Geotechnik最新文献

{"title":"Geotechnik im Wandel – neue Verfahren mit Biozementierungen und Polymeren","authors":"Dr.-Ing. Wolfgang Lieske,&nbsp;Dr.-Ing. Wiebke Baille,&nbsp;Jude Zeitouny M. Sc.,&nbsp;Dr.-Ing. Rowena Verst,&nbsp;Prof. Dr.-Ing. habil. Torsten Wichtmann","doi":"10.1002/gete.70008","DOIUrl":"https://doi.org/10.1002/gete.70008","url":null,"abstract":"<p><b>Evolving geotechnics – New methods using biocementation and polymers</b></p><p>Significant greenhouse gas emissions are directly and indirectly attributable to the construction industry. Since the ratification of the Paris Climate Agreement at the latest, the question has therefore arisen as to how geotechnical structures can be built more sustainably in the future. This article deals with the essential aspects of two alternatives to common methods for modifying soil properties with regard to various applications. First, microbially induced calcite precipitation (MICP) is presented, followed by the application of polymers for the targeted modification of soil properties and as a supporting fluid. In addition to the basic mechanisms and technical implementation, challenges in implementation are also discussed.</p>","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":"54-67"},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564885","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}

{"title":"Inhalt: geotechnik 1/2026","authors":"","doi":"10.1002/gete.70022","DOIUrl":"https://doi.org/10.1002/gete.70022","url":null,"abstract":"","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gete.70022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Termine: geotechnik 1/2026","authors":"","doi":"10.1002/gete.70025","DOIUrl":"https://doi.org/10.1002/gete.70025","url":null,"abstract":"","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":"91-92"},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565502","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}

{"title":"Geologisch-geotechnische Einflussfaktoren auf die Bohrbarkeit bei Bohrpfählen in Festgestein","authors":"Tanja Sattler M.Sc.,&nbsp;Prof. Dr. Kurosch Thuro","doi":"10.1002/gete.70020","DOIUrl":"https://doi.org/10.1002/gete.70020","url":null,"abstract":"<p><b>Evaluation of geological and geotechnical influencing factors on drillability in hard rock – A practical assessment</b></p><p>While drillability in tunnelling is a well-researched topic, the importance of drillability for rotary pile drilling has commonly lacked recognition. This report is aimed at shedding light on the systematic evaluation of drillability in bored piles, a topic which can be of paramount importance for the successful completion of any construction project. The main focus is on the correlation of geological and geotechnical influencing factors on drillability, which is examined in various case studies. The analyses of the case studies show that geological and geotechnical influencing factors have a significant impact on the achievable drilling velocities and tool wear. The working principles and drilling performance of the round shank chisels and replaceable teeth are analysed separately, as notable differences were evident for these different tools, especially when taking rock mass properties into account. Based on these results, rotary-piling specific classification systems for tool wear were developed –with the one for replacement teeth being first of its kind. The presented approaches contribute to a stronger consideration of drillability-related factors and key challenges in construction practice—starting from the very beginning of a project as a decisive planning parameter, rather than recognizing drillability as a critical bottleneck during the construction phase.</p>","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":"40-53"},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563589","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}

{"title":"Titelbild: geotechnik 1/2026","authors":"","doi":"10.1002/gete.70023","DOIUrl":"https://doi.org/10.1002/gete.70023","url":null,"abstract":"","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gete.70023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zum Einsatz von Recyclingbaustoffen bei der Baugrundverbesserung mittels Rüttelstopfverdichtung","authors":"Dr.-Ing. Ivo Kimmig,&nbsp;Dipl.-Ing. Christoph Wehr,&nbsp;Pascal Schauber M.Sc.,&nbsp;Marcel Mertens M.Sc.","doi":"10.1002/gete.70019","DOIUrl":"https://doi.org/10.1002/gete.70019","url":null,"abstract":"<p><b>On the use of RC materials in ground improvement using vibro stone columns</b></p><p>Ground improvement with vibro stone columns offers great potential for resource-efficient construction methods, which can be further enhanced using recycled building materials. Extensive investigations conducted within two practical projects show that both recycled concrete and processed excavated material have comparable shear strengths to naturally sourced aggregate, despite lower resistance to mechanical stress. Large-scale load tests were used to investigate the load-settlement behavior of groups of four columns and to verify the load-bearing capacity. Provided that the reduced stiffness of the RC material is considered in the design, recycled building materials prove to be an efficient and sustainable alternative, whose use remains limited by current legal restrictions.</p>","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":"68-76"},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147563076","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}

