Geomechanik und Tunnelbau最新文献_第2页

Variant optimization for a green ammonia pipeline: Case study of Sauda/Norway

Geomechanik und Tunnelbau Pub Date : 2025-02-17 DOI: 10.1002/geot.202400076

Dr. techn. Georg H. Erharter, MSc. Eivind Stein, MSc. Ghostavo E. Halawy

{"title":"Variant optimization for a green ammonia pipeline: Case study of Sauda/Norway","authors":"Dr. techn. Georg H. Erharter, MSc. Eivind Stein, MSc. Ghostavo E. Halawy","doi":"10.1002/geot.202400076","DOIUrl":"https://doi.org/10.1002/geot.202400076","url":null,"abstract":"The transition to sustainable energy is crucial for addressing anthropogenic climate change, with green ammonia emerging as a key alternative to fossil fuels. Iverson eFuels AS is planning a green ammonia plant in Sauda, Norway, including a ca. 2800 m long pipeline tunnel to transport ammonia to a storage area at the fjord. This article elaborates on the early-phase variant optimization of the tunnel design, conducted at a pre-Front-End Engineering Design (pre-FEED) stage with limited ground data. Despite common concerns about time and effort, advanced 3D ground modeling and parametric modeling were employed due to the project‘s complex ground conditions and specific technical requirements. These digital tools enabled efficient and comprehensive design assessments, leading to a tunnel route that is optimized with respect to multiple different objectives. Furthermore, the advanced 3D modeling helped to heavily revise a more complicated previous longer pipeline tunnel that also included a valve pit. This case study highlights the benefits of using advanced modeling techniques early in the project lifecycle, demonstrating how they can enhance both the efficiency and quality of engineering solutions, even with limited initial data.","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"18 2","pages":"139-145"},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778197","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}

引用次数: 0

Stockholm metro expansion

Geomechanik und Tunnelbau Pub Date : 2025-02-17 DOI: 10.1002/geot.202400072

Jekaterina Jonsson, Peter Leiner, Johanna Nilsson

{"title":"Stockholm metro expansion","authors":"Jekaterina Jonsson, Peter Leiner, Johanna Nilsson","doi":"10.1002/geot.202400072","DOIUrl":"https://doi.org/10.1002/geot.202400072","url":null,"abstract":"The article highlights the innovative engineering solutions for complex geological conditions within Stockholm's metro expansion project. Key technical methods included ground freezing in the Mårtensdal fault zone and the use of secant piles as deep retaining walls at Sofia station, set to become one of the world's deepest subway stations. For sub-sea tunnelling at Ladugårdslandsviken, the observational method was utilized to mitigate risks of tunnel collapse and uncontrolled water ingress. Lessons learned provide invaluable insights to navigate complex geological and logistical challenges and advance civil engineering practices. The ground freezing method is highly effective for stabilizing ground but requires meticulous design, precise casing alignment, and thorough monitoring to maintain optimal temperature levels. Early risk assessments and detailed site investigations, sampling, and lab testing are crucial for reliable modelling and predicting challenges. Use of secant piles in challenging soil conditions can be successful but demands careful logistical planning and consideration of space constraints. On-site adjustments, such as extending piles or modifying grouting techniques, may be necessary. Utilizing the observational method allows for real-time monitoring and adaptive measures which can prevent delays and maintain safety. Using technology like FME software for 3D modelling with aggregated production data greatly improves productivity and risk mitigation strategies.","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"18 2","pages":"124-132"},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778263","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}

引用次数: 0

Västlänken E02-Centralen – Large excavation pit in Gothenburg's soft clay retained by diaphragm walls

Geomechanik und Tunnelbau Pub Date : 2025-02-17 DOI: 10.1002/geot.202400075

Dipl. Ing. Holger Sawitzki, Dipl. Ing. Olaf Bürger, Prof. Dr. Ing. Christian Scholz

