Stability analysis of embankment on composite subgrade |
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| Authors: | WU Chun-qiu XIAO Da-ping |
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| Institution: | Institute of Foundation Engineering, China Academy of Building Research, Beijing 100013, China |
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| Abstract: | Based on comparative analyses of slope stability of embankment on composite subgrade by using limit equilibrium method and finite element method, it is revealed that the calculated safety factors by LEM and FEM can be significantly different when the reinforcements in composite subgrade have dominating influence. Embankment stability can be well predicted by strength-reduction method by using plaxis software. It is further investigated that for embankment on composite subgrade the potential failure patterns of reinforcement columns such as bending, rotation and extension, other than direct shearing through reinforcements, made the difference in calculated safety factors by LEM and FEM. Therefore, for embankment stability analysis with interaction between soil and reinforcement in composite subgrade, LEM may overestimate slope stability and its applicability should be checked with caution. |
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| Keywords: | composite subgrade embankment slope stability limit equilibrium method finite element method |
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