The Phased Construction Settlement Analysis of Beijing Fengtai Station Reconsruction and Expansion Project

During the construction period, it is necessary to ensure that the existing railway transportation line that originally passed through here was not affected. The project of Fengtai station reconstruction was divided into three phases of construction, and construction was carried out in two phases in sequence and post-cast strips were set up at the junction of the phased construction. Due to the station's main structure consisting mainly of cast-in-place concrete frame structures, the presence of post-cast strips has a significant impact on the progress of subsequent construction. Based on the deformation calculation analysis of the superstructure-foundation-soil, a refined modeling of the strata, structure, and construction steps was carried out. The results show that the differential settlement caused by the later construction on both sides of the settlement post pouring belt meets the specifications and design requirements. The settlement post-cast strips were cancelled and created conditions to ensure the construction period. Verified by settlement measurement data, the numerical calculation prediction results are reliable, and this method can be used as a reference for similar projects.