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对比分析了快慢凝预应力锚杆较普通全长树脂锚杆的优势,从锚杆的轴向作用和横向作用两方面进行力学特性研究,得到快慢凝预应力树脂锚杆轴向和横向的应力分布规律.锚杆的轴向作用有效地改善了围岩的应力状态.锚杆的横向作用体现在两个方面,即充填裂隙和抗滑移剪切,能有效改善围岩的力学性质.最后,探讨了节理岩体中锚杆的受力特征,锚杆存在多个应力峰值点,并对轴力公式进行了修正.
The advantages and disadvantages of quick-setting and prestressed anchor were compared and analyzed. The mechanical properties were studied from the axial and lateral effects of anchor rod. The axial and transverse stress of pre-stressed and pre-stressed resin anchor rods were obtained. The axial distribution of the anchor rod effectively improves the stress state of the surrounding rock.The lateral effect of the anchor rod is manifested in two aspects, that is, filling cracks and anti-slip shear, which can effectively improve the mechanical properties of the surrounding rock. The stress characteristics of rock bolt in jointed rock mass are discussed. There are several stress peak points in rock bolt, and the axial force formula is corrected.