The invention relates to the anchor field of geotechnical engineering, in particular to a supporting structure of large deformation rock soil body, in particular to an anchor rod. The invention relates to a cone sleeve friction resistance type large deformation bolt, including outer nut (2), plate (3) and bevel gear friction body (5), (6), the friction sleeve rod (8), which is characterized in that the friction sleeve (6) on the inner wall along the longitudinal direction is provided with a plurality of the friction sleeve groove (62), rod (8) is provided with a friction cone tooth body (5). The beneficial effect of the invention is that the utility model can automatically adapt to the large deformation of the surrounding rock and automatically extend, and meanwhile, the deformation energy of the surrounding rock can be absorbed during the deformation process so as to ensure the supporting effect.
【技术实现步骤摘要】
【技术保护点】
一种锥阻式摩擦套筒大变形锚杆，包括外螺母（２）、垫板（３）、锥齿摩擦体（５）、摩擦套筒（６）、杆体（８），其特征在于：所述摩擦套筒（６）的内壁上沿纵向设有多个套筒摩擦槽（６２），杆体（８）上设有锥齿摩擦体（５）。
【技术特征摘要】
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