Post-Event Site Investigation, Monitoring, Stability Analysis, and Modeling of a Gas Pipeline Explosion
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- 作者：Gianfranco Totani ; Ferdinando Totani…
- 关键词：Gas pipeline ; Explosion ; Stability analysis ; Built ; up slope ; Pipe analysis
- 刊名：Journal of Failure Analysis and Prevention
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：17
- 期：1
- 页码：86-92
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Tribology, Corrosion and Coatings; Characterization and Evaluation of Materials; Classical Mechanics; Structural Mechanics; Quality Control, Reliability, Safety and Risk;
- 出版者：Springer US
- ISSN：1864-1245
- 卷排序：17
文摘
This paper describes the results of site investigations, monitoring, stability analyses, and soil-pipe interaction modeling of a built-up slope located near Pineto (Abruzzo Province, Central Italy), where a gas pipeline exploded on March 6th, 2015, due to heavy rains inducing slope movements. The slope is formed by OC clay, covered with an upper 10- to 14-m-thick clayey-sandy silt colluvial layer. The explosion in the upper portion of the slope caused extensive damage to existing buildings and threatened human lives. Soon after the event, a site investigation and monitoring program was carried out. A detailed topographic survey and hydrological data were analyzed in order to characterize possible critical rainfall events. The stability of the slope was analyzed both in pre- and in post-explosion conditions. The profiles of the DMT horizontal stress index KD helped to identify multiple slip surfaces. Then, the results of the site investigation and stability analyses were used to implement a simplified finite element model aimed to describe the soil-pipeline interaction, taking into account the role of the observed wrinkle in the pipeline. The numerical simulations reveal the crucial role played by the slope movements, and by the wrinkle as well, in inducing the collapse of the pipe.