Recently, the invention patent "Construction Method for Improving the Installation and Positioning Accuracy of Steel Box Girders" applied by the company was authorized by the China National Intellectual Property Administration.

The patented construction method is based on the Qianlidi Extra-large Bridge project on the Tianjin-Shijiazhuang Expressway, primarily involving bridge construction technology. It adopts a staged installation method using steel box girder supports to solve the problem of difficulty in rotating the boom of a crawler crane due to limited lifting space, thereby enhancing safety of the entire lifting process. This method employs a double crawler crane lifting method to hoist the steel box girder onto the supports, and utilizes a six-point measurement method for fine positioning adjustment of the girder. It can effectively improve the efficiency and accuracy of steel box girder installation and positioning, reduce the difficulty in position adjustment process, and ensure stability of the entire lifting process.