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On the evening of May 7, the successful pouring of the final batch of concrete marked the smooth closure of the mid-span of the (40+64+40) m continuous girder of the Jintian Zijing River Grand Bridge on the Liuzhou-Wuzhou Railway, which is invested by Guangxi Communications Investment Group and constructed by China Railway Shanghai Engineering Bureau Group.

It is understood that the continuous girder body of the Jintian Zijing River Grand Bridge has a total length of 145.5 meters and is one of the key control projects of Section 4 of the Liuzhou-Wuzhou Railway. The continuous girder is located in Hengya Village, Chalin Village, Jintian Town, Guiping City, and its (40+64+40) m mid-span crosses the Zijing River. This section lies in a mountain valley with developed surface water, concentrated villages, widely distributed farmland, and proximity to a reservoir, making it significantly affected by power generation and flood discharge from the reservoir. The geology consists mostly of soft soil and clastic rock, with many underground karst caves, and the construction conditions are harsh. Construction of the continuous girder in this section is characterized by high requirements for linear control precision, large span, difficult construction organization, high safety risks, harsh geological conditions, and strict environmental protection requirements.

To smoothly achieve the goal of bridge closure, the project department actively planned and coordinated comprehensively. Since the start of construction of the continuous girder, activities such as "labor competitions," "excellent labor teams," and "four-star employee" evaluations have been carried out to fully mobilize the production enthusiasm of all construction staff and enhance their sense of urgency. Before closure, a leading group headed by the project manager was promptly established, and specialized construction technology training for the closure segment of the continuous girder was organized multiple times for relevant technical backbones. Key and difficult points in construction were actively discussed and overcome, the construction plan was determined, and technical disclosure was conducted in advance. Safety production responsibilities were strictly implemented. On the one hand, pouring construction was carried out in strict accordance with specifications and design requirements during construction, the on-site supervision system was strictly implemented, leaders were on duty throughout the process, and safety officers and technicians were arranged for on-site supervision and guidance. On the other hand, to ensure safety throughout the construction process, the project formulated a continuous girder closure plan in advance, not only discussing the closure technology of the continuous girder but also repeatedly conducting special safety inspections against the plan requirements before construction and providing safety disclosure to construction personnel, eliminating the possibility of safety accidents and providing a strong guarantee for the smooth closure of the continuous girder. The development concept of "green development" was consistently implemented. The project attached importance to environmental protection around the construction area and maintained environmental protection without relaxation. By setting up construction waste treatment ponds in the construction area and "light floating object storage boxes" on the girder surface, among other measures, on-site construction sewage disposal and control of waste and floating objects were strengthened, effectively protecting the river environment.

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"To ensure the smooth closure of this (40+64+40) m continuous girder, the project department strictly implemented standardized construction requirements, established an inspection team to carefully inspect each process such as bracket erection, formwork installation, and rebar tying. At the same time, quality, safety, and technical disclosure was conducted in advance before closure, making full preliminary preparations for the closure of the continuous girder. The on-site supervision system was strictly implemented. During concrete pouring, leadership team members led the work, and technicians and safety officers supervised throughout the process, ready to solve problems that might arise during closure at any time, effectively ensuring the smooth closure of the continuous girder," introduced Xiao Yanjun, the project leader at the pouring site.

With the smooth closure of the (40+64+40) m continuous girder of the Jintian Zijing River Grand Bridge in Section 4 of the Liuzhou-Wuzhou Railway project, valuable experience has been provided for subsequent continuous girder closure construction in the project. Next, Section 4 of the Liuzhou-Wuzhou Railway project will continue to maintain the good momentum of striving for excellence and pioneering, making important contributions to accelerating the construction of the Liuzhou-Wuzhou Railway.

It is understood that the Liuzhou-Wuzhou Railway is an important component of the Liuzhou-Guangzhou Railway and an important conventional-speed railway corridor from Southwest China to the Pearl River Delta in the country's Medium- and Long-Term Railway Network Plan. The main line has a total length of 238.167 kilometers and a design speed of 160 kilometers per hour. After the project is completed, it can alleviate the tight carrying capacity of the regional national railway network, shorten transport distances, reduce transport costs, and promote and drive the economic development of areas along the route in Guangxi.