Jet grouting underpinning of a building on a marl embankment platform

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The platforms for the construction of an industrial plant near Coimbra, Portugal, were partly in excavation and partly in a marl embankment. After the construction of a nearly 20m building structure and a significant rainy period, important differential settlements occurred with serious damage to the structure. Therefore, it was necessary to assess a solution to strengthen and stabilize the foundation. The implemented solution included the underpinning of each footing by four jet grouting columns and the repair of the concrete structure. In this paper, the geotechnical characteristics of the different affected soils, the monitoring results prior to the jet grouting works, the design of the underpinning and the monitoring of the structure after the repair works completion are presented and discussed.
Original languageUnknown
Title of host publicationGeotechnics for Sustainable Development
EditorsPhung Duc Long
Place of PublicationHanoi
PublisherConstruction Publishing House
ISBN (Print)978-604-82-0013-8
Publication statusPublished - 1 Jan 2013

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