斜坡软弱地基路堤填筑全过程稳定性

为正确评价国家重点建设工程渝怀铁路斜坡软弱地基填方工程的稳定性，按照极限平衡法的基本理论，运用Bishop法、Janbu法及Ordinary法等，分析了在斜坡软弱地基上填筑路堤时其稳定性受断面参数，如地层坡度、软弱土层厚度、路堤高度而变化的影响趋势。研究结果表明，随着路堤高度、软弱土层厚度、地层坡度的增加，最小安全系数将减小。在路堤高度与地层坡度增加两种情况下，填土连同软土一起从软土中部滑动失稳过渡到连同软土一起从软土底部失稳，而在软弱土层厚度增加情况下，则结论恰好相反。建议综合考虑滑动面的形状、位置、滑动区域的大小、最小安全系数等因素决定各种工程措施的具体实施，以达到工程安全性和经济性的有机统一。

Stability of subgrade embankment on sloped weak ground

This paper analyses the stability of subgrade embankment during construction and after completion on sloped weak ground using limit equilibrium theory. Cross-sectional factors influencing the stability behavior of embankment, such as the ground slope, the thickness of weak layer and the height of embankment, are also explored. Research results show that the minimum safety factor will decrease when the embankment height, the weak layer thickness and the ground slope increase, and there are two kinds of failure models of subgrade embankment on sloped weak ground. Furthermore, some viewpoints concerning the construction of high fills are proposed as well.3 tabs,8 figs,8 refs.