摘要
传统的极限平衡法分析加筋土边坡稳定性只能依靠假定的滑裂面,未考虑筋材对滑裂面的影响。文中将边坡临界滑动场数值模拟方法进行推广,建立了基于准粘聚力原理的加筋土边坡临界滑动场计算方法。该法可确定任意形状的临界滑动面及最小安全系数。通过算例比较了加筋土边坡的临界滑动面与无筋边坡滑动面的变化,并探讨了填土的重度、粘聚力、内摩擦角、筋材抗拉强度等因素对加筋土边坡稳定性的影响。证实利用极限平衡法先求无筋边坡滑动面,再加上筋材的抗滑力矩来计算加筋土边坡安全系数的方法是不正确的。
Analysis on reinforced soil slope stability with traditional limit equilibrium method is only relied on assumed sliding surface,not considering the influence of reinforced material on sliding surface.Through numerical simulation of the critical sliding field of slope,this paper establishes calculation method of critical sliding field of reinforced soil slope based on quasi-cohesion theory.This method can determine the critical sliding surface and the minimum safety factor of any shape.Through comparison between critical sliding surface of reinforced soil slope and unreinforced slope,this paper discusses the influence of the weight,cohesion,inner frictional angle and tensile strength of filling soil on reinforced soil slope stability.It is proven improper to calculate the safety factor of reinforced soil slope by unreinforced slope sliding surface using limit equilibrium method plus anti-slide moment of reinforcement.
出处
《路基工程》
2010年第4期140-142,共3页
Subgrade Engineering
关键词
加筋土边坡
准粘聚力原理
临界滑动场
reinforced soil slope
quasi-cohesion theory
critical sliding field
