Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
External Stability of Geotubes Subjected to Wave Loading
Geotubes used as shoreline protective structures are formed using geotextile material that is hydraulically filled with soil to form desired dimensions. Historically, these structures are mainly used in the US for the dewatering of wet soils, and there is a focus in the literature on the internal stability aspects where filling pressure is specified such that rupture does not occur. After the 2008 Hurricane Ike hit on Galveston, failure of geotubes was observed in differential lateral displacement and rotation modes as well as due to the scour of the underlying foundation soil. External stability of geotubes is studied in this paper considering the effects of wave loading with the rising water level due to the storm surge. Results indicated that limit equilibrium analysis yielded factors of safety less than unity, yet, in some cases functionality is preserved as the lateral deformation can be tolerated and the height of the structure is maintained. Based on the parameters assumed in this paper performance aspects can be preserved during storm loading if the soil used to form the geotube is engineered to have soil elasticity modulus more than 1 MPa, and soil unit weight higher than 18 kN/m3. At these values, the geotube exhibited the attributes of a rigid body response, with a minimal distortion of shape under the applied loading.
External Stability of Geotubes Subjected to Wave Loading
Geotubes used as shoreline protective structures are formed using geotextile material that is hydraulically filled with soil to form desired dimensions. Historically, these structures are mainly used in the US for the dewatering of wet soils, and there is a focus in the literature on the internal stability aspects where filling pressure is specified such that rupture does not occur. After the 2008 Hurricane Ike hit on Galveston, failure of geotubes was observed in differential lateral displacement and rotation modes as well as due to the scour of the underlying foundation soil. External stability of geotubes is studied in this paper considering the effects of wave loading with the rising water level due to the storm surge. Results indicated that limit equilibrium analysis yielded factors of safety less than unity, yet, in some cases functionality is preserved as the lateral deformation can be tolerated and the height of the structure is maintained. Based on the parameters assumed in this paper performance aspects can be preserved during storm loading if the soil used to form the geotube is engineered to have soil elasticity modulus more than 1 MPa, and soil unit weight higher than 18 kN/m3. At these values, the geotube exhibited the attributes of a rigid body response, with a minimal distortion of shape under the applied loading.
External Stability of Geotubes Subjected to Wave Loading
Khalilzad, M. (Autor:in) / Gabr, M. A. (Autor:in)
Georisk 2011 ; 2011 ; Atlanta, Georgia, United States
GeoRisk 2011 ; 1044-1054
21.06.2011
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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