The sliding units in the exhibition hall are precisely positioned

The roof span of the exhibition hall of the Guangzhou Fair Pavilion extension project is 119.5 meters. It is the first large-span roof in China that adopts the sliding construction of prestressed inverted triangle pipe truss. The roof adopts “hydraulic synchronous slip construction technology”, with a hydraulic tractor as the driving equipment, the 119.5-meter span roof steel structure is pushed forward at the speed of 2-10 meters per hour, realizing synchronous slip and precise positioning of steel trusses. It set the record for the longest and furthest slip of the large-span prestressed inverted triangle pipe truss structure in China.

This project is the first in China to adopt a needle roller slipper for sliding construction. Four 60-ton oil cylinders are used to push the 1560-ton slippage unit forward for nearly 400 meters. Faced with the problem of a narrow site and interpenetration of procedures, the project team innovated the installation process and set a rotating tire rack operation platform at an altitude of 26 meters to “create” a high-altitude working surface for steel structure assembly and realize the rapid assembly of sliding units on the high-altitude platform.