Ten years since the Kumamoto earthquake - The "Hybrid Joint LL Type" expansion device adopted for the new Aso Ohashi Bridge, designed to accommodate fault displacement.

クリテック工業本社、大阪営業所、福岡営業所

The main shock of the Kumamoto earthquake that occurred in the early hours of April 16, 2016, caused the Aso Ohashi Bridge to collapse, significantly impacting local transportation. Following recovery efforts, the New Aso Ohashi Bridge was opened in 2021. In the New Aso Ohashi Bridge, structures that can accommodate future fault displacements have been incorporated, such as the use of a steel simple box girder bridge over the fault. Additionally, the expansion joints installed at the bridge's seams are designed to follow fault displacements. Our bridge expansion joint, the "Hybrid Joint LL Type," has been adopted for this New Aso Ohashi Bridge, contributing to the safety and functionality of the bridge while accommodating large displacements. Japan is a country prone to earthquakes, and bridge design requires ensuring safety against Level 1 seismic motion (earthquakes occurring during the service period) and Level 2 seismic motion (maximum class earthquakes). Moving forward, our company will continue to provide technologies that support the safety and security of social infrastructure.

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【Publication Contents】 ○ Tochigi Prefecture Nikko Civil Engineering Office (Maruyama Bridge) ○ Kinki Regional Development Bureau Kinana River National Road Office (Takase River Bridge) ● For more details, please contact us or download the catalog.