In this study

the anchored rock slope with weak intercalated layers was investigated by using the FLAC3D software. The modified cable element modeling and improved shear stress extraction method were used to analyze the shear between two anchorage interfaces of the anchored rock slope and its evolution law

respectively. The results showed that the shear stress at the mortar-rock interface was much smaller than that at the anchor-mortar interface

while these two shear stresses extended in opposite directions from the neutral point on the anchor rod. In addition

the shear stress distributed unevenly and mutated near the neutral point. With the increase of the seismic response of the slope

the anchorage interface in the unstable rock was first debonded

and then the anchorage interface in the bedrock was also debonded. Meanwhile

the debonding propagated toward the anchor head and the anchor root

respectively

until the pull-out section or the anchorage section was completely debonded and destroyed. We obtained the shear stress

the distribution of shear stress

and the debonding failure process at two anchorage interfaces of the slope under earthquake. The shearing interaction and anchorage failure mechanism at the anchorage interface were revealed and verified by experiments. The research results provide important references for the design and construction of the anchorage slope.