Remediation of uncontrolled inflows caused by technical failures in deep excavations
Dewatering for water table control may cause undesirable effects on adjacent properties, the site or the environment. Risks include inflows and seepage that could result from the existence of confined aquifers that were deemed unimportant at the project stage. We describe three cases of excavations...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/398629 |
| Acceso en línea: | http://hdl.handle.net/10261/398629 https://api.elsevier.com/content/abstract/scopus_id/105013975368 |
| Access Level: | acceso abierto |
| Palabra clave: | Urban hydrogeology Dewatering Drainage Excavation Underground construction http://metadata.un.org/sdg/11 http://metadata.un.org/sdg/9 http://metadata.un.org/sdg/6 Ensure availability and sustainable management of water and sanitation for all Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation Make cities and human settlements inclusive, safe, resilient and sustainable |
| Sumario: | Dewatering for water table control may cause undesirable effects on adjacent properties, the site or the environment. Risks include inflows and seepage that could result from the existence of confined aquifers that were deemed unimportant at the project stage. We describe three cases of excavations with problems associated with inflows caused by such aquifers and pre-existing unsealed boreholes. In addition, in two of the cases, problems were worsened by the compartmentalization effect caused by internal foundation elements that limit horizontal flow to the extraction wells. For each case, we discuss solution methodologies. These range from pumping the deep aquifer, laying high permeability layers at the excavation bottom, and sealing the abandoned borehole, which we describe in detail. We conclude that, when there is consensus between theoretical knowledge and practical experience, creative solutions can be applied to overcome the situation in a reasonable way, even in unforeseen situations. |
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