On May 14, the main bridge of the Sihe River Bridge, a through-type tied-arch bridge on the Jining Ring Lake Avenue East Line Project (Taibai Lake New District Section), was successfully closed, marking the completion of the key node project with the highest construction risk and greatest difficulty for the entire bridge. According to the Sihe River plan, its landscape lake surface has a total width of more than 600 meters, with green belts on both banks of about 220 meters, and a total width of about 820 meters, all of which the bridge must span.

The Sihe River Bridge has a total length of 830 meters and a total width of 34.5 meters. It is divided into approach bridges on the north and south banks and a main bridge across the river section. The main bridge is a 30+95+130+95+30=380m through-type steel structure tied-arch bridge. The entire bridge is divided into 315 segments, with a maximum lifting weight of 111 tons for a single segment. A 130t crawler crane cooperates with a 150t cross-pier gantry crane for symmetrical segmental hoisting construction.

The Sihe River Bridge started construction in October 2019 and is expected to be completed in August 2021. According to the design drawings, the superstructure of the main bridge is a self-balancing structural system. Two arch ribs are arranged in the transverse direction, inclined inward by 10 degrees overall. They are divided into three parts: the main-span arch rib, the secondary-span arch rib, and the side-span arch rib, all arranged within the hanger area. The transverse spacing at the arch springing is 25m. The main bridge construction is technically difficult and the process is complex, especially the hoisting of the main arch ribs. The segments are heavy, large in volume, poor in lifting flexibility, and the installation process is extremely cumbersome. Moreover, during construction, the requirements for the docking accuracy, alignment, and elevation control of the main arch segments are extremely high. Facing these difficulties, the project department concentrated its superior forces to tackle key problems. In the process, a total of 2 construction methods, 12 invention patents, and 17 utility model patents were formed, solving a large number of various problems encountered during construction. During construction, an intelligent integrated monitoring system developed in cooperation with Chang'an University was adopted to achieve dynamic synchronous real-time monitoring of the entire hoisting process of steel box girder segments, thereby effectively ensuring the precise matching connection between arch rib segments. At the same time, the integrated system was also equipped with a safety control system to display real-time gantry crane fault warning information on the screen, ensuring real-time monitoring and emergency protection of various safety indicators, forming an overall linked operation, and ensuring construction safety and progress.

After the entire Ring Lake Avenue East Line Project is completed and opened to traffic, it will form a north-south lakeside corridor. Together with the West Dike section, it will form a ring-lake tourist sightseeing avenue, connect with the Jining Sihe River road traffic plan, and link the north-south Jining urban area's Canal Capital Tourist Area, Nanyang and Dushan Tourist Area, Weishan Lake Scenic Tourist Area, and the east-west Yanzhou Xinglong Cultural Park, Zoucheng-Qufu Confucius and Mencius Cultural Holy Land, and Sishui Taoyuan Culture. It will provide strong support for the early formation of Jining's Canal Cultural Belt, the restructuring of Jining's tourism spatial structure, and the enhancement of overall tourism competitiveness. At the same time, it will alleviate the traffic pressure on Provincial Highway 104, provide a more convenient scenic corridor from Jining to Weishan County, and play an important role in tourism and economic and social development along the entire Nansi Lake route. The planned construction is of great significance.