Method for reinforcing high and steep rock slope with ultra-long buried depth deterministic sliding surface

The invention discloses a method for reinforcing a high and steep rock slope with an ultra-long burial depth deterministic sliding surface. Comprising an excavated natural slope topographic surface 1A, a reserved natural slope topographic surface 1B, an engineering slope excavation surface 2, a deterministic bottom sliding surface 3A, a deterministic deep-layer trailing edge sliding surface 3B, an anchoring hole, a series of pre-stressed anchor cables and other structures, wherein the distance between the deterministic bottom sliding surface 3A and a free face is larger than 80 m. The method mainly aims at an ultra-long burial depth sliding structural surface (the burial depth in the horizontal and vertical directions is larger than 80 m) existing in a rock slope at present, anchoring holes are formed in rock blocks, consolidation grouting is conducted on the peripheries of the anchoring holes to enhance the bearing capacity of the anchoring holes, and pre-stressed anchor cables are arranged in the anchoring