Soft ground improvement measures are possible: Ground replacement method "Columbus+" case study of collective housing.
Ground Replacement Method Columbus+
Powerful against weak ground! Strong against earthquakes, differential settlement, and traffic vibrations, and also excellent for underfloor insulation.
[K Residence] ———————————————————— Koriyama City, Fukushima Prefecture; Construction completed in April 2012; Wooden two-story building; 205 m² / Although shallow improvement methods and costs were listed, the added value was recognized and adopted. —————————————————————————— The ground replacement method "Columbus+" provides a dual effect of countering differential settlement and seismic resistance, making it a method that is strong against earthquakes and liquefaction. It is recommended for ultra-soft ground, pile foundations, friction pile foundations, designated archaeological areas, underground obstacles, periodic land leases, vibration countermeasures, and earthquake measures. By removing the heavy soil beneath the foundation and placing lightweight EPS (expanded polystyrene) "Geoform" in its place, the weight of the building on the soft ground is reduced, helping to suppress settlement. Furthermore, by balancing with the ground, it prevents differential settlement where the building tilts and sinks, ensuring safety even on ultra-soft ground with deep support layers. For more details, please contact us or download the catalog.
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basic information
【Features】 ○ The cushioning material, "Geofoam," "reduces vibrations from traffic and machinery," and "reflects and absorbs seismic tremors," thereby weakening the impact transmitted to the foundation concrete, resulting in a reduction of vibrations felt in the building by half. ○ The weaker the ground, the longer and larger the seismic vibrations will be. ○ In the case of the ground replacement method [Columbus+], as a result of measures against weak ground, a double effect of differential settlement measures and seismic isolation is achieved. ○ The insulation properties of the "Geofoam" installed under the entire foundation reduce heat loss to the underfloor, contributing to CO2 reduction through heat storage heating systems that store heat in the foundation concrete. 【What is Geofoam?】 ○ It is expanded polystyrene (EPS) produced by the bead molding method. ○ EPS was first used in ground applications in 1972 with the development of the "EPS Civil Engineering Method" in Norway. ○ In Japan, it was introduced in 1986, and it has been confirmed to be durable without issues such as corrosion from microorganisms in the soil or damage from termites. ● For more details, please contact us or download the catalog.
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Applications/Examples of results
【Applications】 ○ Different subsidence measures ○ Ground vibration reduction (earthquakes) ○ Traffic and factory vibration measures ○ Liquefaction measures ○ Energy-saving foundation insulation (frost heave prevention effect) ○ Archaeological site measures, etc. 【Achievements】 ○ Commercial facilities ○ Nursery schools and kindergartens ○ Public institutions ○ Medical and welfare facilities ○ Factories and offices ○ Apartment complexes, etc. 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.