[Construction Case] Restoration of Office Building Ground Subsidence Due to the Hanshin-Awaji Earthquake

Restoration of office building subsidence! We will introduce an example of a building with 6 floors above ground and 1 basement level.

In the Great Hanshin-Awaji Earthquake, localized loosening occurred in the foundation of office buildings due to liquefaction and intense vibrations over a wide area of the coastal region, and we restored the areas that had sunk. We entered the underground pit (900mm) from the opening on the first basement floor and drilled holes. Additionally, since the groundwater level is at GL-1.0m, we installed injection pipes while performing water stop injections for the pressurized water. Due to the irregular shape of the building, we measured the uplift both externally and internally to confirm any bulging, and we applied JOG to prevent distortion. 【Case Overview】 ■ Location: 2-chome, Sakaemachi, Chuo Ward, Kobe City ■ Building Name: Office Building ■ Structure and Scale: RC structure, 1 basement floor, 6 above-ground floors ■ Foundation Structure: Slab foundation ■ Total Restoration Weight: Approximately 3,500t *For more details, please refer to the PDF document or feel free to contact us.

Ground improvementRenovation and repair methodsSpecial Construction Method