Abstract: In view of the situation that settlement is hard to control and safety risk is high when urban rail transit interval undercrosses buildings, combined with the engineering case of certain large-diameter shield structure interval undercrosses building group, a complete set of construction technologies are summarized, including residue improvement measures, tunneling control parameters, excavation volume control and comprehensive grouting, treatment measures of stratum change and mud cake formation in soil chamber during large-diameter shield structure tunneling, and the mud membrane method adopted by large-diameter shield structure for opening and changing tools in the composite stratum. The set of technologies effectively controls building and ground surface settlements. After numerical simulation analysis of TBM (tunnel boring machine) in undercrossing section, and compared with the monitoring measured result, the feasibility of the above engineering technology measures is verified.