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Projects Tunnel construction work in the BBT Eisack underpass construction lot completed / Tunnelbauarbeiten im BBT‐Baulos Eisackunterquerung abgeschlossen Planning process for Frankfurt Inter‐city railway tunnel shortened / Planungsprozess für Fernbahntunnel Frankfurt beschleunigt Operational exercises before commissioning of the Koralm Railway / Einsatzübungen vor Inbetriebnahme der Koralmbahn Limberg 3 – Heavy transport in the mountain / Limberg 3 – Schwertransporte im Berg Second underground lot awarded for Hamburg U5 / Zweites U‐Bahnlos für Hamburger U5 vergeben Ligerz tunnel contract awarded as part of the Ligerz‐Twann double‐track extension project / Tunnel Ligerz im Rahmen des Doppelspurausbaus Ligerz‐Twann vergeben Max Bögl commissioned to produce and deliver segments for the Brenner Base Tunnel / Max Bögl mit Produktion und Lieferung von Tübbingen für den Brenner Basistunnel beauftragt Final breakthrough for the Silvertown Tunnel / Finaler Durchbruch für den Silvertown‐Tunnel STRABAG UK opens precast tunnel segment plant in Hartlepool / STRABAG UK eröffnet Fertigteilwerk für Tunnelsegmente in Hartlepool Extensive diaphragm wall work for Jakarta metro station / Umfangreiche Schlitzwandarbeiten für U‐Bahnstation in Jakarta Call for papers – Topics for the next issues of Geomechanics and Tunnelling / Themen für die nächsten Ausgaben der „Geomechanics and Tunnelling" [ABSTRACT FROM AUTHOR]

Projects First tunnel boring machine in Brenner contract section H61 reaches destination / Erste Tunnelbohrmaschine im Brenner‐Baulos H61 am Ziel Breakthrough at Sarnersee / Durchbruch am Sarnersee Tunnel construction for the Brenner Base Tunnel North feeder / Stollenbau für den Nordzulauf zum Brenner Basistunnel beauftragt A13 Ceremony to mark start of work on the Isla Bella Tunnel / A13 Anschlagfeier Sicherheitsstollen Tunnel Isla Bella Implenia wins subway projects in Toulouse and Oslo / Implenia erhält U‐Bahnprojekte in Toulouse und Oslo Preparations for machine tunnelling in Construction Lot H41 of the Brenner Base Tunnel / Vorbereitungen für den maschinellen Vortrieb im Baulos H41 des Brenner Basistunnels Tunnel refurbishment for the Lahn Valley Railway / Tunnelsanierung für Lahntalbahn Restoration of the land to its natural state in the Eisack underpass construction lot / Renaturierungsmaßnahmen im Baulos Eisackunterquerung Call for papers – Topics for the next issues of Geomechanics and Tunnelling / Themen für die nächsten Ausgaben der „Geomechanics and Tunnelling" [ABSTRACT FROM AUTHOR]

In the construction industry, increased efforts are being made to automate production processes using industrial robots in order to increase efficiency, improve quality and optimize the use of materials. Tunnel construction is particularly suitable for the use of modern production methods, as the increased use of machines and the high repetition factor of the components used make it possible to scale production technology across project boundaries. This paper provides examples of current developments in segment production, in particular the use of industrial robots in the prefabrication of reinforcement cages and subsequent concreting. Necessary adaptations in segment design are pointed out when welded reinforcement is used, and conceivable further developments are shown. The medium‐term goal is a continuous IT‐based production control system that allows short‐term adjustments to segment production, logistics and subsequent installation in the tunnel. [ABSTRACT FROM AUTHOR]

Glacial soil deposits are present in Europe on both sides of the Alps, in Scandinavia, Northern Germany, Poland and in North America. There are typical names of the stages of the glaciation, however, the geotechnical characteristics of glacial deposits are similar in all regions; but are very heterogeneous locally. Glacial deposits extend from boulders to invisible silt particle (rock flour) and to clay particles, both of similar grain size. In this paper the focus will be on clean gravel without fines, so‐called open gravel and the challenges and solutions for tunnelling. Face support by pure bentonite slurry is insufficient in open gravel. Different techniques have been used in practice: clogging the pore channels with fines of appropriate gradation by controlling the content fines in the slurry. Use of high viscous slurry with increased clay or bentonite content. In another solution lime powder and polymers were added in the excavation chamber of an earth‐pressure shield to modify the ground. Other aspects such as muck disposal will be evaluated. [ABSTRACT FROM AUTHOR]

