The Most Impressive 3D-Printed Bridge Projects
In the construction industry, additive manufacturing is being widely used today. Whether it’s to build houses, schools, or even bridges, 3D technology offers great benefits. In terms of structures and walkways of urban architecture, 3D-printed bridge projects have multiplied in recent years. Many countries are now using additive manufacturing to build these connecting structures, in part due to the low cost. To learn more about these sorts of projects and how additive manufacturing facilitates the construction of bridges, we have compiled a list of some of the most preeminent initiatives of recent years, whether they are completed or currently still under construction.
A Walkway Made With 60% Less Material
Although it seems difficult to believe, this project is a reality. Specifically, it was Ghent University that carried out the initiative to create a walkway through additive manufacturing that required less material and had a reduced environmental impact. On the project, Ghent University worked with Vertico and Technion – Israel Institute of Technology to design the pedestrian bridge, which is not very impressive for its size, but it is impressive in terms of aesthetics, and especially striking for being a bridge with optimized topology. For this, they used their concrete 3D printer that offers a printing volume of 4.5 x 2 x 2.5 m, with a material specially designed for this purpose. In this way, the company aims to reduce CO2 emissions and increase productivity in the construction sector.
Photo Credit: Vertico
The Technological University of Eindhoven’s Collaboration
Acclaimed architect Michiel van der Kley, along with Summum Engineering and Witteveen+Bos collaborated with the Technological University of Eindhoven (TU/e) on the design of the 3D model for the longest 3D-printed bridges built for cyclists. The bridge was manufactured in the 3D printing center of Saint-Gobain Weber Beamix, which uses several BAM robotic arms. The 29-meter-long bridge was designed with round and natural shapes to blend in with its outdoor placement.
Acciona 3D-Prints a Bridge in Madrid
We could say that these were the first 3D-printed bridges installed in the world. Located in Alcobendas, in Madrid, the concrete structure was created by the Spanish company Acciona, which works with several business lines, including energy, infrastructure, and for a few years, additive manufacturing. Although Acciona was in charge of the 3D printing process, the concrete pedestrian bridge was designed by the Institute of Advanced Architecture of Catalonia. Regarding the more technical aspects, we can highlight that the bridge is 12 meters long and 1.75 meters wide, which represents a milestone in civil engineering in the Iberian country. In addition, its design has an organic and biomimetic architecture, resembling forms of nature.
Photo Credit: Acciona
The First 3D-Printed Bridge in the Netherlands
In 2017, the Eindhoven University of Technology (TUE) and the company BAM Infra designed the first 3D printed concrete bridge in the Netherlands. Made up of 800 layers of concrete, the 8-meter long and 3.5-meter wide bridge is located over a ditch and thus connects two roads. As in many situations, TUE and BAM Infra claim to have minimized, through 3D printing, the amount of concrete needed to build such a structure. Located in the town of Gemert, the bridge was built in just 3 months.
Photo Credit: Bart Maat / EPA
Shanghai’s Longest Concrete Bridge
An impressive 176 units of cement support the longest 3D-printed concrete bridge in China (originally the World before being overtaken by a project in the Netherlands), allowing pedestrians to cross the Shanghai Canal. The bridge was designed by a team led by Professor Wu Weiguo from Tsinghua University and made using additive manufacturing next to Wisdome Bay. Inspired by the historic Anji Bridge in Zhaozhou (China), the pedestrian structure in Shanghai is intended to be representative of the potential of 3D technology for engineering projects of all kinds. Two robotic arms were used for the construction, creating the concrete arch in 450 hours. The team claims that it was possible to save two-thirds of the implementation costs compared to conventional manufacturing processes.
Photo Credit: JCDA
A 3D-Printed Retractable Bridge
Last summer, China unveiled another bridge designed in part thanks to additive manufacturing, this time with a very special feature. It was designed to retract at any time and is controlled by a simple button connected via Bluetooth. The entire bridge has not been 3D printed, it is simply made up of triangular panels custom made by additive manufacturing in just 3 days. These 36 elements were made with a composite material from recycled materials. The bridge is 9 meters long and 1.5 meters wide and was installed in Wisdom Bay Park.
