Ground improvement work Deep mixing method "Expanded and Contracted Column Method"
Simultaneous forward and reverse rotation using a double-tube structure of the rod! A new ground improvement method utilizing an expansion and contraction technique.
The "Expansion and Contraction Column Method" is a deep mixing treatment method characterized by its expansion and contraction mechanism and simultaneous rotation mechanism in both directions. By using the expansion and contraction method, it is possible to improve the ground by reducing the diameter of the excavation area and increasing the diameter of the improved area, allowing for the proper use of solidifying materials and a reduction in excavation time, resulting in reliable and economical construction. 【Features】 ■ The amount of excavated soil in the excavation area is less than 1/4 of that of conventional methods. ■ The excavation head and mixing wings can be expanded and contracted. ■ Simultaneous rotation in both directions due to the double pipe structure of the rod. ■ Centralized management system for the expansion and contraction column. ■ Large diameter column with diameters ranging from φ1,200mm to φ2,000mm. ■ Use of general-purpose machinery for the base machine. *For more details, please refer to the catalog or feel free to contact us.
basic information
【Machine Specifications (Partial)】 ■Heavy Machinery: DH-558 (120t class) ■Mixing Shaft: Double Pipe Method (Inner Pipe Rod, Outer Pipe Rod) ■Excavation Mixing Section ・Excavation Head: 3 Wings ・Mixing Wings: 4 Wings ・Expansion and Contraction Mechanism ■Solidification Material Silo ■Solidification Material Plant ■Grout Pump ■Water Tank *For more details, please refer to the catalog or feel free to contact us.
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Applications/Examples of results
【Applications】 ■ Base improvement in excavation for earth retention ■ Foundations for water tanks and buildings ■ Prevention of sliding failure in embankments, etc. ■ Construction of impermeable walls, etc. *For more details, please refer to the catalog or feel free to contact us.
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In the mid-1950s, during a period of construction boom leading up to the Tokyo Olympics, Asou Sangyo Co., Ltd. (now Asou Corporation) focused on the increasing demand for lightweight and labor-saving high-rise buildings. They recognized the advantages of using aerated concrete (air mortar), which excels in lightweight properties and thermal insulation, as insulation material, and established the company with the aim of manufacturing and constructing building-grade aerated concrete. The unique technology developed through research and development of imported technology from the United States, along with the excellent characteristics of their product (aerated concrete), matched the needs of the times. It was used for waterproofing on rooftops to reduce the weight of high-rise buildings, raising floor slabs on each floor, and embedding piping in mechanical rooms. Subsequently, the lightweight properties of aerated concrete attracted attention from various fields, leading to its adoption in numerous civil engineering projects, including the Tōkaidō Shinkansen construction. To date, the construction achievements have exceeded 10 million cubic meters, and the company continues to provide satisfaction to the times and society as a pioneer of air mortar and a technology development-oriented enterprise that responds to various needs.
