Arch bridge abutment tunnel type large-angle inclined pile construction method

The invention discloses an arch bridge abutment tunnel type large-angle inclined pile construction method comprising the following steps: an inclined pile is divided into an upper step and a lower step which are separately excavated by weak blasting, the top half circle and the straight wall are 2-3m in total and are excavated first as the upper step, and the lower step begins to be excavated after the upper step is excavated 3-5m; inclined pile slag is extracted by a reciprocating circulation slag extractor, pile slag of the upper step is transshipped by the slag extractor to the bottom of the lower step and then conveyed from the bottom of the lower step to the outside of a hole, and the hole is cleaned manually; after excavation of each section of each step is completed, breast wall support is completed in time in a mode of breast wall anchoring and shotcreting support through a mortar rock bolt, a steel mesh, an I-shaped steel arch and sprayed concrete; and holing quality detection ...