Predicting subsidence of cohesive and granular soil layers reinforced by geosynthetic
| Autor: | Fabrice Emeriault, Abbas Farhat, Pascal Villard, Marwan Al Heib, Mouhamad Hassoun |
|---|---|
| Přispěvatelé: | Institut National de l'Environnement Industriel et des Risques (INERIS), Laboratoire sols, solides, structures - risques [Grenoble] (3SR), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), GéoMécanique, Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Sinkhole
0208 environmental biotechnology Soil Science 02 engineering and technology 010501 environmental sciences 01 natural sciences Environmental Chemistry Geotechnical engineering ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology Global and Planetary Change geography geography.geographical_feature_category Deformation (mechanics) [SPI.GCIV.GEOTECH]Engineering Sciences [physics]/Civil Engineering/Géotechnique Foundation (engineering) Geology Subsidence Overburden pressure Pollution 020801 environmental engineering Soil water Soil horizon Intensity (heat transfer) |
| Zdroj: | Environmental Earth Sciences Environmental Earth Sciences, Springer, 2021, 80 (2), ⟨10.1007/s12665-020-09350-3⟩ |
| ISSN: | 1866-6280 1866-6299 |
| Popis: | Subsidence can result from the collapse of underground cavities. The impact of such subsidence on existing structures and infrastructures is generally dramatic. Geosynthetic reinforcement (GSY) is an attractive mitigation solution that can be used to reduce this impact. This paper focuses on the mitigation solutions over existing cavities mainly on the GSY mitigation method. A large-scale physical model (1-g) is used to study the subsidence mechanisms and to estimate the efficacy of GSY for both cohesive and granular overlying soils. The results show that the presence of GSY reduces the ground movement due to the cavity progress toward surface, even under significant overload (traffic, localised foundation, etc.). The deformation of the GSY and the scenario for ground surface movement (subsidence or sinkhole) depend on both the soil type and overload intensity. The experimental results are compared to the analytical solutions proposed to design the GSY for cohesive and granular soils. In particular, the influence of the vertical stress distribution acting on the GSY is investigated. Different geometries of stress distribution are proposed for granular soils as a function of the loading mode (self-weight or localised overload). For cohesive soils, the action of the collapsed soil on the GSY sheet is found to be well estimated by considering the effect of a simplified system composed of two well localised punctual forces. The analytical and experimental results obtained are rather similar, proving the relevance of the analytical models in predicting the behaviour of reinforced soil layers taking into consideration the real stress distribution deduced from the experimental results. |
| Databáze: | OpenAIRE |
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