English：

In view of the safety problems of structural settlement and cracking caused by tunnelconstruction in miscellaneous fill environments, the dynamic response and settlement control effect ofbuilding structures under construction disturbance are studied by taking a tunnel that underpasses existingbuildings as the engineering background. A three⁃dimensional finite element model was established byMIDAS GTS NX. It is found that the surface and vault settlement caused by tunnel excavation show thespatial and temporal evolution characteristics of slow growth⁃rapid development⁃gradual stabilization, andthe law that the vault settlement is greater than the surface settlement is analyzed. Combined with on⁃sitemonitoring and numerical simulation results, it is clear that the key technologies, such as advanced smallpipe grouting reinforcement, short footage excavation, and strong support, can effectively control thevault settlement within 7. 4mm, ensuring construction safety and building stability. The research resultsreveal the deformation law of strata and building structure caused by tunnel construction and verify theeffectiveness of comprehensive control measures.