At 1:50 a.m. on May 8th, after nearly one hour of closed construction, the transformation of fengtai station over Beijing-guangzhou railway bridge was completed after a slow anti-clockwise rotation of 33 degrees

It has laid a solid foundation for the reconstruction project of Fengtai station to be opened to traffic within this year.

At 0:50, the railway "construction skylight" opened on time, the site personnel began the construction work, two distributed on both sides of the Beijing-Guangzhou railway ten thousand tons of T-shaped bridge piers, began to be driven by jacks, at the same time counterclockwise rotation. After 49 minutes, the bridge turned 33 degrees and finally closed over the Beijing-Guangzhou railway line. This marks the Fengtai Station reconstruction project key control of the whole line Jingguang Bridge turned successfully. Fengtai project department site responsible person introduced, in addition to facing a higher safety risk, due to the position of the body in the slope change point, the curve radius is small, longitudinal slope, large tonnage of the body, high closure precision, construction is facing multiple tests.

In order to ensure that the rotation process is safe, before the rotation, they accurately weigh the bridge body, calculate the exact position of the counterweight block, to ensure the balance of the force at both ends of the beam body; The main technical parameters and reliable guarantee are provided for the formal implementation of the rotating body through the trial and tracking monitoring in advance. At the same time, the booster system and limit device are set up to prevent the insufficient or overturning of the rotating body. Due to the closure point located above the jingguang railway, they adopt advanced technology for "closure" steel shell, steel shell design for permanent structure, with the girder with concrete pouring, after waiting for twist in place as the template of closure segments, effectively avoid the traditional hanging basket closure process in use, in the process of demolition debris falling, damage of existing equipment, endanger the occurrence of the phenomenon such as railway train operation safety, Minimize the impact on existing lines.

The reconstruction project of Fengtai Station is the first large-scale passenger station in China to adopt the overlapping arrangement of high-speed and general speed passenger yards, among which the Beijing-Guangzhou Bridge is the key control project of the whole line. The bridge has a total length of 4351 meters and crosses the busy trunk line of Beijing-Guangzhou Railway, which is known as "the main artery of north-south railway traffic", with an average of about 114 trains passing by every day. In order to minimize the impact on the train operation, the design adopts the technology of "building before turning". The beam body is constructed by hanging basket cantilever method on both sides of the railway first. After the railway "skylight point" turns, the closure section of 2 meters is re-cast to achieve closure.

In addition, Xinfengtai Railway Station, as an important part of the national "eight vertical and eight horizontal" high-speed railway network planning Beijing-Hong Kong corridor, will also provide a strong guarantee for the construction of the Xiongan New Area, further improve the Beijing-Tianjin-Hebei railway on the track, and effectively boost the coordinated development of the Beijing-Tianjin-Hebei region.Director/Jiang Qingli