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Research Article

Analytical quantification of airflows from soil through building substructures

Thierno M.O. Diallo1,2( )Bernard Collignan1Francis Allard2
CSTB Health Division, 84 avenue Jean-Jaurès, 77447 Marne-la-Vallée, France
University of La Rochelle-(LaSIE, FRE-CNRS 3474), Avenue Michel Crépeau, 17042 La Rochelle, France
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Abstract

Soil gas pollutants (VOCs, radon,...) have long been known to intrude into buildings through various openings, e.g., cracks and gaps in the foundations. As yet no model has been developed which can quantify this rate of flow whilst taking into account various substructure configurations. This is due to the complex phenomena that need to be consider and particularly to the difficulty in estimating pollutant flows at soil-building interfaces. In this paper analytical models have been developed to quantify these flows. The models have been developed for some typical substructure configurations: slab-on-grade, basement and crawlspace. The inputs of these models include particularly the foundation wall depth and the slab permeability. The analytical models have been compared to existing analytical models for one of the configurations. Moreover a 2-D finite element model has been used for numerical comparison. The models are presented as pressure-flow relationships and can be integrated into risk assessment tools in order to study the impact of soil gas pollutants on indoor air quality.

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Building Simulation
Pages 81-94
Cite this article:
Diallo TM, Collignan B, Allard F. Analytical quantification of airflows from soil through building substructures. Building Simulation, 2013, 6(1): 81-94. https://doi.org/10.1007/s12273-012-0095-2

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Received: 06 June 2012
Revised: 02 August 2012
Accepted: 08 August 2012
Published: 20 October 2012
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012
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