High-pressure jet grouting pile body pile-forming strength prediction method based on construction site slurry return test

The invention discloses a high-pressure jet grouting pile body pile-forming strength prediction method based on a construction site return slurry test, which comprises the following steps of: carrying out configuration and strength test on different cement mixing amount strength test blocks, and drawing a relation curve of age strength and cement mixing amount; obtaining a return slurry EDTA titration standard curve under different cement mixing amounts through a test; cement soil slurry returning sampling is carried out at a slurry returning opening of the high-pressure jet grouting pile, and the corresponding cement mass m1 in the quantitative cement soil slurry returning sample is determined; carrying out site construction guniting flow Q and slurry return flow monitoring V2; obtaining the density of the cement soil return slurry sample; the mass m2 of the dried cement soil returned slurry sample is obtained; solving the mass M6 of cement in the pile body; the cement mixing amount in the pile body is calcu