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厚覆盖层高边坡稳定性是关系到高速公路安全运行的关键问题之一。针对某高速公路厚覆盖层边坡的地质构成特点,采用基于数值分析的强度折减法和极限平衡方法对典型厚覆盖层高边坡的稳定性进行动态分析,研究了不同施工条件下边坡稳定安全系数变化规律。研究表明:厚覆盖层高边坡最危险潜在滑动面以圆弧滑动为主;厚覆盖层高边坡的稳定性存在动态变化特征,建议工程设计和施工中应考虑最不利的情况进行工程决策,以保证高边坡建设的安全性。
The stability of high cover with thick overburden is one of the key issues related to the safe operation of expressway. Aiming at the geological formation characteristics of a thick overburden slope on a highway, the stability analysis of the typical high overburden slope is carried out by using the strength reduction method and the limit equilibrium method based on numerical analysis. The stability and safety of the slope under different construction conditions are studied. Coefficient of variation. The research shows that the most dangerous potential slip surface of the thick overburden high slope is mainly circular arc, and the stability of the high overburden layer is dynamic. It is suggested that the most unfavorable situation should be taken into account in engineering design and construction , In order to ensure the safety of high slope construction.