Ground reinforcement work Cross Wing Column Method [Performance Certification Method]
Cross Swing Column Method
High-precision deep mixing method that has obtained GBRC performance certification.
This is a slurry-based mechanical mixing deep mixing treatment method that has obtained the Architectural Technical Performance Certification from the Japan Architecture Comprehensive Testing Institute (GBRC Performance Certification No. 12-17 Revision 1). It achieves extremely stable mixing performance with minimal variation, unaffected by soil type, thanks to a patented, uniquely developed mixing and stirring device. Numerous performance verification tests conducted on sandy soil, clay, and loam have demonstrated a reliable high quality with a coefficient of variation of 25% or less, providing highly reliable construction based on technical guidelines. Additionally, due to the small markup factor for quality control, excessive material usage can be suppressed, and strict quality inspections can be conducted at minimal cost by adopting "Inspection Method A" as a principle.
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basic information
The specifications include a coefficient of variation of 25% (for sandy soil, clayey soil, and loam), equipped with six mixing blades excluding the excavation blade, and the number of blade cuts must strictly adhere to 450 cuts/m or more for sandy and clayey soils, and 550 cuts/m or more for loam. The column diameters are φ400mm and φ1200mm, covering a maximum improvement length of 22m (12m for loamy ground). The amount of solidifying agent is based on mix tests, with a basic requirement of 150 to 300 kg/m³ or more, and the design strength can be set over a wide range of 400 to 1500 kN/m². Additionally, when applied to small-scale buildings that meet certain conditions, a maximum improvement length of 12m is allowed, and under specified mixing amounts and strength standards, exemptions from mix tests and relaxed measures for quality inspection using mold cores are permitted.
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It is suitable for sandy soil, clayey soil, and loam as applicable ground, making it ideal for ground reinforcement measures for a wide variety of structures such as buildings, retaining walls, and various constructions. It is widely adaptable to small-scale buildings that meet all conditions, including mid-rise buildings, transmission towers, various constructions, and those with three or fewer stories above ground, a maximum height of 13 meters, a eave height of 9 meters or less, and a total floor area of 500 m² or less, as well as retaining walls under 3.5 meters in height. Depending on the site conditions, construction machinery (10-ton and 15-ton classes) and plants can be selected from small to large sizes, allowing for flexible construction results that are not affected by narrow sites or adjacent environments. Depending on the ground conditions, it is possible to propose shortening construction periods and reducing costs by supporting at depths shallower than pile foundations.
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