A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Analyzing Different Methods to Model a Marine Mattress on a Partially Submerged Slope
Earth and rock-filled gabions have valuable applications in engineered dams, walls, and foundations, as well as for erosion control and military force protection. A gabion mattress, also commonly known as a marine mattress, is a variation of the gabion that utilizes geosynthetic materials with a relatively small height compared to its much larger length and width dimensions. While gabion baskets and walls are typically used for slope stability, marine mattresses are primarily used to protect against erosion and wave action along slopes. While uplift stability and down-slope sliding are two concerns to be mitigated when incorporating a marine mattress into designs, the presence of a marine mattress on a slope affects the underlying slope’s stability. Slope stability analyses are essential for design of sloped applications of marine mattresses, particularly on soft soils, and the ability to accurately set up analysis software to aid in geotechnical design is crucial in making sound engineering recommendations. While there is some information in the literature regarding slope stability regarding gabion boxes baskets and walls, as well as geosynthetics and revetment stone layers along slopes, there is limited information on modelling revetment stone filled geosynthetic gabion mattresses along a slope. In their recent 2021 software update, the limit equilibrium software used in performing the analysis introduced a reinforcement library to choose specific manufactured geosynthetic products. This consists of a limited selection of products from two manufacturers. While geogrids are not included, a marine mattress was not included in the updated version. In this study, the stability of a partially submerged marine mattress was analyzed in five potential ways including modelling as (1) a high-strength material, (2) an unreinforced layer of revetment stone, (3) a layer of revetment stone enveloped by a geosynthetic material, (4) a layer of revetment stone enveloped by a specific manufactured geo-grid, and (5) a surcharge load with the same unit weight as the revetment stone layer. The advantages and disadvantages of each modeling scenario are discussed, and factors of safety for global failure are compared.
Analyzing Different Methods to Model a Marine Mattress on a Partially Submerged Slope
Earth and rock-filled gabions have valuable applications in engineered dams, walls, and foundations, as well as for erosion control and military force protection. A gabion mattress, also commonly known as a marine mattress, is a variation of the gabion that utilizes geosynthetic materials with a relatively small height compared to its much larger length and width dimensions. While gabion baskets and walls are typically used for slope stability, marine mattresses are primarily used to protect against erosion and wave action along slopes. While uplift stability and down-slope sliding are two concerns to be mitigated when incorporating a marine mattress into designs, the presence of a marine mattress on a slope affects the underlying slope’s stability. Slope stability analyses are essential for design of sloped applications of marine mattresses, particularly on soft soils, and the ability to accurately set up analysis software to aid in geotechnical design is crucial in making sound engineering recommendations. While there is some information in the literature regarding slope stability regarding gabion boxes baskets and walls, as well as geosynthetics and revetment stone layers along slopes, there is limited information on modelling revetment stone filled geosynthetic gabion mattresses along a slope. In their recent 2021 software update, the limit equilibrium software used in performing the analysis introduced a reinforcement library to choose specific manufactured geosynthetic products. This consists of a limited selection of products from two manufacturers. While geogrids are not included, a marine mattress was not included in the updated version. In this study, the stability of a partially submerged marine mattress was analyzed in five potential ways including modelling as (1) a high-strength material, (2) an unreinforced layer of revetment stone, (3) a layer of revetment stone enveloped by a geosynthetic material, (4) a layer of revetment stone enveloped by a specific manufactured geo-grid, and (5) a surcharge load with the same unit weight as the revetment stone layer. The advantages and disadvantages of each modeling scenario are discussed, and factors of safety for global failure are compared.
Analyzing Different Methods to Model a Marine Mattress on a Partially Submerged Slope
Haefeli, Michael (author) / Schaal, Christopher (author)
Geo-Congress 2022 ; 2022 ; Charlotte, North Carolina
Geo-Congress 2022 ; 544-552
2022-03-17
Conference paper
Electronic Resource
English
Analyzing Different Methods to Model a Marine Mattress on a Partially Submerged Slope
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