Earthquake measures (vibration reduction) Ground replacement method "Columbus+"
Ground Replacement Method Columbus+
Earthquake measures (vibration reduction) have been confirmed effective even during the Great East Japan Earthquake!
【Verification of vibration reduction effectiveness demonstrated in the Better Living Foundation experiment】 【Insulation and frost heave prevention effects demonstrated and evaluated at the Hokkaido Northern Architecture Research Institute】 【Patent construction method】 The ground replacement method "Columbus+" removes heavy soil beneath the foundation and replaces it with lightweight and compression-resistant "Geoform," thereby reducing the weight of buildings on soft ground and suppressing settlement. Furthermore, "Geoform" has the effect of absorbing and mitigating seismic vibrations and shocks. Its effectiveness was confirmed during the Great East Japan Earthquake. ○ Pre-cut Geoform is delivered according to the construction drawings, making installation easy. ○ We guarantee damages to foundations and buildings caused by differential settlement for 10 years, up to a maximum of 50 million yen. ○ A track record of 4,000 projects nationwide, from public properties to private residences (as of August 2020). ○ We are expanding offices and agents nationwide. Local representatives will visit to provide explanations. ○ Estimates are free of charge. ○ For more details, please contact us or download the catalog.
Inquire About This Product
basic information
**Double Effect of Earthquake Mitigation (Damping) and Differential Settlement Measures** During an earthquake, conventional building foundations transmit seismic vibrations directly to the structure. In contrast, the "Geoform" used in the Columbus+ method is made of a foam resin material, consisting of over 98% air, which serves as a cushioning material. This weakens the impact of the earthquake and transmits it to the building's foundation. **Confirmed Damping Effect During the Great East Japan Earthquake** Our headquarters is located in Sukagawa City, Fukushima Prefecture (the headquarters building employs the Columbus+ method). On the day of the earthquake, a tremor of magnitude 6+ occurred. Many buildings in the vicinity of the headquarters collapsed. However, the headquarters and nearby houses that adopted the Columbus+ method did not lose any tiles, and there were no cracks in the exterior walls. Since it is a damping effect, the building does not remain completely still. On that day, items fell over and computers moved within the office, but all employees were unharmed and were able to resume normal operations from the next business day. **Application Scope and Conditions** - Building weight: 6t/m² or less (suitable for wooden to steel structures, approximately 3 to 4 stories of RC) - Must have a flat foundation. - Can accommodate an N value of 0.
Price information
The estimate is free. Please contact us.
Delivery Time
Applications/Examples of results
【Applications】 ○ Measures against differential settlement ○ Earthquake measures (vibration reduction) ○ Measures against traffic and factory machinery vibrations ○ Liquefaction measures ○ Cases where it is difficult to bring in large equipment in narrow spaces ○ Cases where piles cannot be driven due to underground obstacles ○ Cases where one wants to avoid troubles with buried objects such as piles during and after the return of leased land ○ Energy-saving foundation insulation (frost heave prevention effect) ○ Cases where one wants to avoid excavation surveys in designated archaeological areas If you have any difficulties where other methods are hard to apply, please contact us. 【Track Record】 ○ Single-family homes ○ Commercial facilities ○ Nursery schools and kindergartens ○ Public institutions ○ Medical and welfare facilities ○ Factories and offices ○ Multi-family housing, etc. A total of 4,000 projects nationwide (as of August 2020) For more details, please contact us.
catalog（1）
Download All Catalogs
Company information
Our company specializes in the "Ground Replacement Method Columbus+" which is resistant to earthquakes, differential settlement, traffic vibrations, and liquefaction. We have offices and agents across the country, and our representatives will visit you to provide explanations. Estimates are also free, so please feel free to contact us.