Projects Final major tunnelling contract awarded for Sydney Metro West / Letzter großer Tunnelbauauftrag für Sydney Metro West vergeben Implenia builds Boknafjord tunnel in Norway / Implenia baut Boknafjord‐Tunnel in Norwegen Contracts for main tunnel and materials management for second tube of Gotthard road tunnel / Verträge über Haupttunnel und Materialbewirtschaftung für zweite Röhre Gotthard Straßentunnel Greywacke – Rock of the Year 2023 / Grauwacke – Gestein des Jahres 2023 Carcassing work in the Albula Tunnel complete / Roharbeiten im Albulatunnel abgeschlossen Second tube of Long Itchington Wood Tunnel launched / Zweite Röhre der Long Itchington Wood Tunnels angefahren Shell construction of cross passages in Rastatt Tunnel complete / Querschläge im Tunnel Rastatt im Rohbau fertig Blast driving in Cholfirst safety tunnel started / Sprengvortrieb im Sicherheitsstollen Cholfirst gestartet North Portal of Brenner Base Tunnel is taking shape / Nordportal des Brenner‐Basistunnels nimmt Gestalt an New Wendlingen‐Ulm line goes into operation / Neubaustrecke Wendlingen‐Ulm in Betrieb Call for papers – Topics for the next issues of Geomechanics and Tunnelling / Themen für die nächsten Ausgaben der „Geomechanics and Tunnelling" [ABSTRACT FROM AUTHOR]

Great importance is attached to 'pressure‐volume records' for the execution, documentation and billing of rock grouting. In this context, special digital data management systems are now available which can provide data in a structured and consistent format that is also suitable for artificial intelligence (AI) approaches. Using datasets from a tunnel project in Scandinavia, this paper shows that artificial neural networks can be used to reliably predict the evolution of pressure‐volume records or the volume of grout injected at the end in the interests of construction site efficiency. Taking into account the technical feasibility of using AI to support tunnel grouting, we then show which contractual modifications would be required in order to make effective use of corresponding developments. [ABSTRACT FROM AUTHOR]

Projects Tunnelling work for the Obervellach II power station has been completed / Vortriebsarbeiten für Kraftwerk Obervellach II abgeschlossen Refurbished Bosruck tunnel is fit for the future / Sanierter Bosrucktunnel ist fit für die Zukunft Opening of the refurbished Belchen tunnel / Eröffnung des Sanierungstunnels Belchen Start of tunnelling for the BBT H41 "Sill Gorge – Pfons" contract section / Tunnelanschlag im BBT‐Baulos H41 Sillschlucht‐Pfons Tunnel boring machine started in Göschenen / Tunnelbohrmaschine in Göschenen gestartet Manufacturing of test element for the Fehmarnbelt Tunnel successfully completed / Erfolgreiche Fertigung eines Testelements für den Fehmarnbelt‐Tunnel Pilot project for renewal of the Elleringhausen Tunnel / Pilotprojekt zur Erneuerung des Elleringhausener Tunnels Construction of Hamburg's district heating tunnel gets underway / Baustart für Hamburgs Fernwärmetunnel Deutsche Bahn submits planning for Offenburg Tunnel ‐ Deutsche Bahn reicht Planung für Tunnel Offenburg ein Entire route of the new section of the Brenner North feeder now established / Gesamtverlauf der Neubaustrecke Brenner‐Nordzulauf steht fest Contract awarded for Gotthard main northern section / Gotthard Hauptbaulos Nord vergeben Call for papers – Topics for the next issues of Geomechanics and Tunnelling / Themen für die nächsten Ausgaben der „Geomechanics and Tunnelling" [ABSTRACT FROM AUTHOR]

Abstract: First tube of the Feuerbach Tunnel broken through / Erste Röhre des Tunnels Feuerbach durchgeschlagen Rastatt Tunnel: Works continue in the east bore / Tunnel Rastatt: Arbeiten in Oströhre gehen weiter Preparations for mechanised tunnelling in Mauls / Vorbereitungen für die maschinellen Vortriebe in Mauls Breakthrough in the Eppenberg Tunnel / Durchschlag im Eppenbergtunnel ILF gains follow‐up contract at the Brenner Base Tunnel / ILF erhält Folgeauftrag für den Brenner Basistunnel Hochtief and Vinci to design and build Metro line in Copenhagen / Hochtief und Vinci planen und bauen Metrolinie in Kopenhagen Rail tunnel for Erding ring closure at Munich airport / Bahntunnel für Erdinger Ringschluss am Flughafen München Asfinag invests 1.1 billion Euros / Asfinag investiert 1,1 Milliarden Euro Risk analysis for the ”train into the clouds“ in Argentina / Risikoanalyse für Argentiniens „Zug in die Wolken” DSI takes over specialist for robotic maintenance / DSI übernimmt Spezialist für Roboter gestützte Instandhaltung Drill and blast excavation of the main tubes of the Filder Tunnel completed / Sprengvortrieb in den Hauptröhren des Fildertunnels beendet Call for papers – Themes for the next issues of Geomechanics and Tunnelling / Themen für die nächsten Ausgaben der „Geomechanics and Tunnelling” [ABSTRACT FROM AUTHOR]