碎裂结构岩体路堑边坡锚间距的断裂力学探讨

Discussion on the Anchor Space of Disintegrate Structure Rock Mass Cutting Slope by Using Fracture Mechanics

锚索间距是进行边坡锚固设计的关键参数,由于碎裂岩体结构边坡潜在破裂面的形成受其内部主要裂纹的控制,为确定碎裂结构岩体路堑边坡锚固锚索间距,采用断裂力学理论,通过分析裂纹尖端应力场,结合边坡设计的安全性要求,提出了基于断裂力学理论的该类边坡锚间距分析方法,经过实际工程应用,验证了该方法的可靠性。

Anchor rope spacing is the key parameter on the design of slope anchor.Because the formation of potential failure surface in the cataclastic rock slope is under the control of the inner main crack,fracture mechanics theory is introduced in this paper in order to determine the anchor rope spacing of the fractured rock cutting slope.By analyzing the crack tip stress field and concerning with the security requirements of slope design,this paper brings forward the analysis method of this type of anchor spacing based on the fracture mechanics theory,and the reliability of the method is verified through practical engineering application.