On January 18, 2022, the world's first pile-beam integrated bridge erecting machine "Gonggong" was successfully developed in Wuhan. This equipment, developed by China Railway Science and Industry Group and Poly Changchun, will realize the complete assembly construction of bridge construction and promote the major changes in the world bridge construction process.

Xie Jiwei, chief engineer of the Design Institute of China Railway Science and Industry Group, introduced that compared with the traditional technology, the "Gonggong" bridge erection machine has subverted the cast-in-place method of the bridge infrastructure, and solved the situation that offline construction must rely on the construction of access roads or trestle bridges. A complete set of "aerial" operations for drilling holes, piling, beam erection, and assembling of bridge piers is required, without land acquisition and demolition, and without any other hoisting equipment to assist construction. "A single-span bridge used to take 10 days to complete, but now it can be completed in 3 days, which not only improves construction efficiency, saves construction costs, but also protects the ecological environment of the construction area."

"Gonggong" is 92 meters long, has a dead weight of 575 tons, an effective span of 48 meters, and cantilever heavy-duty operation of 16 meters. Apply for 8 national patents. Accurate piling is the key. China Railway Science and Engineering creatively combines the pile driver and the drilling device, sharing a set of pile frames, first leading the holes, drilling deep holes, and then driving the piles firmly into the ground. The special mechanism carried by the equipment can ensure the verticality of the pile, and can adjust the construction position and angle of the pile driver and the drilling rig as needed.

In the era of bridge construction 1.0, it is necessary to drive the pile foundation first, reproduce the pouring piers, and finally use the bridge frame to form the bridge; in the 2.0 era, the pier body can be prefabricated, the pier can be assembled offline with hoisting equipment, and then the bridge can be built into the bridge with bridging equipment; now , a "Gonggong" pile-beam integrated bridge erection machine can complete all the work of bridge construction, and promote bridge construction into the 3.0 era.

"Gonggong" is used for the construction of the reconstruction and expansion project of Shenshan West Expressway. With a total length of 146 kilometers, the project has been renovated and expanded from two-way 4-lane to two-way 8-lane. It is currently the highway reconstruction and expansion project with the largest investment scale and longest mileage in Guangdong Province. Economic development and industrial upgrading in the Bay Area.Editor/Ma Xue