Construction method for cast-in-place pile to penetrate through goaf based on SDDC technology

The invention provides a construction method for a cast-in-place pile to penetrate through a goaf based on an SDDC technology, and belongs to the technical field of bridge construction. The construction method comprises the following steps: performing rotary digging to form a hole to a goaf part; filling the hole, wherein the thickness of a filling material exceeds the depth of the goaf; in-hole dynamic compaction is carried out through an SDDC super-strong dynamic compaction method, and a soil blank film of an inclined cone structure is formed in the goaf; secondary drilling and hole forming are carried out to reach the designed elevation of the pile bottom; according to the method, a stable supporting and filling structure is formed through the conical soil tire film, when drilling is conducted again, under the action of the soil tire film, the situation of hole collapse and caving of the goaf is greatly reduced, goaf treatment does not need to be conducted independently, cost is greatly reduced, and the co