Tohoku Earthquake Investigation in Iwaki City, Fukushima Prefecture - Ground Replacement Method "Columbus+"

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Ground Replacement Method Columbus+

last updated：Apr 10, 2022

ピーエルジー

Official site

The seismic performance was confirmed even for the earthquake of the Great East Japan Earthquake.

【Iiwaki Chubu Izumi Branch】―――――――――――――――――――――― Iiwaki City, Fukushima Prefecture; construction completed in December 2009; two-story steel structure; 399 m² / seismic intensity of 6 weak (main shock, two aftershocks) ――――――――――――――――――――――――――――――――― 【Staff Interview】 It was a strong tremor, but compared to ordinary houses, the shaking seemed to be less severe. The only issue was some wrinkling in the corner wallpaper. 〈Exterior Condition〉 The building was operating without any issues at the time of inspection. There were no cracks in the exterior walls or foundation. There was also no breakage in the glass openings. It was confirmed that there were no problems. 【Surrounding Area Check】 The surrounding roads had cracks, and nearby block walls had collapsed.

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Applications/Examples of results

【Applications】 ○ Different sinking countermeasures ○ Earthquake countermeasures (vibration reduction) ○ Traffic and factory machinery vibration countermeasures ○ Liquefaction countermeasures ○ Difficulties in bringing in large equipment in narrow spaces ○ Inability to drive piles due to underground obstacles ○ Avoiding troubles with buried objects like piles during and after the return of leased land ○ Energy-saving foundation insulation (frost heave prevention effect) ○ Avoiding excavation surveys in designated archaeological areas If you have any difficulties where other methods are hard to apply, please feel free to contact us. 【Track Record】 ○ General residences ○ Commercial facilities ○ Nursery schools and kindergartens ○ Public institutions ○ Medical and welfare facilities ○ Factories and offices ○ Apartment buildings, etc. A total of 4,000 cases nationwide (as of August 2020) For more details, please contact us.