{"title":"Vorschau: geotechnik 1/2026","authors":"","doi":"10.1002/gete.70026","DOIUrl":"https://doi.org/10.1002/gete.70026","url":null,"abstract":"","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gete.70026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Was beeinflusst Leistung und Verschleiß?","authors":"Kurosch Thuro","doi":"10.1002/gete.70021","DOIUrl":"https://doi.org/10.1002/gete.70021","url":null,"abstract":"&lt;p&gt;Auf diese einfache Frage gibt es viele komplexe Antworten. Als ich mich vor fast 40 Jahren erstmals im Rahmen meiner Diplomarbeit mit dem Thema beschäftigt habe, waren der Stahlpreis und der für Wolframcarbid – die Grundlage für hartmetallbesetzte Werkzeuge – niedrig. In den ersten Diskussionen erntete ich daher eher Unverständnis dafür, dass ich mich dieser Frage überhaupt widmen wollte.&lt;/p&gt;&lt;p&gt;Nun, seitdem hat sich einiges geändert. Neben dem Preis für Stahl beispielsweise auch der Preis für Wolfram auf dem Rohstoffmarkt: Für Wolfram – als Grundstoff für Wolframcarbid und Hartmetall – wurde im vergangenen Jahr und Anfang 2026 weltweit ein massiver Preisanstieg von rund 300% verzeichnet. Nicht zuletzt deswegen, da China im Februar 2025 als Reaktion auf die neuen US-Zölle eine Exportbeschränkung für fünf kritische Rohstoffe eingeführt hat. Wer also dachte, Probleme gäbe es nur mit den sogenannten „seltenen Erden“ in der High-Tech-Branche, hat sich geirrt. Für alle diese Rohstoffe hat China zwar kein Monopol, dominiert aber de facto den Markt.&lt;/p&gt;&lt;p&gt;Und so rückt einmal mehr ein Problem in den Vordergrund: der Verschleiß. Und dieser steuert u.a. auch die Leistung. Beide – Leistung und Verschleiß – hängen insbesondere von den Materialeigenschaften der Gesteine ab, ihrer Abrasivität und ihrer Festigkeit.&lt;/p&gt;&lt;p&gt;Glücklicherweise wurden in den letzten rund 50 Jahren eine Reihe von Abrasivitätsversuchen entwickelt und – nicht zuletzt mithilfe der DGGT Empfehlungen – immer weiter verbessert. Auch wenn wir als Spezialisten uns nicht immer einig sind, welche Versuche für welche Gesteine besser geeignet sind oder welche Parameter überhaupt bestimmend sind. Denn eines ist sicher: Wir bestimmen die Abrasivität grundsätzlich über den Verschleiß eines Versuchswerkzeugs – zumindest bei den am häufigsten angewandten Versuchen, dem &lt;span&gt;Cerchar&lt;/span&gt;- und dem LCPC-Versuch.&lt;/p&gt;&lt;p&gt;Relativ große Einigkeit gibt es bei den Verfahren zur Ermittlung der Abrasivität in Festgesteinen. Aber wie sieht es in Böden aus – also Lockergesteinen? Eine unangenehme Überraschung erlebte man beim Bau der rund 40 km langen Eisenbahn-Hochleistungsstrecke zwischen Kundl/Radfeld und Baumkirchen in Tirol vor nunmehr rund 20 Jahren. 32 km der Strecke wurden als Tunnel, Wannen, Galerien und Unterflurtrassen in den Flussschottern des Unterinntals realisiert. In den Hauptbaulosen kamen Hydroschild-Tunnelvortriebsmaschinen zum Einsatz, die sich an den abrasiven, kristallingeröllreichen Innschottern im wahrsten Sinne des Wortes die Zähne ausbissen. Obwohl bei den Voruntersuchungen bereits der damals noch wenig bekannte LCPC-Abrasivitätsversuch zum Einsatz kam, war der Verschleiß bei der Baudurchführung deutlich höher als prognostiziert. Warum? Leider waren damals noch nicht alle Zusammenhänge bekannt. So wurde beispielsweise für die LCPC-Versuche bei den Voruntersuchungen – streng nach Prüfvorschrift der damals gültigen Französischen Norm – nur die Körnung 4 bis 6,3 mm abgesiebt und im LCPC-G","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gete.70021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"geotechnik rubriken 1/2026","authors":"","doi":"10.1002/gete.70024","DOIUrl":"https://doi.org/10.1002/gete.70024","url":null,"abstract":"","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":"77-91"},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565501","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}

{"title":"Zur Modellwahl bei geotechnischen Randwertproblemen – Beispiele und kritische Anmerkungen","authors":"Univ.-Prof. Dr.-Ing. Jürgen Grabe","doi":"10.1002/gete.70018","DOIUrl":"https://doi.org/10.1002/gete.70018","url":null,"abstract":"<p><b>Model selection for geotechnical boundary value problems – Examples and critical remarks</b></p><p>Numerical methods are widely employed in both research and practice to model boundary value problems. In conjunction with observations and measurements, they facilitate a deeper understanding of mechanical processes at the micro and macro scales. At the microscale, the interactions between particles, pore water, and gas are of particular interest. Here, the application of computed tomography is unlocking a new realm for soil mechanics. While numerical models for this scale are, to some extent, still under development, the combination of imaging and modelling enables an enhanced understanding of these fundamental processes. At the macro-scale, dynamic and time-dependent soil-structure interaction problems present particular challenges. The installation of structures typically induces large soil deformations and associated changes in the soil state, necessitating the use of specialized numerical techniques. Furthermore, cyclic loading leads to the accumulation of deformations, which limits the serviceability of the structure over time. These phenomena will be demonstrated through examples, followed by the formulation of critical remarks.</p>","PeriodicalId":43155,"journal":{"name":"Geotechnik","volume":"49 1","pages":"18-28"},"PeriodicalIF":0.4,"publicationDate":"2026-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147565066","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}