In Switzerland, the construction of a unique architectural structure was completed – the Tor Alva tower, which the authors of the project compare to an “exquisite multi-layered cake”. This is the world’s tallest building printed with a 3D printer: its height is 30 meters. About this informs ETH.
Tor Alva, or the White Tower, is located in the small alpine village of Moulins, home to just 11 residents. The project was implemented by scientists from ETH Zurich in partnership with the Fundaziun Origen cultural fund to demonstrate the potential of modern 3D printing technologies in construction.
The architectural form of the tower is inspired by the image of an exquisite tiered cake – a symbolic reference to the history of emigration of pastry masters from Graubünden, who once spread their skills throughout Europe. Thirty-two graceful white concrete columns extend across four stories, gradually tapering and branching out before opening out at the top in a tree-like shape, creating a dome-like space.
The project was implemented by architect Michael Hansmeier and ETH professor Benjamin Dillenburger, a specialist in digital technologies in construction. Instead of using traditional formwork, they chose an additive method — an industrial robot applied concrete step by step, layer by layer, forming elements of arbitrary geometry without the need for casting molds. The architectural design is created with the help of complex algorithms that simultaneously form both decorative patterns and load-bearing elements.
It took about five months to build, of which 900 hours were spent on the printing process itself. The tower was made from separate sections, which were then transported to Moulins and mounted on the base of the existing building. Two workers were used in the process: one applied a special cement mixture in layers, the other was responsible for the installation of steel reinforcement.
After the completion of construction, the tower was opened to visitors. Starting from July, theater shows are planned to start on the upper floor. Tor Alva is designed for five years of operation, after which it can be dismantled and moved to another location.
Photo: ethz.ch
