Publicação
Computation of the safety factors of geotechnical structures
| Resumo: | The paper discusses the methods for the calculation of the factor of safety, Fs, of a nonhomogenious loaded soil (and/or rock) mass in relation to Limit Equilibrium (EQU) and refers to the senior author’s own computer programs to solve these problems involved in Engineering Design Practice. To complement general programs for the traditional slices methods, new methods are presented and programmed: The “Rigid Blocks Methods” (RBM) for 2D and 3D situations. RBM are based on the creation of self-equilibrating structural systems inside the sliding ground mass. This generalization allows the treatment of problems such as the stability of excavations for tunnels in addition to the stability of slopes. A number of examples are presented using the authors PC MATLAB programs based on the generalized method of slices and on the new RBM Methods. Comparisons of results with published Fs obtained by other authors and those obtained by FEM are provided. The Rigid Blocks Method gave values for Fs close to published values. However, many more tests and comparisons are needed. Also, the 3D Rigid Blocks Method is promising, mainly for 3D situations such as the stability of the front face in tunnels excavations. |
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| Autores principais: | Machado, Gaspar J. |
| Outros Autores: | Costa, Diana; Silva, João; Ribeiro, Hélder; Martins, Júlio Barreiros |
| Assunto: | Safety factor Earth masses Limite equilibrium |
| Ano: | 2011 |
| País: | Portugal |
| Tipo de documento: | comunicação em conferência |
| Tipo de acesso: | acesso restrito |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | The paper discusses the methods for the calculation of the factor of safety, Fs, of a nonhomogenious loaded soil (and/or rock) mass in relation to Limit Equilibrium (EQU) and refers to the senior author’s own computer programs to solve these problems involved in Engineering Design Practice. To complement general programs for the traditional slices methods, new methods are presented and programmed: The “Rigid Blocks Methods” (RBM) for 2D and 3D situations. RBM are based on the creation of self-equilibrating structural systems inside the sliding ground mass. This generalization allows the treatment of problems such as the stability of excavations for tunnels in addition to the stability of slopes. A number of examples are presented using the authors PC MATLAB programs based on the generalized method of slices and on the new RBM Methods. Comparisons of results with published Fs obtained by other authors and those obtained by FEM are provided. The Rigid Blocks Method gave values for Fs close to published values. However, many more tests and comparisons are needed. Also, the 3D Rigid Blocks Method is promising, mainly for 3D situations such as the stability of the front face in tunnels excavations. |
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