Prefabricated subway shield segment and detection and installation method thereof

The invention provides a prefabricated subway shield segment and a detection and installation method thereof, and belongs to the technical field of subway shield segments and installation methods thereof. The problems that a traditional shield segment is large in site construction pollution, the grouting speed of the shield segment is low, and the gap filling effect is poor are solved. A first step structure and a second step structure which are matched with each other are arranged at the two ends of the shield segment, first grouting holes are formed in the inner arc face, at least three second grouting holes are formed in the outer arc face, the first grouting holes and the second grouting holes form a communicating pipeline in the shield segment, bolt holes are formed in the two sides and the inner arc face of the shield segment, and bolt holes are formed in the end faces of the first step structure and the second step structure. Shield segments are prefabricated in a factory and then spliced in a staggere