Ao engajar-se nas diversas formas de interação face a face, os interagentes devem considerar uma série de regras linguísticas, contextuais e interacionais para assegurar sua plena execução. Ainda que as regras conversacionais sejam culturalmente pré-definidas, as diversas situações interacionais criam, inevitavelmente, conflitos que podem oferecer perigo à imagem pública do locutor, assim como a do interlocutor. Para preservar a imagem de ambos, amenizar ou mesmo evitar as tensões nas interações verbais, são colocadas em prática estratégias de polidez verbal, que podem ser definidas como identidade social expressa em conduta verbal. O presente trabalho visa a estudar o funcionamento de alguns procedimentos conversacionais de atenuação como estratégia fundamental à realização harmoniosa de uma interação verbal. Desse modo, a compreensão do papel que desempenha a polidez verbal em determinada cultura pode ser determinante para o êxito do objetivo pretendido em uma troca conversacional, afinal, cada grupo social possui um perfil comunicativo que o caracteriza. Para tanto, foram analisadas entrevistas televisivas realizadas por falantes de língua francesa (França) e também portuguesa (Brasil) para observar quais estratégias de polidez negativa são empregadas em cada uma dessas culturas em situações de confronto. A partir da classificação proposta por Kerbrat-Orecchioni (1996, 2005) que tem em Brown e Levinson (1978, 1987) suas principais referências, procurou-se identificar as diferenças e as semelhanças dos procedimentos de atenuação colocados em ação em ambas as línguas. Nos casos observados, verificou-se certa tendência entre os falantes de língua portuguesa à contemporização de seus enunciados, o que pode denotar uma maior disposição em preservar a face de seu interlocutor, talvez para proteger a própria face. / By engaging in various forms of face to face interaction, the interactants must consider a number of linguistic rules, contextual and interactive, in order to ensure its full implementation. Although the conversational rules are culturally pre-defined, the various interactional situations create, inevitably, conflicts that may cause danger to the speaker and the interlocutor\'s public image. To preserve the image of both, to reduce or even avoid tensions in verbal interactions, verbal politeness strategies are put into practice, which can be defined as a social identity expressed in verbal behavior. The present work aims to study the functioning of some conversational mitigation procedures as a key strategy to achieve a harmonious verbal interaction. Thus, understanding the role played by verbal politeness in a particular culture can be crucial to the success of the intended purpose in a conversational exchange, after all, each social group has a communication profile that characterizes it. Thus, we analyzed television interviews conducted by speakers of French (France) and Portuguese (Brazil) in order to examine which negative politeness strategies are employed in each of these cultures in a confrontational situation. Based on the classification proposed by Kerbrat-Orecchioni (1996, 2005) which has in Brown and Levinson (1978, 1987) its main references, we sought to identify the differences and similarities of the mitigation procedures put into action in both languages. In the studied cases, we observed a tendency among the Portuguese-speaking people to compromise their statements, which may reflect a greater willingness to preserve their interlocutors face, perhaps to protect their own face.

Ao engajar-se nas diversas formas de interação face a face, os interagentes devem considerar uma série de regras linguísticas, contextuais e interacionais para assegurar sua plena execução. Ainda que as regras conversacionais sejam culturalmente pré-definidas, as diversas situações interacionais criam, inevitavelmente, conflitos que podem oferecer perigo à imagem pública do locutor, assim como a do interlocutor. Para preservar a imagem de ambos, amenizar ou mesmo evitar as tensões nas interações verbais, são colocadas em prática estratégias de polidez verbal, que podem ser definidas como identidade social expressa em conduta verbal. O presente trabalho visa a estudar o funcionamento de alguns procedimentos conversacionais de atenuação como estratégia fundamental à realização harmoniosa de uma interação verbal. Desse modo, a compreensão do papel que desempenha a polidez verbal em determinada cultura pode ser determinante para o êxito do objetivo pretendido em uma troca conversacional, afinal, cada grupo social possui um perfil comunicativo que o caracteriza. Para tanto, foram analisadas entrevistas televisivas realizadas por falantes de língua francesa (França) e também portuguesa (Brasil) para observar quais estratégias de polidez negativa são empregadas em cada uma dessas culturas em situações de confronto. A partir da classificação proposta por Kerbrat-Orecchioni (1996, 2005) que tem em Brown e Levinson (1978, 1987) suas principais referências, procurou-se identificar as diferenças e as semelhanças dos procedimentos de atenuação colocados em ação em ambas as línguas. Nos casos observados, verificou-se certa tendência entre os falantes de língua portuguesa à contemporização de seus enunciados, o que pode denotar uma maior disposição em preservar a face de seu interlocutor, talvez para proteger a própria face. / By engaging in various forms of face to face interaction, the interactants must consider a number of linguistic rules, contextual and interactive, in order to ensure its full implementation. Although the conversational rules are culturally pre-defined, the various interactional situations create, inevitably, conflicts that may cause danger to the speaker and the interlocutor\'s public image. To preserve the image of both, to reduce or even avoid tensions in verbal interactions, verbal politeness strategies are put into practice, which can be defined as a social identity expressed in verbal behavior. The present work aims to study the functioning of some conversational mitigation procedures as a key strategy to achieve a harmonious verbal interaction. Thus, understanding the role played by verbal politeness in a particular culture can be crucial to the success of the intended purpose in a conversational exchange, after all, each social group has a communication profile that characterizes it. Thus, we analyzed television interviews conducted by speakers of French (France) and Portuguese (Brazil) in order to examine which negative politeness strategies are employed in each of these cultures in a confrontational situation. Based on the classification proposed by Kerbrat-Orecchioni (1996, 2005) which has in Brown and Levinson (1978, 1987) its main references, we sought to identify the differences and similarities of the mitigation procedures put into action in both languages. In the studied cases, we observed a tendency among the Portuguese-speaking people to compromise their statements, which may reflect a greater willingness to preserve their interlocutors face, perhaps to protect their own face.

