Abstract: The super shallow-buried running tunnel between Xianlinhu station and Huashu station of Nanjing subway line 4 passes under the dedicated railway of the Jiangnan Cement Plant, and the requirements for ground deformation control are relatively high. The karst is developed and the lithology is unfavorable at this section, and it causes great risks during construction. Based on the actual geological and construction conditions, an analysis model was established using ABAQUS to study the surface settlement and subgrade deformation caused by tunnel construction under two cases: the subgrade load and intermittent function of the subgrade load are considered and not considered before and after the grouting reinforcement of the soil mass. A comparison was carried out regarding the analysis results and monitoring data. The results show that the numerical analysis results are correct and the construction technology guarantees smooth construction of this project.