CAJ | 학술논문

针对传统的边坡稳定极限平衡方法不能考虑土体抗剪强度指标变异性影响的问题，基于极限状态的概率分析原理，采用 Monte-Carlo 法对均质路堤边坡的稳定性开展了可靠度计算，讨论了稳定安全系数一定的条件下边坡失效概率随土体抗剪强度指标变异水平的变化规律，分析了安全系数与边坡可靠指标的对应关系及其随土体抗剪强度指标变异水平的变化特征。研究表明：边坡可靠度受土体抗剪强度指标变异性影响显著，呈现出随土体抗剪强度指标变异水平提高而急剧减小的趋势；为保证边坡具有相同的可靠性，安全系数的取值应与土体抗剪强度指标的变异性相适应，据此提出了基于可靠指标和土体抗剪强度指标变异水平的安全系数取值原则及其对应的三参数函数关系式。
침대전통적변파은정겁한평형방법불능고필토체항전강도지표변이성영향적문제，기우겁한상태적개솔분석원리，채용 Monte-Carlo 법대균질로제변파적은정성개전료가고도계산，토론료은정안전계수일정적조건하변파실효개솔수토체항전강도지표변이수평적변화규률，분석료안전계수여변파가고지표적대응관계급기수토체항전강도지표변이수평적변화특정。연구표명：변파가고도수토체항전강도지표변이성영향현저，정현출수토체항전강도지표변이수평제고이급극감소적추세；위보증변파구유상동적가고성，안전계수적취치응여토체항전강도지표적변이성상괄응，거차제출료기우가고지표화토체항전강도지표변이수평적안전계수취치원칙급기대응적삼삼수함수관계식。
Traditional limit equilibrium methods of slope stability fails to consider the influence of soil strength indexes variability.Based on probability analysis principle of limit state,Monte-Carlo method is used to calculate the reliability of stability of homogeneous embankment slope.And with constant safety coefficient,changes of slope failure possibility with different levels of soil strength indexes are studied.The corresponding relationship between safety coefficient and reliability index of the slope and changes of safety factor with variation levels of soil strength indexes are analyzed.Results show that:the slope reliability is affected by soil strength indexes variability significantly,indicating sharp decreases with increase of soil strength indexes variation levels;in order to get the slope the identical reliability,safety coefficient should be changed according to soil strength indexes variability.The safety coefficient should be changed according to reliability index and soil strength indexes variation levels and based on which three parameters function is put forward.