Personne :
Doyle, Michael Robert

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Michael Robert
Université Laval. École d'architecture
Identifiant Canadiana

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Voici les éléments 1 - 4 sur 4
  • Publication
    Accès libre
    Embodied energy and lifecycle costs : questioning (Mis)conceptions about underground construction
    (Cedar Rapids, 2019-08-15) Doyle, Michael Robert; Thalmann, Philippe; Parriaux, Aurèle
    In the construction community, underground construction is perceived as being significantly more costly and more energy-consuming than comparable surface construction. Although the literature is scarce, studies that have attempted to quantify this difference tend to compare built projects in heterogeneous conditions. The objective of this article is to present the results of life cycle cost and energy consumption simulations conducted as part of the Deep City project at the École Polytechnique fédérale de Lausanne in Switzerland. This article begins by examining the preconceptions the construction industry seems to have about underground construction as reported in the press from 2007 to 2017. Then, we present the method and results of two unpublished studies on the differences in costs and energy consumption of a hypothetical commercial building project in two different geological contexts. We find that energy consumption can be 15% higher but also 4% lower. We also find that underground construction in unconsolidated sediment ground is approximately 23% more expensive, while only 10% in bedrock, which is significantly lower than the 200% to 300% differentials reported in previous studies. We attribute this to the level of detail of our studies, the inclusion of ground conditions, and conclude that our results help to dispel certain misconceptions about underground construction, which can contribute positively to urban sustainable development goals.
  • Publication
    Accès libre
    Construire en sous-sol : un bilan économique
    (SEATU - Société des éditions des associations techniques universitaires, 2020-12-01) Doyle, Michael Robert; Parriaux, Aurèle; Thalmann, Philippe
    La construction souterraine n’est pas beaucoup plus coûteuse qu’en surface : telle est la thèse que soutiennent les auteurs de cette étude comparative de différents scénarios d’une construction fictive en surface ou souterraine. Elle devrait permettre de dissiper certaines idées erronées sur la construction en sous-sol, alors que cette stratégie, qui contribue à réduire l’étalement urbain, s’apprête à entrer dans les politiques urbaines.
  • Publication
    Accès libre
    Underground potential for urban sustainability : mapping resources and their interactions with the deep city method.
    (MDPI, 2016-08-25) Doyle, Michael Robert; Thalmann, Philippe; Parriaux, Aurèle
    In the process of urban growth, the underground is often only addressed once all surface alternatives have been exhausted. Experience shows that this can lead to unforeseen conflicts (e.g., subsidence, groundwater pollution) and to lost opportunities (e.g., combined geothermal systems and building foundations or recycling of excavation materials). One challenge is how the underground potentials are assessed by urban actors; data collection, analysis and visualization for the different resources are often conducted in separate disciplinary corners and administrative divisions. This paper presents a mapping method developed within the Deep City project at the Swiss Federal Institute of Technology in Lausanne (EPFL) and its application to San Antonio, Texas. San Antonio is interesting in its lack of major underground infrastructure and its few means and political support for short-term underground development. We will specifically look at the production of a series of interaction maps, an original mapping strategy that is complementary to the resource potential maps we have produced in prior work. After situating this research within larger theoretical and philosophical questions, we will show how mapping the combined potentiality of underground resources can serve as a compass for future interdisciplinary discussions that address the urban underground as a source of opportunity, rather than as an afterthought.
  • Publication
    Accès libre
    À la recherche de la densité optimale
    (Presses polytechniques et universitaires romandes, 2013-01-01) Thalmann, Philippe; Doyle, Michael Robert
    Même si les propriétaires fonciers préfèrent en général disposer de droits à bâtir plus importants, les promoteurs ne les utilisent pas toujours entièrement. Cela complique la planification urbaine pour les autorités. Mais celles-ci ne savent pas toujours comment fixer des objectifs de densité. Les multiples critères du développement durable, tel qu’ils interviennent dans un projet de quartier durable, compliquent encore les choses. Ce chapitre analyse la question de la densité optimale du point de vue des autorités et du point de vue du promoteur. Il pose également un regard spécifique sur les visions développées pour le secteur de Waldstadt à Berne.