Marine Corps Combat Testing 3D-Printed Bridges
In 2019, the United States Marine Corps had a training program for special divisions on the field operation of an Automated Construction of Expeditionary Structures (ACES) printer. While the Marine Corps is still experimenting with the use of large concrete and aluminum printer systems, they plan to be able to deploy these types of 3D printers that will allow field engineers to create custom-made bridge structures for crossing any land gap. “The only restraints right now are working out intellectual property deals with industry.”, explained Captain Matthew Friedell, the team leader of the Advanced Manufacturing Operations Cell in the Marine Corps Rapid Sustainment Office. Within the next few years or so, he predicts the additive manufacturing industry and the U.S. Department of Defense will have worked out deals for using proprietary 3D technology.
Securing a 3D-printed bridge support column during an exercise at Camp Pendleton, California. (Photo Credit: Marine Corps.)
A Pedestrian 3D-Printed Bridge in Rotterdam
A collaboration between Royal HaskoningDVC, CEAD and Covestro has resulted in the first lightweight 3D printed pedestrian bridge prototype, which was made using a glass-filled thermoplastic composite material. The companies claim that they chose the material as fiber-reinforced polymer bridges are known for having a longer lifetime expectancy and lower life cycle costs compared to steel. They also note that apparently this is the first time that someone has used 3D printing technology to make a bridge made out of large-scale continuous fiber reinforced thermoplastic parts. For the technology, they used fused granulate fabrication and Arnite AM8527 pellet material from Covestro. They name a number of benefits to the bridge including having a reduce construction time, increased sustainability, reduced maintenance burden and increased lifespan. Currently, the bridge only exists as a prototype, however ultimately it will be installed in Kralingse Bos park in Rotterdam.
Plastic-based 3D-Printed Bridge
In 2018, the Chinese construction company Shanghai Mechanized Construction Group Co (SMCC) and the 3D filament manufacturer Polymaker teamed up to develop an original 3D printed bridge. Created based on plastic and intended for pedestrians, the bridge measures 15.25 meters long, 3.8 meters wide and weighs no less than 5,800 kilos. To achieve this, the two companies said they obviously used an XXL printer, which would have a print volume of 24 meters long by 4 meters wide. Regarding the material used, they claim to use ASA, an acronym for acrylonitrile styrene acrylate, loaded with fiberglass.
Photo Credit: Ti Gong
Plastic-based 3D-Printed Bridge
In 2018, the Chinese construction company Shanghai Mechanized Construction Group Co (SMCC) and the 3D filament manufacturer Polymaker teamed up to develop an original 3D printed bridge for a park. Created with plastic and intended for pedestrians, the bridge measures 15.25 meters long, 3.8 meters wide, and weighs 5,800 kilos. To achieve this, the companies used an XXL printer with a print volume of 24 meters long by 4 meters wide. For the material, the team used acrylonitrile styrene acrylate (ASA) loaded with fiberglass. In 2019, the bridge was successfully installed, and it is expected to last 30 years in the park.
Photo credit: Polymaker
The Diamanti Bridge
AI-generated image of the planned Diamanti Bridge. (Credits: Massive Form).
The Da Vinci Bridge
The newly unveiled Da Vinci Bridge in Bari demonstrates how 3D printing can merge historical vision with sustainable innovation. Built with WASP’s large-scale 3D printer, the structure was produced in 13 interlocking blocks using a mortar made from stone waste and lime, giving new purpose to byproducts of marble and stone processing. Inspired by Leonardo da Vinci’s 16th-century design, the bridge relies on the precision of 3D printed elements to achieve its self-supporting form. This project not only brings da Vinci’s concept to life but also shows how digital fabrication can reduce environmental impact in modern construction.
Photo Credit: WASP
The Phoenix Bridge
We wrap up our list with the Phoenix 3D printed bridge, a structure designed by Swiss cement manufacturer Holcim. The project was developed in collaboration with ETH Zurich, incremental3D, and Zaha Hadid Architects. Built with 10 tons of recycled material, the bridge achieved a 25% reduction in its carbon footprint. Holcim created the custom printing ink, a mix made entirely from recycled concrete. According to the company, additive manufacturing reduced material use by 50% while maintaining the same level of performance.
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