"In fact, we are just a small supporting role."-Zhuhai Eastern Heavy Industry Co., Ltd.,

"In fact, we are just a small supporting role."

Release time:

2025-03-03

Recently, above Qishi Village in Luwu Town, Lingshan County, Qinzhou City, Guangxi, with the last section of the 99-ton steel box girder precisely embedded into the bridge body, the Qishi Hub Bridge, one of the three core hub projects of the Pinglu Canal, manufactured and installed by Zhuhai Dongfang Heavy Industry Co., Ltd., has successfully completed its closure.

Recently, in Ling Shan County, Qinzhou City, Guangxi

Above Qishi Village, Luwu Town,

With the last section weighing 99 tons

The steel box girder was precisely embedded into the bridge body,

Manufactured and installed by Zhuhai Dongfang Heavy Industry Co., Ltd.

The three core projects of the Pinglu Canal

One of the hub projects—

The Qishi Hub Bridge has successfully completed its closure.

The "Iron Tailor" weaves a super bridge

Project Overview

The Qishi Hub Bridge and the connecting roads on both banks are located within the boundaries of Qishi Village, Luwu Town, Ling Shan County, Qinzhou City, Guangxi Zhuang Autonomous Region. It is a key node project that crosses the Qishi Hub in the Pinglu Canal project, with a total length of 440m. The bridge span arrangement is: 3x30m+(80m+80m+70m+80m)+30m;
The main bridge of the Qishi Hub Bridge adopts a (80+80+70+80) meter fully welded variable height continuous steel box girder structure, with a single box double chamber section top width of 12 meters, bottom width of 7.398 meters, and a beam height that gradually changes from 2.7 meters to 3.5 meters. The top plate has a two-way 2.0% cross slope like a bow gathering strength, and the welded I-beams on both sides cantilever like a roc spreading its wings, forming a streamlined shape that combines aesthetics and functionality.

Facing the challenge of controlling welding deformation of variable cross-section steel box girders, our technical team has reduced the overall bridge line shape error and improved the qualification rate of weld non-destructive testing by real-time monitoring and adjusting welding stress.
The project team adopted "TEKLA modeling + robotic arm welding" technology to complete the prefabrication of the entire bridge steel structure within 60 days, meeting the client's needs.

Green intelligent manufacturing, dual machine platform completed millimeter-level docking

As a national-level green demonstration project, the steel used for the bridge's steel box girder is weather-resistant steel Q355NHD, and the coating system uses epoxy zinc-rich anti-corrosion coating, effectively improving the service life of the steel box girder.
In the complex stepped construction site, the technical team of Zhuhai Dongfang Heavy Industry effectively improved construction efficiency and quality through prefabricated steel supports. Using one 700-ton truck crane and one 800-ton truck crane for dual machine lifting, the 99-ton closure section steel box girder was completed with millimeter-level docking at a height of 41.5 meters.

Connecting rivers and seas, composing a new blueprint

After the closure of the Qishi Hub Bridge, the entire Pinglu Canal will enter the countdown for navigation. This control project on the "golden waterway" will support the two-way passage of 5000-ton vessels. Once the connecting roads on both banks are fully opened, it will achieve a combined transport system of "15 minutes to the highway, 1 hour to the port."
It is expected that by 2026, this super project, which embodies China's intelligent manufacturing, will officially open for navigation. At that time, northbound cargo ships and southbound vehicle fleets will resonate over Qishi Village, witnessing how the Pinglu Canal reshapes the new open blueprint of Southwest China. Zhuhai Dongfang Heavy Industry Co., Ltd. will not fail its mission and will actively participate in national infrastructure construction, contributing its modest strength to the development of national infrastructure.

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