水平条分法在贴坡高填方路堤稳定性分析中的应用

结合山区高速公路建设的实践,采用足尺模型试验,得出荷载作用下斜坡地基上高填方路堤滑动破坏面出现的位置及形态,并测定了其相应的极限承载力。通过对层状边坡稳定性计算方法的研究,提出了斜坡地基上高填方破坏面为折线时的极限平衡水平条分法,并推导了计算其安全系数和极限承载力的理论公式。结果表明:利用极限平衡水平条分法分析斜坡地基上高填方路堤稳定性不仅简单可行,且具有较高的可靠性和计算精度。

Application of Horizontal Slice Method in Stability Analysis of High Fill Embankments at Slope

Combined with practice in the freeway construction of the mountain region,full scale model test was carried out.The shape and location of the slip curve surface,the ultimate bearing capacity under load were found out when the high fill embankment on slope foundation was under unstable condition. Through studying the stability computation method of layered slope,horizontal slice of limited equilibrium method regarded high fill failure surface as broken line was put forward.The theoretical formulae for calculating safety coefficients and limited bearing capacity were derived.The results show that limited horizontal slice method which is used to analyze stability of high fill embankment at slope foundation is feasible,simple and accurate in calculation.