Cover Story

Tunnels to Feuerbach and Bad Canstatt for the Stuttgart 21 Project

Injections to restrict ingressing Water in Rock containing Anhydrite

More than 15 km of the tunnels for the Stuttgart–Ulm rail project located in the Stuttgart urban area lie in gypsum keuper containing anhydrite, which swells in contact with water. Owing to the swelling pressures that occur and the displacements caused by swelling, major damage has resulted in the case of many tunnels in the past. As a consequence, the corresponding sections of the tunnels in the Stuttgart urban area are driven absolutely dry.

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Cover Story

Polyurethane Resins and Acrylate Gels

Proof of the Suitability of Injection Agents for Sealing Rock Injections

In connection with tunnelling injections are executed with different goals in mind. An important objective in this case is sealing the rock immediately bordering the tunnel with the aim of preventing water being conducted along the tunnel shell. This is of particular significance if layers of rock which carry water as well as layers sensitive to it have to be penetrated, because the water must be prevented from being transported to the sensitive layers. Injections for sealing rock are also needed if the tunnel is partly produced with a closed invert and partly with an open invert or if waterproofing structures are required to prevent longitudinal conductivity. This report deals with the suitability of injection agents for the cited purpose.

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Fachtagungen | Conferences

ITA Annual Meeting and World Tunnel Congress 2017 in Bergen

More than 1500 tunnellers from 52 countries met in Bergen, Norway, from June 9 to 14, 2017. The occasion was the 43rd Annual Meeting of the ITA (International Tunnelling and Underground Space Association) in conjunction with the 2017 World Tunnel Congress (WTC). The Tunnel Congress organised by the NFF (Norwegian Tunnelling Society) in collaboration with the ITA bore the slogan “Surface Challenges – Underground Solutions”. 52 of the 74 ITA member nations were present in Bergen.

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Forschung & Entwicklung | Research & Development

Switzerland

SCAUT – Swiss Center of Applied Underground Technologies

When space is scarce in the big cities, construction targets the “third dimension”. This has been the case for quite some time now. Modern high-risers have been featured in urban centres in conurbations since the mid-1800s; the first skyscrapers appeared almost 100 years ago. However, the Swiss SCAUT initiative established just a few months ago is not directed sky high: “The third dimension after all, also leads in the other direction – down below”, as Felix Amberg, the president of the SCAUT development association maintains.

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Nachrichten | News

Germany

U5 Tunnel Berlin: Breakthrough to Brandenburg Gate Metro Station

The U5 project in Berlin is one of the most important ongoing infrastructural schemes in Europe for Implenia. On March 22, 2017 the final concrete wall separating the new U5 tunnel from the Brandenburg Gate Metro Station was penetrated. In this way, the gap between U55 (Central Station–Brandenburg Gate) and the traditional U5 (Alexanderplatz–Hönow) has been closed and the tunnel roughwork has been completed, which commenced with the start-up of the “Bärlinde” tunnel boring machine (TBM) back in 2013.

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Nachrichten | News

Germany – Rastatt Tunnel

Rheintalbahn Closure lifted on 2 October

On the morning of 12 August 2017, water and earth collapsed into the east bore of the Rastatt Tunnel in the course of construction works. The permanent way and tracks of the Rheintalbahn (Rhine valley...

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Nachrichten | News

Germany

Final Double Breakthrough at the Emscher Sewer

With the breakthrough of the last two tunnel boring machines into the target pit of construction section 40 on June 12, 2017 the tunnel and pipe jacking work for the Emscher sewer has been completed.

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Nachrichten | News

Malaysia

Kuala Lumpur MRT Line 1 started full Operation

For commuters in Kuala Lumpur, Malaysia, Monday, July 17, 2017, started with a very comfortable first ride in the new Klang Valley Mass Rapid Transit (KVMRT) Line 1. The 51 km long rail line connects the Malaysian capital to outlying areas and is part of the governments vision to create a transportation backbone for the greater Kuala Lumpur and Klang Valley region. The MRT from Sungai Buloh to Kajang (SBK Line or Line 1) is the first of three planned metro lines.

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Nachrichten | News

USA

Strategic Subway Extensions in Los Angeles

Los Angeles suffocates in traffic during rush hour. For this reason the Los Angeles Metropolitan Transportation Authority (Metro) is pushing ahead at full speed with the expansion of local transport...

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