Le travail de thèse présenté dans ce mémoire vise à analyser et à comprendre les mécanismes mis en jeu au niveau de l’impact du creusement d’un tunnel par bouclier à front pressurisé sur des fondations profondes avoisinantes. Cette thèse a été réalisée dans le cadre du projet européen NeTTUN, au sein du Laboratoire de Tribologie et de Dynamique des Systèmes (LTDS) de l’ENTPE. L’approche phénoménologique conduite lors de ces travaux repose sur deux importantes campagnes expérimentales réalisées à l’aide d’un dispositif unique au plan international de modèle réduit 1g de tunnelier à pression de terre (échelle de l’ordre de 1/10eme). La forte originalité de ce dispositif est de pouvoir simuler de façon réaliste les principales étapes du processus tridimensionnel d’excavation mécanisé d’un tunnel. Dans le cadre de cette thèse, le dispositif existant de modèle réduit de tunnelier a dans un premier temps été reconfiguré afin de pouvoir répondre aux besoins du programme expérimental envisagé. Des modèles physiques de fondations profondes (pieux et groupes de pieux) et de barrières de protection ont été conçus dans le cadre des lois de similitude, fabriqués et instrumentés. Deux campagnes expérimentales d’envergure ont été réalisées en massif de sable sec : l’une concerne les effets du passage d’un tunnelier à front pressurisé sur des fondations profondes avoisinantes (pieux, groupe de pieux), l’autre traite de l’efficacité de barrières de protection (parois moulées) utilisées pour limiter ces effets. Différents paramètres qui influencent l’interaction tunnelier - sol - fondations ont été considérés comme la distance relative tunnel / fondation, la pression frontale de soutènement appliquée par le TBM sur le terrain ou encore la hauteur des barrières de protection. L’analyse phénoménologique menée à l’échelle du modèle concerne en particulier l’évolution des champs de contraintes et de déplacements dans le terrain autour du tunnelier, les déplacements relatifs sol - pieu et sol- barrière, la redistribution des efforts au sein des fondations. L’importante base de données et d’analyse ainsi constituée a été mise à profit pour la validation d’outils de modélisation numérique développés par l’Université de Rome au sein du projet NeTTUN. / The major goal presented in this thesis was to analyze and investigate the mechanisms, which are involved in the impact of the tunnels excavated thanks to an Earth Pressure Balanced Shield on nearby deep foundations. This thesis was realized in European project NeTTUN and the work had been done in the Laboratory of Tribology and Systems Dynamics (LTDS) of ENTPE. During these works, phenomenological approach was based on two important experimental campaigns carried out using a unique device at the international level of a 1g scale model of earth-pressure tunnel boring machine (scale of the order of 1 / 10). The state of the art of this device was to be able to simulate in possibly realistic way the main stages of the three-dimensional process of mechanized excavation of a tunnel. In the framework of this thesis, the existing model tunneling machine device was initially reconfigured in order to reach the expectations of the experimental program envisaged. Physical models of deep foundations (piles and groups of piles) and protective barriers were designed under the similitude laws, manufactured and instrumented. The two large-scale experimental campaigns have been carried out in a dry sand massif. The first one concerned the effects of the passage of a pressurized tunnel boring machine on nearby deep foundations (piles, group of piles), whereas another one dealed with the effectiveness of mitigation procedure (diaphragm walls) used to limit these effects. Different parameters that influenced on the tunneling: soil - foundation interaction considered as the relative tunnel / foundation distance, the frontal face pressure applied by the TBM in the field or the height of the protective barriers. The phenomenological analysis carried out at the scale of the model concerned in particular the evolution of the fields of stresses and displacements in the ground around the tunnel boring machine, relatives pile / soil and wall / soil displacements and the redistribution of stresses along the pile foundations. The large database and analysis constituted was used for the validation of numerical modeling tools developed by the University of Rome within the NeTTUN project.