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Interpretation of an artificial ground freezing field trial at Fori Imperiali in Rome

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Titel: Interpretation of an artificial ground freezing field trial at Fori Imperiali in Rome
Autoren: Giulia Guida, Arianna Pucci, Eliano Romani, Giulia M.B. Viggiani, Francesca Casini
Quelle: Underground Space, Vol 23, Iss, Pp 89-112 (2025)
Verlagsinformationen: Elsevier BV, 2025.
Publikationsjahr: 2025
Schlagwörter: Numerical modelling, Heat transfer, Artificial ground freezing, TA703-712, Engineering geology. Rock mechanics. Soil mechanics. Underground construction, Tunnelling
Beschreibung: This paper describes a field trial of artificial ground freezing (AGF) carried out in connection with the construction of Line C of Roma underground. AGF was one of the options considered for the temporary stabilisation of the ground during the excavation of Colosseo-Fori Imperiali Station. The field trial aimed at assessing the feasibility of AGF in the complex soil profile and groundwater regime of the subsoil of the historical centre of Roma by establishing the response of the subsoil to the imposed freezing loads, the ability to create a continuous frozen wall, and the associated coolant consumption. The extensive monitoring data were exploited to conduct a detailed analysis of the transient freezing process in the stratified subsoil and used to develop and validate a three-dimensional thermo-hydraulic numerical model. Special attention was given to defining and applying appropriate boundary conditions at the freezing pipes. The paper discusses the main factors affecting the time-dependent freezing process and explores the applicability of simplified two-dimensional models for the Fori Imperiali AGF field trial.
Publikationsart: Article
Sprache: English
ISSN: 2467-9674
DOI: 10.1016/j.undsp.2024.12.006
Zugangs-URL: https://doaj.org/article/0750e965902c416db50be50bcecb083d
Rights: CC BY NC ND
Dokumentencode: edsair.doi.dedup.....5f63c076c8974d194091bb1c9106f5bf
Datenbank: OpenAIRE
Beschreibung
Abstract:This paper describes a field trial of artificial ground freezing (AGF) carried out in connection with the construction of Line C of Roma underground. AGF was one of the options considered for the temporary stabilisation of the ground during the excavation of Colosseo-Fori Imperiali Station. The field trial aimed at assessing the feasibility of AGF in the complex soil profile and groundwater regime of the subsoil of the historical centre of Roma by establishing the response of the subsoil to the imposed freezing loads, the ability to create a continuous frozen wall, and the associated coolant consumption. The extensive monitoring data were exploited to conduct a detailed analysis of the transient freezing process in the stratified subsoil and used to develop and validate a three-dimensional thermo-hydraulic numerical model. Special attention was given to defining and applying appropriate boundary conditions at the freezing pipes. The paper discusses the main factors affecting the time-dependent freezing process and explores the applicability of simplified two-dimensional models for the Fori Imperiali AGF field trial.
ISSN:24679674
DOI:10.1016/j.undsp.2024.12.006