Calculation charts for estimating safety factors of 3D homogeneous slopes

LU Kun-lin; ZHU Da-yong; YANG Yang

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Calculation charts for estimating safety factors of 3D homogeneous slopes

更新时间：2026-06-25

- Calculation charts for estimating safety factors of 3D homogeneous slopes
- Vol. 33, Issue S2, (2012)
- 作者机构：
  
  合肥工业大学土木与水利工程学院,合肥,230009
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU472
- Online First：11 December 2012，
  
  Published：2012
- 稿件说明：
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LU Kun-lin, ZHU Da-yong, YANG Yang. Calculation charts for estimating safety factors of 3D homogeneous slopes[J]. 2012, 33(S2).
DOI：

LU Kun-lin, ZHU Da-yong, YANG Yang. Calculation charts for estimating safety factors of 3D homogeneous slopes[J]. 2012, 33(S2). DOI：

摘要

针对三维极限平衡法计算边坡安全系数存在着分析过程繁琐、较难普及推广等诸多不足，建立了一套实用的三维边坡安全系数计算曲线。假设三维滑面为中间圆柱和两端为部分球面的组合滑面，采用基于滑面正应力修正的极限平衡分析方法，计算36 864个均质边坡，根据计算结果绘制该套曲线。依据该套曲线可以得到，（1）根据已知边坡体的相关指标快速获得三维安全系数，能够得到较二维分析方法更准确、更客观的稳定性评价；（2）根据实际坡体的稳定状况反分析获得滑面土体强度参数，有效地克服二维反分析得到滑面土体强度参数偏高的弊端。研究成果可为均质边坡三维稳定性初步评价提供简单、实用的参考依据。

Abstract

A series of calculated curves for computing the safety factor of 3D soil slopes are presented here

in light of the analysis process of the 3D limit equilibrium solution to the slope stability is too complex to be widely used. The safety factors of 36864 homogeneous slopes were calculated in advance by using the 3D limit equilibrium solution with a simplified 3D slip surface. And a series of calculated curves were obtained based on these calculation results. According to the curves

the safety factor can be quickly obtained

which is more accurate and reasonable than the 2D analysis. And also the soil strength parameters of the slip surface can be got by back analysis

which overcome the disadvantage that the soil strength parameters obtained by 2D analysis are higher than practical values. The study provides a simple and practical method to the 3D slope stability analysis.

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Related Author

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LU Kun-lin

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YANG Yang

LU Kun-lin

Related Institution

State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

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State Key Laboratory of Geomechanics and Geotechnichal Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

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Research Institute of Highway of Ministry of Communications

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