Ground reinforcement work | Streamlining the application process with the design-relaxable CWC method.
The Cross Wing Column Method streamlines the administrative procedures for ground reinforcement work. By relaxing design conditions based on GBRC performance certification, it prevents over-design and facilitates smooth applications.
In ground reinforcement work for construction plans, it is crucial to meet the standards of administrative agencies and inspection organizations, ensuring that confirmation applications are processed smoothly to prevent project delays. GeoTech Corporation's Cross-Wing Column Method (CWC Method) is a reliable deep mixing treatment method that has obtained the GBRC performance certification (No. 12-17 Rev. 1) from the Japan Building Disaster Prevention Association. With assured construction quality provided by patented six-blade mixing wings and proven data showing a coefficient of variation of 25% or less, some administrative agencies may apply preferential measures in design conditions, such as improved evaluation of allowable stress and relaxation of improvement length restrictions. This helps avoid unnecessary excessive design, achieving a reduction in the number of piles driven and cost optimization. The method accommodates sandy soil, clay, and loam layers, covering a wide range of specifications from diameters of φ400mm to φ1200mm and strengths of 400 to 1500 kN/m2. For small-scale buildings, the omission of mixing tests and simplified inspections are permitted, making the process extremely smooth. GeoTech strongly supports conformity assessments and structural design. Please feel free to consult us.
basic information
The specifications of the CWC method corresponding to administrative relaxation are applicable to sandy soil, clayey soil, and loam layers. The improved column diameter ranges from φ400mm to φ1200mm, with a design standard strength of 400 to 1500 kN/m² and a maximum improvement length of 22m (12m for loam and 12m for small-scale). Construction is carried out in strict compliance with the specified number of blade cuts (450 to 550 cuts/m or more) based on the GBRC performance certification (No. 12-17, Revision 1). Reliable performance verification data enables the adoption of high allowable stress in structural calculations and facilitates smooth compliance with review processes.
Price information
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Model number/Brand name
Ground reinforcement work
Applications/Examples of results
This construction method is ideal for various building and civil engineering projects that want to ensure a successful application for confirmation to administrative agencies and structural conformity assessments. It is utilized for ground reinforcement in single-family homes, mid-rise apartments, commercial facilities, and also in retaining walls, structures, and tower foundations where design conditions are strictly limited. Structural designers and contractors who wish to take advantage of public performance certifications to enjoy design relaxations, while ensuring compliance with regulations and safety without incurring excessive construction costs, widely choose this method.
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