en.Wedoany.com Reported - Recently, the Tianchang Girder Yard of the Ning-Huai Intercity Railway's Pre-station Section 3, constructed by China Railway Construction Bridge Engineering Bureau Group Co., Ltd., successfully completed the prefabrication of 1,043 box girders. The project has now fully transitioned to the girder erection and bridge deck system construction phase. Key progress has been made in the railway bridge engineering within this section.
The total length of the Ning-Huai Intercity Railway's Pre-station Section 3 is 33.881 kilometers. The main construction scope includes the substructure foundation works and the fabrication, transportation, and erection of box girders for two railway bridges: the Provincial Boundary-Tianchang Double-track Super Major Bridge and the Tianchang Elevated Station Multi-track Super Major Bridge. It is also responsible for the ballastless track construction within its jurisdiction. Currently, the overall progress of the entire line has exceeded 80%, all substructure works have been completed, and the project has entered the final stage of girder erection, ballastless track, and station building construction.
The Tianchang Girder Yard is located in Tianchang City, Anhui Province, China, covering an area of approximately 280 mu. It is equipped with 16 girder fabrication pedestals and 96 double-layer girder storage pedestals, with a maximum monthly production capacity of 120 box girders and a maximum storage capacity of 192 box girders. The project team adopted a standardized assembly-line prefabrication layout, zoned staggered peak construction, and efficient template rotation models. They optimized the full-process workflow connection for rebar binding, formwork installation, concrete pouring, and intelligent curing, compressing intervals between processes and improving pedestal turnover efficiency.
During the box girder prefabrication process, the project team introduced multiple advanced tooling techniques, establishing an intelligent construction system covering key processes. In the concrete production phase, the mixing plant monitoring and alarm system enabled real-time monitoring and intelligent early warning throughout the entire process. Prestressing construction utilized techniques such as mechanical strand threading, intelligent tensioning, and grouting. Concrete vibratory mixing technology enhanced the uniformity and compactness of the concrete.
The newly built line of the Ning-Huai Intercity Railway spans a total length of 179 kilometers, with a design speed of 350 kilometers per hour. It serves as a backbone line for the intercity railway network of the urban agglomeration along the Yangtze River in Jiangsu Province, China. Upon completion, the railway will enable direct one-hour travel between Nanjing and Huai'an.
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