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Accidents géotechniques des tunnels et des ouvrages souterrains - Méthodes analytiques pour le retour d'expérience et la modélisation numérique

Abstract : The instability of the underground works is an important cause of many accidents during their construction and exploitation. Experience feedback of previous accidents is one of used methods that allows improving the prevention of such accidents during the design and the construction of new underground works projects. A bibliographical search enabled us to establish a database of tunnels and underground constructions accidents in the world. These database contains currently 230 case related to the two phases of construction and exploitation of underground constructions, each case was characterized by several variables associated to instability phenomena, to geometrical and géomechanicals characteristics of the concerned underground construction. The causes and the consequences of instabilities phenomena were also analysed especially those related to the particular geological context and the géotechnical characteristics of the surrounding ground. The established database enabled us to carry out several analyses on instabilities phenomena like as a factorial correspondence analysis, which aims to discover the relations between instabilities phenomena and their explanatory variables. This study proposes two representative numerical models of vaulted tunnels supported by masonry structure. Biased on the numerical simulation and the experimental design technique, it also relates to the analysis of the mechanical behaviour of the masonry structure support and its evolution in the time, where the influence of certain mechanical parameters of masonry structure was quantified and evaluated by various analyses methods such as multivariate variance analysis and the linear modelling by multiple regression
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Submitted on : Thursday, March 29, 2018 - 1:59:10 PM
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Jamal Idris. Accidents géotechniques des tunnels et des ouvrages souterrains - Méthodes analytiques pour le retour d'expérience et la modélisation numérique. Autre. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL070N⟩. ⟨tel-01752827⟩

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