“Skylight,” they called it. That’s the term for the brief window when the Fengxi Upper Line of the Beijing-Guangzhou Railway shut down. Today, we stand before the impressive \u4e30\u53f0\u6865.
\u4e30\u53f0\u6865 is more than just steel and concrete. It represents a crucial feat of engineering. It was built during the reconstruction of the Fengtai Railway Station. The station is in Fengtai District, a southwestern area of Beijing known for its blend of modern life and historical importance.
Let’s step back to May 7, 2021. It was early morning when the first steel beam was lifted into place. This was for the Jingguang Bridge, a key part of the Fengtai Railway Station project. This moment was critical because it spanned the busy Jingguang Railway. Its successful completion paved the way for the station’s scheduled opening at the end of 2021.
Imagine the scene. More than 80 workers and managers were ready. They had been waiting for hours. As soon as the “skylight” opened, they sprang into action. Each person knew their job. They worked together with precision. They only had 100 minutes to lift, rotate, move, and secure the beam.
The project used a special design for piers 49 to 52 of the Jingguang Great Bridge. This design featured a steel box girder structure with portal piers. This was essential for ensuring traffic safety. During construction, two steel beams and three steel box girders needed to be erected. These had been prefabricated off-site.
The first steel beam was massive. It measured 28 meters long, 3.28 meters wide, and 3 meters high. The beam weighed about 139.4 tons. With accessories and lifting tools, the final lifting weight reached approximately 161 tons.
To handle such a load, the project team used an 800-ton crawler crane. Experts checked everything carefully. They verified the foundation’s bearing capacity, the crane’s load performance, and the strength of the wire rope clamp ring. They did repeated calculations. They wanted to be absolutely sure the hoisting operation would be safe.
The project manager emphasized safety above all else. They developed a detailed construction plan. The team optimized the operation process. Before the actual lift, they practiced the operation many times.
At 1:25 a.m., the steel beam was perfectly placed. The error was within the design requirements. Workers then welded and reinforced the beam.
This successful first lift was a major achievement. It provided valuable experience for lifting the remaining four beams. Over the next half-month, the team used five more “skylights”. This allowed them to lift and cast the remaining beam plates. Overcoming this high-risk “jam neck” was crucial for the project’s success.
Today, \u4e30\u53f0\u6865 stands as a testament to engineering skill and careful planning. It embodies Fengtai District’s spirit. It blends railway history with modern innovation. As you look at \u4e30\u53f0\u6865, remember the dedication and precision that made it possible.