Load Transfer Behavior and Failure Mechanism of Bird’s Nest Anchor Cable Anchoring Structure

To research the internal load transfer behavior and failure mechanism of a bird’s nest anchor cable anchoring structure based on pull-out test, bond-slip model is established basis statistical damage theory, distribution formula shear stress at anchorage agent–rock interface deduced. Combined with theoretical analysis, pulling out test particle flow code (PFC) numerical simulation as well axial force its interface, help reveal mechanism. Results show that: (1) The can reflect process structure. (2) agent increases exponentially to peak value then decreases residual strength. repeated every location interface. curve negative exponential depth, maximum occurs end. (3) crack extends from end other finally cuts through whole Rock mass generates radial cracks by split effects nest. mode combination debonding slip rock mass. are basically consistent according laboratory tests tests, PFC2D better reflects behavior, mechanism, under tensile loads.