节理裂隙边坡锚注加固抗剪切效应研究

A Study on Shear Resistant Effect of Anchoring and Grouting Treatment of Jointed and Fractured Rock Slope

通过对节理边坡锚注加固力学模型的理论推导,得出锚注加固能够提高节理抗剪强度和抗剪刚度的结论。借助对各种状态节理的模拟剪切试验对比分析,验证了理论推导的结果;经过对节理剪切试验全程曲线的分析,总结阐述了边坡锚注加固的抗剪切效应特性,指出随锚杆与剪切面的夹角不同,节理面抗剪强度的变化规律;锚杆与注浆胶结体抗剪强度的同步发挥程度与锚杆配筋率有关,从而为节理裂隙边坡锚注加固工法的推广,提供了理论和实验依据。

The theory of a mechanical model of anchoring and grouting treatment of jointed and fractured slope is deducted, and some conclusions that anchoring and grouting will reinforce the shear resistant strength and the shear resistant stiffness of the jointed and fractured slope are obtained. Based on the comparative analysis of the shear simulation experiments for different types of joint rock mass, the results of the theory deduction are validated. Through the analysis of the whole procedure curve of the shear experiment of joint rock mass, the characteristics of the shear resistant effect of anchoring and grouting reinforcement of slopes were discussed. The experiments show that the shear strength of joint plane changes with the variation of the angle between the bolt and shear plane. The reinforcement ratio influences whether the bolt and cemented grout can bring their shear strengths into play at the same time. It provides a theoretical and experimental basis for popularization of the anchoring-grouting method for jointed and fractured slope.