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裂隙岩质边坡的破坏主要表现为沿主裂隙面的剪切破坏。根据断裂力学原理,推出了边坡裂隙面扩展的方向和安全系数的函数定义式。通过工程实例分析,运用Ⅰ型和Ⅱ型断裂韧度与应力强度因子的比值和边坡水平位移与竖直位移关系曲线的渐进值,利用推出的函数定义式求解出边坡的安全系数,其物理意义明确、操作方便,并通过程序计算可同时获得该岩坡的安全系数和潜在滑移面的位置两个主要方面的内容。
The failure of fractured rock slope is mainly manifested as shear failure along the main fracture surface. According to the principle of fracture mechanics, the definition of function of safety factor and direction of slope crack propagation is introduced. Through the engineering example analysis, using the asymptotic values of the ratio of fracture toughness to stress intensity factor of Type I and Type II and the relationship curve between horizontal displacement and vertical displacement of slope, the safety factor of slope The physical meaning is clear, the operation is convenient, and the two major aspects of the safety factor of the slope and the position of the potential slip surface can be simultaneously obtained through program calculation.