Recently, the right span of the Aojiawan Grand Bridge, a control project of the Jintong Expressway PPP project of Guizhou Expressway Group, was successfully closed.

The Jinrentong Expressway starts at the junction of Bozhou District, Zunyi City and Jinsha County, Bijie City, passes through Renhuai, and ends at Shanping Village, Loushanguan Subdistrict, Tongzi County, connecting seamlessly with the Tongzi-Xinpu Expressway construction project. The project is built to a two-way four-lane expressway standard throughout, with a design speed of 80 km/h, a subgrade width of 25.5 meters, and a total length of approximately 102.39 kilometers. The entire line includes 60 bridges, 26 tunnels, and 14 interchanges, and is an important corridor linking the Central Guizhou Economic Zone with the Chengdu-Chongqing Economic Zone.

The Aojiawan Grand Bridge is located within Huaqiu Town, Tongzi County. It is designed as a two-way four-lane separated left and right alignment, with the right span having a total length of 1,032 meters and a designed deck width of 12.55 meters. The substructure includes 6 pile caps of more than 1,000 cubic meters each, with the largest pile cap reaching 2,053.5 cubic meters, and 14 high piers above 40 meters, with the tallest pier at 138.67 meters. The bridge construction area crosses a river valley, with complex geological structures, strong karst development, and inconvenient supply and transportation of raw materials. The project is characterized by high safety risks, large formwork volumes, and high concrete quantities, making construction relatively difficult.

During construction, the Jinrentong Supervision Office of Guizhou Expressway Group strictly implemented the approval of special construction plans, strengthened process and craft control, strictly controlled quality management of key parts and key construction nodes, strictly implemented the review of special construction technical plans for hazardous major projects and on-site verification of their execution, and strengthened the investigation and governance of safety risk hazards for bridge high piers, continuous rigid frame segments, T-beam erection, and cross-construction, making every effort to ensure the construction quality and safety of the bridge. Due to the tight schedule of the continuous rigid frame, the project adopted self-propelled light diamond form travelers to further improve efficiency and reasonably optimize the process, making the construction processes of each span more closely connected, and completed the right-span continuous rigid frame construction one month ahead of the original node plan.