Earthquake Disaster Countermeasures, Contaminated Water Treatment and Decontamination Technologies

「The Company developed E3SKY, an expansion seismic damping technology that simultaneously improves the functionality and seismic resistance of existing buildings, and applied it to the expansion and seismic-damping renovation of the main building of its Technical Research Institute in Chofu, Tokyo.」

「The Company developed KaCLASS, a controlled-layer seismic damping structure that substantially reduces the overall shaking of high-rise buildings caused by long-period ground motion associated with major earthquakes, compared with conventional seismic-resistant and seismic-control structures. It was first introduced at Geo Tower Osaka Juso, a high-rise tower residence in Yodogawa-ku, Osaka, developed by Hankyu Hanshin Properties Corporation.」

「In response to increasingly severe and frequent water-related disasters in recent years, the Company developed a system to provide total engineering services supporting corporate BCPs based on assumed water-related disasters, and began providing the service.」

「The Company developed a road bridge deck renewal method using ultra-high-performance fiber-reinforced cementitious composite (UHPFRC). It also developed a high-precision real-time monitoring system using optical fiber and applied it to caisson sinking work.」

「Applying this system makes it possible to perform in parallel the removal of the existing deck, chipping work to remove rust from the top flanges of steel girders, elevation adjustment work and installation of the new deck. Compared with standard construction methods, the deck replacement process can be shortened to approximately one-third. The application of newly developed lightweight deck removal and installation machines also minimizes the area subject to traffic restrictions and ensures a high level of safety for nearby traffic and surrounding facilities.」

「As one measure for utilizing existing piles in building structures, the Company developed a method for reinforcing existing piles using the high-pressure jet grouting method. The method improves a building's seismic performance by injecting solidifying material into the ground around existing piles. Construction can be performed while leaving the superstructure in place, making it possible to carry out the work without disrupting facility users' activities.」

「To construct urban road tunnels and similar structures using the open-cut method, the Company developed the Super Ring construction method. It uses the benefits of precasting to reduce on-site work, while achieving substantial labor savings and shorter construction times at a cost comparable to conventional methods. Although its cost is equivalent to that of conventional cast-in-place concrete box culverts, the method reduces the number of on-site workers by approximately 90% and shortens the structural construction process by approximately 50%. The M-Tron technology, which purifies soil contaminated with heavy metals such as arsenic through on-site magnetic separation, was applied to earth-pressure and slurry shield tunneling work. Continuous purification of arsenic-contaminated excavated soil in slurry form was successfully achieved.」

「Applying this material to the internal filling work made it possible to carry out placement work using existing facilities without creating new placement holes. This enabled the successful removal of approximately 10,000 tonnes of highly contaminated water that had accumulated in a seawater piping trench, while minimizing radiation exposure associated with the work.」