Safety risk assessment method for large-diameter water supply pipeline settlement caused by shield tunneling

The invention belongs to the technical field of shield construction, and provides a safety risk assessment method for settlement of an underground large-diameter water supply pipeline caused by shield tunneling, and the method comprises the steps: dividing the settlement safety risk levels of the underground large-diameter water supply pipeline; geological survey is conducted on the underground large-diameter water supply pipeline, and the shield construction soil body loss rate is obtained according to survey parameters; tunneling parameters of the shield penetrating through the underground large-diameter water supply pipeline are designed; performing construction simulation on the shield under-crossing underground large-diameter water supply pipeline, and determining a pipeline predicted settlement value; and according to the predicted settlement value of the pipeline, determining safety risk levels at different positions of the pipeline, and taking corresponding protection measures according to the corresp