Ernst & Sohn https://www.ernst-und-sohn.de/ Here you can find up-to-date news from Ernst & Sohn Publishers. en Wilhelm Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG Sat, 21 Jul 2018 19:37:35 +0200 Sat, 21 Jul 2018 19:37:35 +0200 Geomechanics & Tunnelling 03/2018 https://www.ernst-und-sohn.de/en/news/geomechanics-tunnelling-032018 <img align="right" src="https://www.ernst-und-sohn.de/sites/default/files/2478_2018_03.jpg" />For the extension of the Metro T Third Line in San Francisco, 2.7 km of tunnels and four new stations will be built. At the Chinatown Station, a cross-cut cavern was excavated by the side drift method. A 27 m long AT–139 pipe umbrella was used to secure the crosscut and the two side drifts. (Photo: DSI Underground) Tue, 19 Jun 2018 12:00:00 +0200 https://www.ernst-und-sohn.de/en/news/geomechanics-tunnelling-032018