Cavern-style 3D-printed Japanese residence promoted as tremor-proof — this bi-level dwelling is the initial structure of its type to receive a seismic compliance certificate

3D printed cave-inspired home in Japan
(Image credit: Onocom)

Work on the initial government-sanctioned double-level 3D printed dwelling is finished in Japan. Understandably, the land of the rising sun has stringent seismic compliance regulations, so this is a big milestone for the 3D Construction Printers (3DCP) business and the housing market.

COBOD, which purports to be the “world leader in 3D construction printing solutions,” stated its 3DCP technology was utilized for this “cave-inspired” structural marvel. The real on-site residential construction and manufacturing tasks were performed by Kizuki Co., Ltd in Kurihara City, Miyagi Prefecture, Japan. Furthermore, the striking aesthetic of this bi-level residence was presumably guided by venture partner Onocom, an architectural solutions firm.

(Image credit: Onocom)

Japan maintains some of the most rigorous earthquake standards globally. Seeing a government-approved two-story 3D printed reinforced concrete house completed here confirms that 3D construction printing is ready for projects that rely on structural precision and consistent quality, also in seismic areas,” commented Henrik Lund-Nielsen, Founder and General Manager of COBOD International. “The collaboration demonstrates how our technology handles complex geometry, varying climate conditions, and strict regulatory standards.”

Truly, this residence was constructed from scratch, depending significantly on one 3DCP. Onocom notes (machine translation) that 3D printed edifices have generally been restricted to minor or one-level designs. The effective construction of a completely earthquake-resistant residence with two floors renders it even more remarkable. ‘Multifunctional wall’ components, “molded in one step to create a three-layer structure that integrates design, structural frame, and facility space,” are reported to significantly lower field-based finishing tasks.

Other touted benefits of the 3DCP process used to build this cave-inspired home in Kurihara City are: the elimination of construction formwork, reduction of cost and CO2 from parts transport, design freedom, stable quality control, the ability to print continuous foundations for strength, and a boost in speed of construction.

Finally, the initiative also validated the resilience of 3DCP to shifting weather and temperature environments. COBOD says that the initial formwork for the house was printed at temperatures below 10 °C (50 °F), requiring heated mixing water to maintain printability. Conversely, the primary building framework was finalized during the summer at a fairly hot 30–35 °C (86–95 °F). Elevated ambient temperatures “shortened bucket life and required careful process control,” yet these obstacles didn’t stall or compromise the 3D printer-led construction process.

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Mark Tyson
News Editor
  • coolitic
    Looks quite ugly from the outside; but I suppose the inside does have a palatable "cave" aesthetic.
    Reply