| 基于非线性破坏包络线的三维边坡稳定性分析 |
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| 引用本文： | 蒋景彩,山上拓男,Baker R.基于非线性破坏包络线的三维边坡稳定性分析[J].岩石力学与工程学报,2003,22(6):1017-1023. |
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| 作者姓名： | 蒋景彩 山上拓男 Baker R |
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| 作者单位： | [1]DepartmentofCivilEngineering,TheUniversityofTokushima,Tokushima770-8506Japan [2]DepartmentofGeotechnology,Technion-IsraelInstituteofTechnology,Haifa32000Israel |
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| 摘 要： | The effects of nonlinearity of strength envelopes on 3D slope stability analysis are investigated.A power relation for the nonlinear envelope is employed to derive the 3D factor of safety equations of an extended Spencer method hich satisfies boty force equilibrium and moment equilibrium.Then,a search procedure is presented based on dynamic programming to determine the 3D critical slip surface for a general slope,Linear and nonlinear strength envelopes used for slope stability computations are obtained by fitting curves to the 103 strength data of consolidated-undrained(CU)triaxial compression tests for compacted Israeli clay.Results of a typical 3D problem show that a linear approximation of the nonlinear strength envelope may lead to a significant overestimation of calculated safety factors.
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| 关 键 词： | 岩石力学 非线性 包络线 边坡 稳定性 |
THREE-DIMENSIONAL SLOPE STABILITY ANALYSIS BASED ON NONLINEAR FAILURE ENVELOPE |
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| Jiang Jingcai,Yamagami Takuo,Baker R.THREE-DIMENSIONAL SLOPE STABILITY ANALYSIS BASED ON NONLINEAR FAILURE ENVELOPE[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(6):1017-1023. |
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| Authors: | Jiang Jingcai Yamagami Takuo Baker R |
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| Abstract: | The effects of nonlinearity of strength envelopes on 3D slope stability analysis are investigated. A power relation for the nonlinear envelope is employed to derive the 3D factor of safety equations of an extended Spencer method which satisfies both force equilibrium and moment equilibrium. Then, a search procedure is presented based on dynamic programming to determine the 3D critical slip surface for a general slope. Linear and nonlinear strength envelopes used for slope stability computations are obtained by fitting curves to the 103 strength data of consolidated-undrained (CU) triaxial compression tests for compacted Israeli clay. Results of a typical 3D problem show that a linear approximation of the nonlinear strength envelope may lead to a significant oyerestimation of calculated safety factors. |
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| Keywords: | rock mechanics slope stability 3D analysis critical slip surface nonlinear strength envelope Mohr failure criterion |
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