Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pore Pressures in Vertical Breakwater Foundations
When calculating the stability of a breakwater foundation information on the pore pressures directly underneath the caisson in the bedding layer and in the sand layer is needed. In this paper easy to handle calculation techniques are presented to derive the pore pressures underneath the caisson. A quasi-stationary calculation technique has been verified for the situation of a caisson breakwater, by a hind cast of laboratory tests. The differences between the quasi-stationary calculations and the laboratory measurements appear to be small and can be explained by non-stationary effects. The pore pressure distribution in real cases may considerably deviate from the traditionally assumed triangular distribution, due to several effects. Non-stationary effects are only relevant if the rubble is relatively fine and wave impact occurs. The pore pressures in the sand layer have been studied by centrifuge tests. Two types of pore pressure development can be distinguished, the instantaneous pore pressures, which follow the wave action at sea and the residual pore pressures, which gradually develop under repetition of loading. The residual pore pressures may lead to liquefaction if silt or fine sand is present in the subsoil.
Pore Pressures in Vertical Breakwater Foundations
When calculating the stability of a breakwater foundation information on the pore pressures directly underneath the caisson in the bedding layer and in the sand layer is needed. In this paper easy to handle calculation techniques are presented to derive the pore pressures underneath the caisson. A quasi-stationary calculation technique has been verified for the situation of a caisson breakwater, by a hind cast of laboratory tests. The differences between the quasi-stationary calculations and the laboratory measurements appear to be small and can be explained by non-stationary effects. The pore pressure distribution in real cases may considerably deviate from the traditionally assumed triangular distribution, due to several effects. Non-stationary effects are only relevant if the rubble is relatively fine and wave impact occurs. The pore pressures in the sand layer have been studied by centrifuge tests. Two types of pore pressure development can be distinguished, the instantaneous pore pressures, which follow the wave action at sea and the residual pore pressures, which gradually develop under repetition of loading. The residual pore pressures may lead to liquefaction if silt or fine sand is present in the subsoil.
Pore Pressures in Vertical Breakwater Foundations
Zwanenburg, C. (Autor:in) / de Groot, M.B. (Autor:in) / Kvalstad, T.J. (Autor:in) / van Hoven, A. (Autor:in)
26th International Conference on Coastal Engineering
Coastal Engineering 1998 ; 2110-2123
26.04.1999
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Pore Pressures in Vertical Breakwater Foundations
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