It is understood that the assembled concrete 3D printing bridge led by Professor Guowei Ma, vice president of the Institute and dean of the School of Civil Engineering and Transportation, is the first assembled concrete 3D printing bridge in the world, and it is also the largest concrete 3D printing bridge with the longest span, the longest total length and the largest volume in the world. ?
3D printed version of Zhao Zhouqiao, with a span of 18.04m and a total length of 28.1m. The overall design of the bridge railing caters to the curve of Zhao Zhouqiao Cave. Peach blossom elements are added to the bridge deck and railings, which means that peaches and plums are everywhere. At the same time, 1903, 19 12, 1929, 1952, 1995, 2065438 are embedded in the railing.
In the construction process, according to the Zhao Zhouqiao 1: 2 scale printing and on-site assembly, not only the concrete material is specially prepared, but also the 3D printing cement-based mechanical equipment is independently developed and designed, and the load factors in the conventional design of various bridges are comprehensively considered, so the safety factor is high.
The successful completion of the footbridge is of great significance for promoting the rapid development of key technologies of intelligent buildings and realizing the greening, industrialization and intelligentization of buildings in China.
What's the difference between building a bridge with 3D printing?
Guowei Ma introduced that 3D printing is a traditional architectural model. Assembled concrete 3D printing Zhao Zhouqiao adopts modular printing technology, and directly carries out assembly and construction on site, which endows traditional bridges with modern flavor and fully realizes innovative design, functional materials, virtual construction, modular assembly and intelligent monitoring.
3D printing can freely and flexibly build special-shaped concrete structures and buildings without formwork support. The design scheme is more free and flexible, and the special texture in printing can be used to give the building a special skin. At the same time, it can also be used in the protection of ancient buildings to accurately restore the damaged and lost parts of ancient buildings.
Compared with traditional construction, 3D printing can save about 1/3 of building materials and 2/3 of labor, and the highly automated printing process can greatly improve the construction efficiency. This technology can also improve the construction efficiency, without increasing the cost due to the geometric complexity of the structure, and reduce the pollution to the site environment. In the process of 3D printing of bridges, many sensors are embedded, and 24-hour health monitoring of bridges can find and eliminate problems such as stress in time, ensure safety first, and embody intelligent integration.
There is also a Zhao Zhouqiao in Shanghai. This year, 65438+ 10/2, a 3D printed concrete footbridge was completed in Shanghai Wisdom Bay Science and Technology Park. The footbridge is 26.3 meters long and 3.6 meters wide. The bridge structure draws lessons from the ancient Zhao Zhouqiao structure in China, and adopts a single arch structure to bear the load, with the arch foot spacing of14.4m.. Before the actual printing construction of the bridge, the damage test of the solid bridge with the scale of 1∶4 was carried out, and its strength can meet the load requirements of full pedestrians.
The project was designed and developed by Professor Xu Weiguo from Tsinghua University (School of Architecture)-Zhongnan Land Digital Architecture Research Center, and jointly built with Shanghai Wisdom Bay Investment Management Co., Ltd. Before the birth of this bridge, there were two 3D printed concrete bridges in the world. One in Gemmert, the Netherlands, is 8 meters long and 3.5 meters wide, spanning a canal. The other is in a park in Castilla, Spain, with a total length of12m and a width of1.75m..