To break the world record with a span of 29 meters?The latest concrete 3D printed bridge in use in the Netherlands

Guide: Use3D printingTechnology to build bridges is becoming a new trend.
architecture
Square no longer needs template, the shape of the bridge can also be more unique, on a global scale, currently built3D printingMore than ten bridges have been reported, and the length record of bridges is constantly being broken.
On September 10, 2021, the newest one was built in the Netherlands3D printingThe concrete footbridge has a span of 29 meters.Claimed to be the longest in the world3D printingIn terms of size, the concrete bridge is indeed slightly longer than the 28.15 meters of Hebei University of Technology3D printing“Zhaozhou Bridge” and the 26.3-meter bridge in Shanghai Wisdom Bay Science and Technology Park3D printingConcrete pedestrian bridge.

△Netherlands3D printingConcrete bridge with a span of 29 meters

This3D printingThe bridge was managed by Rijkswaterstaat (Dutch Public Works and Water Management Agency) and designer Michiel van der Kley. It is to commemorate the election of Nijmegen in the Netherlands as the Green Capital of Europe in 2018.
The bridge was manufactured in a concrete printing factory by construction companies BAM and Weber Beamix. The city of Nijmegen is a city of bridges, and this special and innovative bridge is a wonderful addition.

3D printingTechnology makes design more free

In April this year, the project party announced the details of the bridge project for the first time and revealed that they plan to break the longest3D printingThe world record of the bridge.
This project uses concrete3D printingTechnology has injected more free forms into bridge design. Because it is not restricted by traditional techniques such as material selection or concrete formwork, it can absorb different strengths in different places when designing bridges, while adding more personalized elements.

The project party first transformed the bridge design into a3D printingAnd then create a parametric model to generate the final design of the bridge. This model brought the original design to a set of structural constraints, segmented it according to the printing specifications established by the University of Eindhoven, and generated an optimized internal geometry for the bridge.

△3D printingConcrete structural components of bridges

3D printingIs sustainable construction technology

The primary goal of this project is to demonstrate the use of concrete3D printingMethods, the benefits in terms of design and sustainable development are not only bridges, but also houses and other buildings.
3D printingBridges are built much faster than bridges built by traditional methods and require less concrete.These factors make concrete3D printingTechnology has become an attractive technology for future construction projects in terms of sustainability and design freedom.
Theo Salet, professor of concrete structure at Eindhoven University, said: “We use less raw materials and can greatly increase the speed of construction. In the future, we hope to make concrete more sustainable and to reuse it.”
The bridge has a total span of 29 meters, which is said to be the longest in the world3D printingThe concrete footbridge will be officially opened on September 8, 2021.
The project party said: “This 3D production technology can save up to 50% of materials because the printer only prints concrete where the structural strength is needed. 3D technology is maturing and is becoming a faster, more sustainable and cheaper way to build pedestrians. An important choice for the bridge”.

△Assembly3D printingConcrete bridge

Other worldwide3D printingbridge

①Shanghai Wisdom Bay3D printingConcrete pedestrian bridge

In January 2019, Tsinghua University (architectureSchool)-Zhongnan Land Digital Building Research Center Professor Xu Weiguo’s team designed and developed, and cooperated with Shanghai Wisdom BayinvestCo-built by Management Co., Ltd.3D printingThe concrete pedestrian bridge was completed in Shanghai Wisdom Bay Science and Technology Park.

The pedestrian bridge has a total length of 26.3 meters and a width of 3.6 meters. The bridge structure borrows from the ancient Chinese Zhaozhou Bridge structure, adopts a single arch structure to bear the load, and the arch toe spacing is 14.4 meters. Before the bridge entered the actual printing construction, a 1:4 scaled-scale solid-material bridge failure test was carried out, and its strength can meet the load requirements of full pedestrians.

Two robotic arms are used for the printing of the overall bridge project3D printingThe system takes 450 hours to print all the concrete components; compared with bridges of the same scale, its cost is only two-thirds of the cost of ordinary bridges; the printing and construction of the main body of the bridge does not use templates and steel bars, which greatly saves Engineering costs.The bridge body of the pedestrian bridge is composed of three parts: the arch structure, the bridge railings, and the bridge deck. The bridge structure consists of 44 pieces of concrete of 0.9*0.9*1.6 meters.3D printingUnit composition, the bridge deck is divided into 68 units for printing, and a total of 64 bridge decks are also made by printing. The printing materials of these components are all composite materials composed of polyethylene fiber concrete added with various additives. After many proportioning tests and printing experiments, it has controllable rheology to meet the printing needs; the new concrete material is resistant to compression The strength reaches 65mpa, and the flexural strength reaches 15mpa.

②Hebei University of Technology3D printing“Zhaozhou Bridge”

In October 2019, prefabricated concrete3D printingZhaozhou Bridge was completed on the Beichen Campus of Hebei University of Technology and officially won the “longest3D printingBridge” Guinness World Records™ title. This is jointly built by the team of Professor Ma Guowei from Hebei University of Technology3D printingThe bridge, with a total length of 28.15 meters and a clear span of 17.94 meters, has attracted attention from inside and outside the industry.

3D printingZhaozhou Bridge is assembled on-site after printing on the original Zhaozhou Bridge 1:2 scale. It is currently the world’s longest span prefabricated concrete3D printingZhaozhou Bridge. From a distance, it has become a beautiful landscape of Hebei University of Technology. From time to time, students or tourists come forward to take pictures. Looking closer, you can see its assembly structure.

Peach blossom elements are added to the bridge deck and railing, which means that the whole world is full of peaches and plums. At the same time, the railings are embedded with the words of 1903, 1912, 1929, 1952, 1995, 2019, etc., implying the development of the school in 116 years.

③
Space gray
3D printingReinforced concrete bridge

July 2019,Space gray3D printingThe team announced that it has completed the true overall3D printingThe concrete arch bridge is 5.5 meters long, 2.1 meters wide and 1.6 meters high. The printing material is ordinary 425 cement, plus aggregate and steel, the total weight is about 10 tons, and the printing time is 32 hours and 59 minutes.

The printing of the main body of the bridge has no difficulty in technical realization for the mature space ash team. At the beginning of the design, the printed bridge was defined as being able to pass people, vehicles, including heavy vehicles, etc. It was designed completely in accordance with the normal use of the bridge. Therefore, when printing, a large number of steel bars need to be arranged, and the pause function in the control program, the breakpoint resuming printing, and the function of adjusting the printing speed at any time can be fully utilized.

④ Zaha Hadid Office3D printingConcrete bridge

(Editor in charge: admin)

To break the world record with a span of 29 meters?The latest concrete 3D printed bridge in use in the Netherlands

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