Achieving high support strength and high quality! A construction method that excels in both environmental and cost aspects.
The ef column method is an evolved soil cement column technique that achieves high load-bearing capacity and high quality, while also being excellent in terms of environmental and cost aspects for a new era. In the ef column method, a core steel pipe is adopted at the center of the soil cement column, and a layer of high compressive strength solidifying agent milk is placed around its outer circumference. This three-layer structure not only realizes excellent load-bearing capacity but also prevents corrosion of the core material. Additionally, during dismantling and removal, the core material serves as a guide for the excavation blade, making it possible to remove the improved body more reliably and easily than conventional methods, which is its greatest feature. 【Features】 - Significant improvement in load-bearing capacity due to the adoption of the core steel pipe - Small improvement diameter with high strength - Reduction in cement usage, lowering material costs and environmental impact - Easy removal of soil cement columns *For more details, please contact us or download the catalog.
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【Specifications】 [Improved Type] ○ Improved Diameter D φ300mm, φ400mm ○ Design Standard Strength Fc Standard 600kN/m2 (loam), 1000kN/m2 (clay, sandy soil) *This does not apply if a mixing test is conducted for loam. ○ Solidifier Addition Amount Standard 300kg/m3 *This does not apply if a mixing test is conducted. ○ Water to Solidifier Ratio WC 60-80% *This does not apply if a mixing test is conducted. ○ Coefficient of Variation Vquf Clay 0.25 Sandy Soil 0.25 ○ Number of Blade Cuts Clay 500 times/m or more Sandy Soil 500 times/m or more [Core Material Steel Pipe] ○ Material Small Diameter Steel Pipe made of Checker Plate (referred to as checker pipe) Small Diameter Steel Pipe made of Patterned Steel Plate (referred to as pearled pipe) Single Pipe ○ Material Quality STK400・STK490 (JIS G 3444 General Structural Carbon Steel Pipe) ○ Diameter 48.6mm to 52.0mm ○ Thickness 2.3mm, 3.2mm ● For more details, please contact us or download the catalog.
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Soil Design Office Co., Ltd. develops foundation and ground investigation, design, and various construction methods suitable for individual houses, based on advanced technology and extensive experience while understanding all ground conditions. Through consulting, we are also actively engaged in research and development of investigation, analysis, and countermeasure technologies targeting liquefaction to support the construction of earthquake-resistant homes.