Huang Yan

On October 8, the first steel box girder erection of the Shichuan Interchange ZDAK0+0.0 Bridge was completed in the LHQZ-ZB0-0-0 construction general contracting project of the Lanzhou Qingzhong section of Lianhuo Expressway undertaken by China 17th Metallurgical Corporation.

The LHQZ-ZB30-0 project is located in Lanzhou City, Gansu Province, with a total length of about 0 kilometers, including 0 tunnels, 0 bridges, 0 interchanges, 0 service areas, etc., with a design speed of 0 kilometers per hour. Shichuan interchange ZDAK0+0.0 bridge across Yanshi Highway, the whole bridge has a total of 0 joints, the 0th joint adopts corrugated steel web steel box-concrete composite beam, and the 0th and 0th joints use prestressed concrete cast-in-situ (post-tensioned) continuous box girders. After the completion of the bridge, it will seamlessly connect the G0 Lianhuo Expressway and the Lanzhou North Ring Expressway, alleviate the pressure of Beilongkou interchange traffic flow, and is of great significance for Lanzhou City to improve the "Second Ring and Eighteen Shots" road grid bureau and promote the development of Gaolan Ecological Innovation City.

During the construction process, the project team carried out several rounds of technical scheme discussions in advance, combined with the construction experience of the bridge in the early stage of the bid section, repeatedly deduced the hoisting process, carefully organized around the hoisting operation conditions, station positions, etc., and constantly improved the special plan and emergency plan, effectively overcoming the difficulties such as high hoisting accuracy requirements and difficult safety control, and making every effort to ensure the safety of the operation. (Qi Ying)