Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Investigation of soil-structure interaction for deep excavations
Deep excavations are widely adopted in infrastructure projects for the construction of underground storage, deep foundations, basements, and launch and reception pits for tunnel boring machines for the transport, water and wastewater, energy, and commercial and industrial building sectors. Deep excavations typically comprise an in situ concrete or driven steel earth retaining wall braced with support structures including steel frames and ground anchorages. Rapid population growth in urban areas is driving the increasing depth and complexity of deep excavations, which is increasing the likelihood and severity of risks associated with ground deformations. Therefore, it is important that understanding of the performance of these structures, and the predictive tools used in their design, are improved through more sophisticated approaches, including complex three-dimensional (3D) numerical analyses and real-time monitoring systems. This thesis explores the performance of a modern ’combi-wall’ supported deep excavation, and its interaction with the neighbouring soil and internal support structures, using a combination of field monitoring and numerical analysis. The field monitoring scheme involved instrumenting a 12 m deep excavation in soft clays and peats for a deep underground waste storage bunker for the PROTOS Energy-from-Waste Facility in Chester, UK. The deep excavation was supported by a complex ’combi-wall’ cofferdam, a reinforced concrete (RC) capping beam, and two levels of internal bracing, and its performance was assessed through measured wall deflections, bracing member loads, and site and bunker water levels. The permanent bunker RC structure was constructed within the excavation and was instrumented to monitor temperatures and strains using strain gauges and novel fibre optic monitoring systems. The monitoring scheme provided the site team with real-time feedback to inform construction decisions and promote a proactive approach to risk mitigation. The monitored data provide new insights into the ...
Investigation of soil-structure interaction for deep excavations
Deep excavations are widely adopted in infrastructure projects for the construction of underground storage, deep foundations, basements, and launch and reception pits for tunnel boring machines for the transport, water and wastewater, energy, and commercial and industrial building sectors. Deep excavations typically comprise an in situ concrete or driven steel earth retaining wall braced with support structures including steel frames and ground anchorages. Rapid population growth in urban areas is driving the increasing depth and complexity of deep excavations, which is increasing the likelihood and severity of risks associated with ground deformations. Therefore, it is important that understanding of the performance of these structures, and the predictive tools used in their design, are improved through more sophisticated approaches, including complex three-dimensional (3D) numerical analyses and real-time monitoring systems. This thesis explores the performance of a modern ’combi-wall’ supported deep excavation, and its interaction with the neighbouring soil and internal support structures, using a combination of field monitoring and numerical analysis. The field monitoring scheme involved instrumenting a 12 m deep excavation in soft clays and peats for a deep underground waste storage bunker for the PROTOS Energy-from-Waste Facility in Chester, UK. The deep excavation was supported by a complex ’combi-wall’ cofferdam, a reinforced concrete (RC) capping beam, and two levels of internal bracing, and its performance was assessed through measured wall deflections, bracing member loads, and site and bunker water levels. The permanent bunker RC structure was constructed within the excavation and was instrumented to monitor temperatures and strains using strain gauges and novel fibre optic monitoring systems. The monitoring scheme provided the site team with real-time feedback to inform construction decisions and promote a proactive approach to risk mitigation. The monitored data provide new insights into the ...
Investigation of soil-structure interaction for deep excavations
Hensman, P (Autor:in) / Sheil, B / Byrne, B / Burd, H / Long, M
07.01.2025
doi:10.5287/ora-2rrbjmkzk
Hochschulschrift
Elektronische Ressource
Englisch
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