Fujita Corporation Press Release
Released:26 Apr 2016

Real time 3D visualization of tunnel lining concrete casting process - Application to a tunnel excavation project during reconstruction work after the Great East Japan Earthquake

Fujita Corporation
President: Yoji Okumura

Fujita Corporation, a Daiwa House Group company (Headquarter: Shibuya-ku Tokyo, President: Yoji Okumura) has developed a "Tunnel lining execution control system" which enables real-time 3D visualization of the tunnel lining concrete casting process. We a. e system" which enables real theffic enforcementmber Plate Recognition (ANPR)izen privacy), Web dashboard to view analyticspplied this system to our work on the Enbuchi Tunnel in Soma-city, Fukushima Prefecture (ordered by the Tohoku Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism in Japan). With this system, the tunnel lining concrete casting conditions can be displayed on a monitor by using pressure sensors and level measurement sensors.

By using this system, the casting stages and casting time can be kept to schedule, because the position of the cast concrete can be identified on a monitor. At the same time, the concrete filling conditions can be monitored in detail, because the system can precisely measure the pressure inside the arch center, enabling the realization of perfect concrete filling conditions at the arch center, which prevents the production of voids at the top of the concrete center.

Fujita Corporation has developed several measurement systems for the tunnel lining concrete casting process to increase the quality of concrete structures. This time, by integrating these systems and making the process visual, we have produced an execution control system for concrete lining which allows workers to easily grasp the execution process and conditions.

We will pro-actively apply this system to our future tunneling projects to ensure the high quality of tunnel lining concrete. We will also continue to make efforts to achieve further automated and labor-saved systems.

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Fujita Corporation
Public Relations Office
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