Recently, the Guangzhou Construction Industry Association released the Notice on the Presentation of the 2022 Guangzhou Engineering Construction Science and Technology Award. GMC's 57 technological achievements won the 2022 Guangzhou Engineering Construction Science and Technology Award, accounting for more than half of the total winners of the award. Among them, the "Key Technology for Precise Assembly and Overall Lifting Construction of Fan-shaped Steel Structure Corridor", a technological achievement by GMC's subsidiary Guangzhou Municipal Engineering Machinery Construction Group, won the first prize, 13 technologies won the second prize and 43 technologies won the third prize.

Notably, the achievement that won the first prize carried out technical research through the Knowledge Tower Project of Guangzhou Knowledge City. Located beside Jiulong Avenue, Huangpu District, Guangzhou City and adjacent to Fenghuang Lake, this project integrates social services, government functions and financial offices and is a representative building and regional calling card of the southern starting area of Guangzhou Knowledge City.

 
▲Knowledge Tower Project of Guangzhou Knowledge City
 

In the middle of Building A of the project, there is a fan-shaped steel structure corridor. Located at a height of 68 meters on the top floor with a span of 41 meters and a total weight of about 800 tons, it was installed through the hydraulic integral lifting method. Due to the irregular plane and uneven weight of the fan-shaped steel structure, there are high construction accuracy requirements for assembly, lifting and other links, and elaborate construction planning and accurate construction pre-simulation are needed.

Due to the high height and the large span, the construction of the fan-shaped steel structure was difficult and the technology was complicated. To overcome these difficulties, the project research team has developed a spatial triangular truss lifting platform to solve the lateral instability of the lifting frame caused by eccentric loading and improve the safety and reliability of the lifting. Meanwhile, the project research team has quantified the accumulative elevation errors of the lifting points in the lifting process of the fan-shaped steel structure, proposed the measures for correcting imbalance caused by multiple lifting points and the "ear plate plus lifting jack" multi-point collaborative fine-tuning process, and improved the overall installation accuracy.

This technological achievement has successfully applied traditional hydraulic lifting technology to the construction industry, met the design and construction requirements of modern buildings, and provided an important reference for the implementation of similar projects in the future. It has reached the leading level in China through appraisal and obtained six nationally authorized patents.

Source: Wen Weican, Guangzhou Municipal Engineering Machinery Construction Group

Edited and released by: Lu Chongyou and Long Kun, Party-Masses Work Department of GMC