In order to speed up the construction progress of the whole line, it is proposed to install additional track wells at a soon-to-be-completed grown-up station. To ensure the track-laying construction, some of the precipitation wells are temporarily closed, thus the groundwater level changes, thus causing a change in the calculation conditions of the floatation resistance of the existing station, which may have a negative impact on the station. The results show that, without considering the friction resistance between the main structure of the station and the enclosure structure, theamount of buoyancy near the railway track Wells is largeafter the closure of part of the precipitation Wells, and the influence degree of buoyancy is different in different parts of the station, so the anti-buoyancy measures should be considered separately. Under the condition of the same water level rise, the roof opening range and the maximum buoyancy of the main structure of the station show a nonlinear growth relationship. Therefore, different measures should be taken to suppress the buoyancy of the main structure of the station for the track wells, shield Wells and other special equipment wells with different opening ranges.