsal entwickeln, wird auf der ganzen Welt erfolgreich eingesetzt. Wir verwirklichen Projekte bei denen Weltenbummler und Bürohelden an einem Strang ziehen. Wie Künstliche Intelligenz im Tunnelbau zum Einsatz kommt? Darauf kannst Du gespannt sein.

Wenn Du eine äußerst interessante Karrierechance mit viel Gestaltungsspielraum suchst, bist Du bei uns als Projektleiter (m/w/d) künstliche Intelligenz (KI) im Tunnelbau in unserem Team am Standort Bruchsal (bei Karlsruhe) genau richtig. Auch Berufsanfänger haben eine Chance: Wir bieten dir einen spannenden, zukunftsträchtigen Job mit langfristigem Coaching durch einen Mentor und ein maßgeschneidertes Weiterbildungspaket.

Deine Aufgaben:

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, Madrid und St. Petersburg.

Haben wir Dein Interesse geweckt?

Dann sende uns bitte Deine aussagekräftige Bewerbung, ausschließlich als PDF, mit Deinem frühestmöglichen Eintrittstermin und Deiner Gehaltsvorstellung, per E-Mail an: Bewerbung[at]vmt-gmbh.de.

Wir freuen uns darauf, Dich kennenzulernen!

VMT GmbH | Tanja Hoffmann, Ronja Hörner
Stichwort: Projektleiter künstliche Intelligenz (KI) im Tunnelbau
Stegwiesenstraße 24 | 76646 Bruchsal
Tel.: 07251 9699-140
Bewerbung[at]vmt-gmbh.de | www.vmt-gmbh.de