"Fuqiang" rolls off the production line

Following the successful rollout of China's first ultra-small turning radius composite earth pressure balance shield machine, "Dilong No. 4," Jiangdu once again brought good news of a "major national heavy equipment" on September 6. On that day, the world's largest-diameter rock pipe jacking machine, "Fuqiang," successfully rolled off the production line at Guanghong Heavy Industry in Jiangdu High-tech Zone.

September 7— The reporter saw the successfully rolled-off "Fuqiang" in the production workshop of Jiangsu Guanghong Heavy Industry Equipment Co., Ltd. The entire machine resembles an "underground dragon," employing an ultra-large-diameter main central shaft transmission structure, fully intelligent centralized control, powerful driving, and stable sealing performance. "Its excavation diameter reaches 5.49 meters, setting the current world record for the largest diameter of a rock pipe jacking machine," said a person in charge at Guanghong Heavy Industry. "The main unit of 'Fuqiang' weighs 190 tons and can operate in complex rock composite strata, with a designed maximum jacking speed of 100 millimeters per minute."

"After rolling off the production line, the equipment will be used for the main box culvert pipe jacking construction of the green development project in the Huxingshan area of Hengyang, Hunan, with a single jacking distance of 330 meters," the person in charge said. Unlike traditional shield machines, the rock pipe jacking machine is like a "steel pangolin," capable of traversing complex strata such as silty clay and strongly weathered silty mudstone, thus placing very high demands on equipment and construction. "The company's R&D team overcame difficulties and innovatively adopted advanced technologies, successfully developing and delivering 'Fuqiang' in a short period of time."

Guanghong Heavy Industry has been quietly working away in its field of business. Through continuous technological innovation, it now holds more than 100 product patents and has been recognized as a National High-tech Enterprise and a Jiangsu Province "Specialized, Refined, Distinctive, and Innovative" (SRDI) enterprise. At the same time, the company is also a core base for national trenchless equipment R&D and manufacturing. Its related products have been successfully applied in complex geological engineering projects such as the underground vehicular passage from Luxiang Road to Qilianshan Road in Shanghai, the tunnel under the Beijing-Hangzhou Grand Canal connecting Xutao Road and Hengshan Road in Suzhou, the 4-meter-diameter ultra-long sewage pipe jacking at Tangxun Lake in Wuhan, the metro passage at Guangzhou Baiyun Airport, and the underground comprehensive utility tunnel in Huanggang urban area.