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Stress measurement in partially saturated soils and its application to physical modeling of tunnel excavation

BERTHOZ, Nicolas ; BRANQUE, Denis ; WONG, Henry ; SUBRIN, Didier

Canadian geotechnical journal, 2013-10, Vol.50 (10), p.1077-1087 [Periódico revisado por pares]

Ottawa, ON: NRC Research Press

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Título:
Stress measurement in partially saturated soils and its application to physical modeling of tunnel excavation
Autor: BERTHOZ, Nicolas ; BRANQUE, Denis ; WONG, Henry ; SUBRIN, Didier
Assuntos: arching effect ; Calibration ; calibration test ; capteur de contrainte ; creusement de tunnels ; Density ; Earth sciences ; Earth, ocean, space ; effets de voûte ; Engineering ; Engineering and environment geology. Geothermics ; Engineering geology ; Exact sciences and technology ; Geotechnology ; Grain size ; granular material ; Load ; matériaux granulaires ; Measurement ; mesure des contraintes dans les sols ; Methods ; modélisation physique ; partially saturated soil ; physical modeling ; soft ground ; soil stress measurement ; soil stress sensor ; Soil structure ; Soils ; sols partiellement saturés ; Stress analysis ; Stress analysis (Engineering) ; terrains meubles ; Tunneling ; étalonnages
É parte de: Canadian geotechnical journal, 2013-10, Vol.50 (10), p.1077-1087
Descrição: The capacity of a commercially available miniature pressure sensor for measuring stress evolutions in a partially saturated soil under quasi-static loads is studied, in view of its later application in laboratory-scale physical models. An extensive calibration program is first performed on a triaxial cell under isotropic loadings. These calibration tests provide useful data for assessing the uncertainty in stress measurements, especially in the case of partially saturated granular materials. Notably, influences of soil density, water content, and average grain size on stress measurements are quantified. Following these tests, an example of stress measurements on an original reduced-scale model of “earth pressure balance shield” (EPBS) is presented, which involves three-dimensional arching effects developing around the shield during excavation.
Editor: Ottawa, ON: NRC Research Press
Idioma: Inglês

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Stress measurement in partially saturated soils and its application to physical modeling of tunnel excavation

BERTHOZ, Nicolas ; BRANQUE, Denis ; WONG, Henry ; SUBRIN, Didier

Ottawa, ON: NRC Research Press

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