{"title":"Västlänken E02-Centralen – Large excavation pit in Gothenburg's soft clay retained by diaphragm walls","authors":"Dipl. Ing. Holger Sawitzki, Dipl. Ing. Olaf Bürger, Prof. Dr. Ing. Christian Scholz","doi":"10.1002/geot.202400075","DOIUrl":"https://doi.org/10.1002/geot.202400075","url":null,"abstract":"Currently, comprehensive construction works are ongoing within the West Link Project in Gothenburg, whereby a railway tunnel is built below central Gothenburg, consisting of five construction lots including three underground stations. The purpose of the Centralen lot is to connect the commuter traffic to Nils Ericson terminal and to Gothenburg's Central Station by a new four-track underground station with two platforms. Designed as an underground structure, the new station was built by NCC Infrastructure (NCC) as a cut-and-cover tunnel. As the ground consists only of very soft clay down to great depth, the design and construction of the underground station was particularly challenging. Additionally, the complexity of the site conditions is enhanced by limited space, adjacent buildings and existing infrastructure crossing the site. Swedish Transport Administration, Trafikverket (TrV) decided for an early contractor involvement (ECI) contract to overcome the challenges of the Centralen lot. In the first phase, a multidisciplinary project team defined the construction methods, logistical constraints, general design and set a target price. Wayss & Freytag Ingenieurbau AG (W&F) was appointed as a subcontractor for heavy special foundation works. The team developed a solution using diaphragm walls (D-Walls) to create the excavation pit for the new station, which is up to 18 m deep and 50 m wide. S&C Consult GmbH (S&C) served as a consultant during the planning and construction phase and in the quality assurance of the D-Walls. It should be emphasised that this was only the fifth D-Wall project in Sweden. Thanks to the constructive and open cooperation of all parties, the work was successfully completed on schedule in July 2023.","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"18 2","pages":"103-111"},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143778182","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}

引用次数: 0

Melo dam drilled steel pile wall: Restraining seepage through earth dam

Geomechanik und Tunnelbau Pub Date : 2025-02-17 DOI: 10.1002/geot.202400070

Samuli Kiuru

引用次数: 0

Imprint: Geomechanics and Tunnelling 1/2025

Geomechanik und Tunnelbau Pub Date : 2025-02-14 DOI: 10.1002/geot.202580197

引用次数: 0

Sustainability of traffic tunnels: status quo, measurability, and scope for action Taxonomie und Tunnelsanierung: Status quo, Messbarkeit und Handlungsspielräume

Geomechanik und Tunnelbau Pub Date : 2025-02-14 DOI: 10.1002/geot.202400079

Ing. Markus Auinger, Dipl.-Ing. Urs H. Grunicke, Dipl.-Ing. Dr. Karl Grossauer

引用次数: 0

Product Information: Geomechanics and Tunnelling 1/2025

Geomechanik und Tunnelbau Pub Date : 2025-02-14 DOI: 10.1002/geot.202580178

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Preview: Geomechanics and Tunnelling 2/2025

Geomechanik und Tunnelbau Pub Date : 2025-02-14 DOI: 10.1002/geot.202580198

引用次数: 0

Sustainability and tunnelling – Vision underground Nachhaltigkeit und Tunnelbau – Vision Underground

Geomechanik und Tunnelbau Pub Date : 2025-02-14 DOI: 10.1002/geot.202580131

Thomas Marcher

引用次数: 0

Reduction of CO2 emissions in tunnelling based on life cycle assessment

Geomechanik und Tunnelbau Pub Date : 2025-02-14 DOI: 10.1002/geot.202400078

Dipl.-Ing. Elisabeth Hauzinger, Dipl.-Ing. Daniel Schiefer, Univ.-Prof. Dipl.-Ing. Dr. mont. Robert Galler

{"title":"Reduction of CO2 emissions in tunnelling based on life cycle assessment","authors":"Dipl.-Ing. Elisabeth Hauzinger, Dipl.-Ing. Daniel Schiefer, Univ.-Prof. Dipl.-Ing. Dr. mont. Robert Galler","doi":"10.1002/geot.202400078","DOIUrl":"https://doi.org/10.1002/geot.202400078","url":null,"abstract":"Major tunnelling projects, like the extension of corridors for railway lines or the construction of large underground research facilities, are flagships in the European civil engineering industry. In order to deal with matters of sustainability and material management, as much of the generated excavation material must be reused – preferably directly on the construction site to avoid CO2 emissions from long transport routes. While tools for quantifying the process-relevant carbon footprint are already available in other industry sectors, there is still no generally recognized method in the civil engineering and tunnelling industry, as every construction site has its own unique requirements. To find the best utilization option with the lowest possible carbon footprint, a life cycle assessment (LCA) is conducted, where the whole process is divided into three steps: use of construction equipment, transport, and landfilling/recycling of the excavation material. Finally, a ‘reference scenario’ for each process is determined and compared with optimized scenarios to calculate the potential of saved emissions.","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"18 1","pages":"15-21"},"PeriodicalIF":0.0,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143423511","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}

引用次数: 0