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Influence of domestic sewage leakage on the collapse of tropical soils

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Abstract

In the studied region, 35% of the soil collapses are related to leakage from sewage ducts. The paper describes the soils from this part of Brazil and a series of laboratory tests undertaken using water and domestic sewage fluid as the wetting agents. It is considered that the presence of soaps and detergents as recorded by the sodium concentration facilitates the densification of the soils and hence has a major effect on the surface settlement/collapse.

Résumé

Dans la région étudiée, 35% des affaissements de terrain sont dus à des fuites de canalisations d’égouts. L’article décrit les sols de cette région du Brésil et un ensemble de tests de laboratoire réalisés en utilisant soit de l’eau du robinet, soit des eaux usées comme agent d’humidification des sols. On peut considérer que la présence de savons et de détergents, comme indiqué par les concentrations en sodium, facilite la densification des sols et de ce fait ont un effet important sur les processus de tassement et d’affaissement des terrains.

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Acknowledgments

The authors are grateful to FAPESP who provided the resources (research funds and master scholarship) to conduct this work.

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Correspondence to José Augusto de Lollo.

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Rodrigues, R.A., de Lollo, J.A. Influence of domestic sewage leakage on the collapse of tropical soils. Bull Eng Geol Environ 66, 215–223 (2007). https://doi.org/10.1007/s10064-006-0065-y

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  • DOI: https://doi.org/10.1007/s10064-006-0065-y

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