December 3, workers at the Tanzhou Tunnel construction site in Sanlongwan were engaged in prefabricating tunnel sections. The 140,000-ton prefabrication project is nearing completion and is expected to be finished by the end of the month.

On December 3, workers are engaged in the prefabrication of immersed tubes at the Tanzhou Tunnel construction site.

At the Tanzhou Tunnel project site, a 60,000-square-meter caisson dry dockis in use. Multiple tower cranesare positioned around the site, where workers secure rebar, assemble forms, and pour concrete over large steel cages holding immersed tube segments.

On December 3, workers are securing rebar at the Tanzhou Tunnel construction site.

The Tanzhou Tunnel, a key provincial and municipal project, is a critical part of the Sanlongwan. The tunnel, with a bi-directional eight-lane immersed tube design, will run beneath the Tanzhou Waterway. Once completed, it will be the largest inland river-immersed tube tunnel in China.

The project’s immersed tube section spans 316 meters. The tubes are being prefabricated using the axis caisson method at a dry dock on the southern bank of the Tanzhou Waterway, with the connecting end on the northern bank. Prefabrication began in June, with 16 tube segments being built in stages. Thirteen segments have been completed, and the remaining three are expected to finish by the end of December.

"Currently, it's the prime construction season, and our team is working hard to accelerate progress," said Zhang Yige, Chief Engineer of the Shunde Lungui Road project team under China Communications Construction Company (CCCC) First Harbor Engineering Company Ltd. "Water-based operations and the northern bank's connection are progressing simultaneously. With a 24-hour shift system, more than 350 workers on the southern bank and over 100 on the northern bank are working to meet the project timeline. We aim to complete the installation of the immersed tubes before next year’s flood season."

On December 3, work is progressing rapidly at the northern bank connection site of the Tanzhou Tunnel project.

On the morning of December 3, the country's first domestic multi-functional combined vessel for inland river immersed tube installations arrived at the Tanzhou Tunnel construction site, ensuring timely tube installation.

"This vessel was specially designed for this projectand is the first of its kind for immersed tube installation," said Chang Qing, Project Production Manager at the Shunde Lungui Road project team. "In the past, large vessels were used for offshore installations, but in the narrow waters of the Tanzhou Waterway, such vessels couldnot access the site. To address thisproblem, CCCC First Harbor Engineering Company Ltd. developed this specialized multi-functional vessel, ensuring efficient, safe, and digitalized construction for the Tanzhou Tunnel."

On the morning of December 3, the first domestic multi-functional combined vessel for inland river immersed tube installation arrives at the Tanzhou Tunnel construction site.

According to the construction plan, the Tanzhou Tunnel is set to open in 2027. Once completed, it will allow drivers to travel over 300 meters through the Tanzhou Waterway, directly connecting Beijiao Town to Chencun Town, enhancing travel convenience and boosting economic development along the corridor.

Reporter | Zoey

Revisor | Eleanor, Lynn

Source | Foshan News and Media Center

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