CALCULATION OF THE «BASE - EMBANKMENT» SYSTEM STABILITY
| Autor: | O. A Bogomolova, A. V Zhidelev |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Construction and Geotechnics. 12:19-36 |
| ISSN: | 2687-0908 2687-0894 |
| DOI: | 10.15593/2224-9826/2021.4.02 |
| Popis: | The article describes a method of calculating the stability of fill slopes, including the construction of the most probable sliding surface and the determination of plastic deformations areas with elastic and elastoplastic (mixed task) distribution of stresses in the soil massif. The comparative stability calculations results of the "embankment - weak foundation" systems are presented, the data for which were taken from scientific articles published by other authors. According to these calculation results, the stress and displacement fields arising in the "embankment - weak base" system, the position and shape of the areas of plastic deformations constructed both on the basis of the Coulomb - Mohr strength condition and on the basis of solving a mixed problem of the theory of elasticity and the theory of plasticity of soils the article has comparison of numerical values of the stability coefficients and the safety coefficients of a weak. It is established that the replacement of the soil mass of the embankment with an equivalent load, as is often done in engineering calculations, significantly transforms the stress and displacement fields in the soil mass of the base, the position and shape of the areas of plastic deformation and, ultimately, entails obtaining unreliable results. The article shows the results of calculations performed using the FEA computer program developed by one of the authors and the Plaxis software package are in satisfactory agreement: the stress and displacement isofields practically coincide, plastic areas have similar dimensions, shape and position in the soil mass, which allows us to recommend the FEA computer program for practical use in calculating the stability of slopes and slopes, as well as the "embankment - weak foundation" system. |
| Databáze: | OpenAIRE |
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