This project belongs to the technical field of civil engineering machinery design and manufacturing.

The jacking construction method can effectively overcome the limitations of complex geological and special geomorphological conditions as well as the linearity constraints of highways and railways, and realize cross-road construction without or with few supports across deep valleys and uninterrupted traffic. It is a safe, convenient and rapid bridge construction method. Facing the extreme construction requirements such as high pressure, heavy load, large inertia, and complex working environment in the construction of large and complex bridge structures, this project has developed advanced complete sets of equipment for jacking construction of ultra-large complex structures. It has been used in large-tonnage multi-point synchronous jacking construction and ultra-long joint multi-point continuous jacking construction technology. An important breakthrough has been made in the technology of large longitudinal slope, variable curvature, and curve jacking technology has been innovatively proposed to realize the linear adaptability of the jacking construction combined bridge through the linear control state transfer method. Millimeter accuracy control generally leads the technical improvement of large-scale complex bridge jacking construction. This project has achieved the following innovative results:

(1) The walking jacking equipment has longitudinal, horizontal and vertical adjustment functions and the technical characteristics of fully automatic computer control, and can adapt to the jacking construction of bridges with horizontal curve and vertical curve bridge types. According to the principle of self-balanced structure and the vertical load on the bridge pier, the thrust pressure value at each point is adjusted to reduce the horizontal force on the bridge pier.

(2) Multi-point real-time synchronous control technology and line shape control technology based on state transfer method are adopted to detect movement deviations in real time and correct deviations, and adaptively control the line shape of the push-propelled construction composite bridge. The axis and arch bridge span in the completed bridge state reach millimeter level error. Real-time monitoring of the horizontal displacement of the pier avoids concentrated loads on the pier, reduces the risk of bridge construction, and forms a complete monitoring system for the jacking construction process of multi-span composite structures.

(3) The walking pushing equipment adopts a modular design, is universal and scalable, adapts to a variety of bridge construction processes, does not require a large number of special temporary equipment, and saves equipment installation costs. Adopt advanced open real-time network technology, eliminating a lot of wiring and software and hardware debugging. The synchronous balance control technology ensures the uniform and reliable stress on the structure, which can avoid a lot of reinforcement on the main steel structure.

(4) This project has been successfully applied to more than 30 bridge projects. The proposed large longitudinal slope, variable curvature, and curve pushing technology has achieved the curved pushing of 575 meters of steel channel beams for the first time at home and abroad.

The above-mentioned research results applied for 14 invention patents, including 6 invention patents authorized; 2 utility model patents authorized; and more than 30 academic papers published. The technology and equipment proposed in this project solve construction problems in main channels, cross-railways and highways, and can be used for non-channel approach bridges construction, providing reliable guarantee for the quality of major and complex bridge construction and greatly improving construction efficiency, significantly reducing construction costs, and playing a good role in demonstrating the future development of similar bridge construction technologies. The key technologies of this project have reached the international advanced level, and the equipment developed by it is the first at home and abroad and has good industrialization prospects.