Buried Cultural Property Preservation Measures - Ground Replacement Method "Columbus+"
Ground Replacement Method Columbus+
If you wish to avoid excavation surveys for buried cultural property sites, please consult us.
【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 Comprehensive 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," reducing the weight of buildings on soft ground and mitigating settlement. Additionally, compared to other ground improvement methods, the depth of the improved ground may be "shallower." Utilizing this feature, if you inform us of the excavation depth that can avoid archaeological surveys in buried cultural property areas when requesting a quote, we will consider conducting ground improvement within that range as much as possible. ○ Pre-cut Geoform will be delivered according to the construction drawings, making installation easy. ○ We guarantee protection against damage to foundations and buildings due to differential settlement for 10 years, up to a maximum of 50 million yen. ○ A track record of 4,000 projects nationwide, from public works to private residences (as of August 2020). ○ We are expanding offices and agents nationwide. A local representative will visit to provide an explanation. ○ Quotes are free of charge.
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basic information
What is the measure for sites containing buried cultural properties? A "site containing buried cultural properties" refers to land where the existence of buried cultural properties is known. There are approximately 460,000 such sites nationwide, and around 9,000 excavation surveys for cultural property protection are conducted each year. For example, in Kamakura City, if construction work involves excavation depths of 60 cm or more in a site containing buried cultural properties, a trial excavation will be conducted for verification. If buried cultural properties are discovered, a full investigation will take place, significantly delaying the planned construction. The Columbus method aims to keep excavation depths below 60 cm as much as possible to avoid trial excavations and full investigations. (Depending on the results of ground surveys, we may not be able to meet expectations.) The Columbus method is a construction technique that is gentle on buried cultural properties. The Columbus method involves removing heavy soil beneath the foundation and replacing it with lightweight and strong "Geoform," thereby reducing the weight of the building. As a result, even if there are unnoticed buried cultural properties beneath the building, the impact is less compared to other ground improvement methods. Scope and conditions for application: - Building weight: 6t/m² or less (suitable for wooden, steel frame, and RC structures up to 3 or 4 stories) - Must have a flat foundation. - Can accommodate an N value of 0.
Price information
The estimate is free. Please contact us.
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Applications/Examples of results
【Applications】 ○ Different sinking countermeasures ○ Earthquake countermeasures (vibration reduction) ○ Traffic and factory machinery vibration countermeasures ○ Liquefaction countermeasures ○ When it is difficult to bring in large equipment in narrow spaces ○ When piles cannot be driven due to underground obstacles ○ When wanting to avoid troubles with buried objects such as piles at the time of return or after return in a leasehold ○ Energy-saving foundation insulation (frost heave prevention effect) ○ When wanting 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】 ○ General residences ○ Commercial facilities ○ Nursery schools and kindergartens ○ Public institutions ○ Medical and welfare facilities ○ Factories and offices ○ Multi-family housing, etc. A total of 4,000 cases nationwide (as of August 2020) For more details, please contact us.
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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.