Dipl. Ing. Sebastian Pausz, Dr. Dipl. Ing. Miroslav Marence, Dipl. Ing. Armin Nocker B.Sc., Dr. Dipl. Ing. Mathias Smesnik, Dipl. Ing. Zoran Radic
{"title":"Current experiences in the design and construction of pressure tunnels and shafts","authors":"Dipl. Ing. Sebastian Pausz, Dr. Dipl. Ing. Miroslav Marence, Dipl. Ing. Armin Nocker B.Sc., Dr. Dipl. Ing. Mathias Smesnik, Dipl. Ing. Zoran Radic","doi":"10.1002/geot.70026","DOIUrl":"https://doi.org/10.1002/geot.70026","url":null,"abstract":"<p>Hydrotechnical power waterways in the form of pressurized tunnels and shafts pose geotechnical requirements on the surrounding underground, which vary significantly from those of other infrastructure tunnels, like traffic or mining tunnels. The excavation process and the primary support design requirements of traffic and hydrotechnical tunnels are the same. Nevertheless, the structural design aspects of the final (inner) lining of these two tunnel types are different and misunderstanding of these differences is often the reason for problems occurring in operation. Although the technical issues related to the subject were correctly identified and solved decades ago, it appears that some of the basic technical aspects are not addressed correctly in the design and execution of some hydrotechnical tunnels today. This fact was the main motivation of the authors to summarize current experiences of design and construction in hydropower projects worldwide. The primary focus is placed on the technical requirements for the final hydraulic lining of tunnels and shafts. For unlined and shotcrete lined tunnels, the design is mostly performed by classification systems. The limitations and risks of this approach are explained. For concrete lined and steel lined tunnels and shafts, current experiences and preconditions for the state-of-the-art design approaches are discussed.</p>","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"18 5","pages":"490-497"},"PeriodicalIF":0.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dipl.-Ing. Dr.techn. Alexander Kluckner BSc., Dr.techn. Georg H. Erharter, DDipl.-Ing. Dr.techn. Andreas-Nizar Granitzer, Bettina Mair BA MA, Dr. Suzanne Lacasse
{"title":"Generational gaps in geotechnics? A transalpine perspective","authors":"Dipl.-Ing. Dr.techn. Alexander Kluckner BSc., Dr.techn. Georg H. Erharter, DDipl.-Ing. Dr.techn. Andreas-Nizar Granitzer, Bettina Mair BA MA, Dr. Suzanne Lacasse","doi":"10.1002/geot.70017","DOIUrl":"https://doi.org/10.1002/geot.70017","url":null,"abstract":"<p>Geotechnical engineering is a challenging profession and offers exciting working opportunities. However, in recent years, it struggled to attract young talents. While shifting life and work values are frequently given as contributing factors, empirical evidence to support this claim remains scarce. In view of that, an international online survey was conducted from March to July 2025 to explore generational differences in experiences, beliefs, needs, and goals of members of the applied geo-community. The survey targeted professionals of all ages who study or work in geotechnics or other applied geo-related disciplines. This article focuses on the responses from Austria, Germany, and Switzerland. The results do not suggest that there is a consistent generational gap. While there are certain differences about some topics (e.g., conflicts with younger generations rather revolve around work-life balance and priorities but with older generations more around authority and decision-making), many questions show strong agreement between generations (e.g., finding meaning and fulfilment in the job is more important than income). The results serve as a foundation for increasing the profession's attractiveness, offer valuable insights into intergenerational biases, and lay the groundwork for improved collaboration in the workplace.</p>","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"18 5","pages":"393-403"},"PeriodicalIF":0.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dipl.-Ing. Reinhold Boiger, M.Sc. André Wesch, Dipl.-Ing. Robert Listl, B.Eng. Rainer Saul, Dipl.-Ing. Mathieu Manjarres
{"title":"JV Marienhof – Tunnelling under compressed air conditions and excavation works in the inner-city area\u0000 ARGE Marienhof – Druckluftvortrieb und Aushubarbeiten im innerstädtischen Raum","authors":"Dipl.-Ing. Reinhold Boiger, M.Sc. André Wesch, Dipl.-Ing. Robert Listl, B.Eng. Rainer Saul, Dipl.-Ing. Mathieu Manjarres","doi":"10.1002/geot.70024","DOIUrl":"https://doi.org/10.1002/geot.70024","url":null,"abstract":"<p>In the heart of Munich's city centre, the new Marienhof station is being built for the second S-Bahn main line. The new central access structure is being constructed using the diaphragm wall method and, at a depth of 42 m, is the deepest excavation pit in Germany to date. The platform tunnels for the station and a connecting tunnel to the existing U3/U6 underground line are also being driven from the excavation pit at Marienhof using the mine driving method under compressed air. The following article provides an overview of the status of the work and the special features of the connecting tunnel excavation.</p>","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"18 5","pages":"450-458"},"PeriodicalIF":0.0,"publicationDate":"2025-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145237261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}