文章摘要
徐卫亚,周家文,石崇,郑文棠.极限平衡分析中加固力对岩质边坡稳定性的影响[J].水利学报,2007,38(9):1056-1065
极限平衡分析中加固力对岩质边坡稳定性的影响
Effect of strengthening force on rock slope stability in limit equilibrium analysis
  
DOI：
中文关键词: 岩石力学  边坡稳定性  极限平衡  安全系数  加固力  角度
英文关键词: rock mechanics  slope stability  limit equilibrium  safety factor  strengthening force
基金项目:
作者单位
徐卫亚 河海大学 土木工程学院，江苏 南京 210098 
周家文 河海大学 土木工程学院，江苏 南京 210098 
石崇 河海大学 土木工程学院，江苏 南京 210098 
郑文棠 河海大学 土木工程学院，江苏 南京 210098 
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中文摘要:
      分别对考虑加固力作用边坡稳定性分析的Morgenstern Price法、严格Janbu法和Sarma法，推导了安全系数的计算过程。在不考虑力矩平衡的情况下，分析加固力对条块抗滑力和安全系数的影响，然后在考虑力矩平衡的情况下，分析Morgenstern Price法中加固力对条块安全系数的影响。结果表明，边坡的安全系数随着加固力和内摩擦角的增大而增大。当滑裂面与水平面的夹角小于某一角度时，条块的安全系数随着加固力与水平面的夹角的增大首先呈现先增大的趋势，在达到极大值后呈现减小的趋势。当滑裂面与水平面的夹角大于某一角度时，条块的安全系数随着加固力与水平面的夹角的增大而减小。最后通过一个边坡稳定性分析的简单算例，说明本文理论分析是正确合理。且在同等条件下，加固力作用在边坡下部比作用在上部的效果要好。
英文摘要:
      This paper presents the derivations of safety factors computations with three methods for slope stability analysis methods, i.e., the Morgenstern Price method which considers the effect of the strengthening force, the rigorous Janbu method and the Sarma method. The effect of the strengthening force on the anti slide force and the safety factor of slice is analyzed by neglecting the moment equil ibrium at first. The similar analysis is then carried out by using Morgenstem Price method with consideration of the moment equilibrium. The result shows that, the safety factor of the slope increases with the increase of the strengthening force and the internal friction angle. When the angle αbetween the slide plane and the horizontal plane is smaller than a specific value, with the increase of the angle βbetween the strengthening force and the horizontal plane, the safety factor of slice increases at first and after reaching the maximum, it decreases. When the angle αis larger than a specific value, the safety factor of slice decreases with the increase of β. An analysis of the case example indicates the rationality of the cognition presented. Under similar conditions, it is more effective when the strengthening force is acting at the lower part of the slope than that acting at the upper part.
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