Settlement correction work | SWS investigation reveals tilt! Leveling survey and floor tilt hydraulic correction technology
Subsidance correction work
Visualizing the causes of floor tilt through SWS surveys and leveling! Protecting the health of buildings and asset value with precise lifting using hydraulic jacks and ground reinforcement while living in the property.
Claims regarding defects in residential properties and issues such as differential settlement and floor tilt that arise during inspections not only lower the value of the building but also cause residents to experience autonomic nervous system disorders such as dizziness and tinnitus. GeoTech Co., Ltd. provides settlement analysis based on objective evidence and high-precision settlement correction solutions. In preliminary investigations, we conduct screw weight penetration (SWS) tests and laser measurements around the building's perimeter to quantify soil properties, ground resistance values, and deformation angles, scientifically clarifying the factors contributing to settlement. During the restoration process, we utilize a low-noise, low-vibration hydraulic jack system to perform precise leveling corrections in millimeter increments without putting stress on the building's structure, all under continuous digital monitoring. This allows construction to proceed while residents remain in the property, thoroughly eliminating secondary costs such as temporary housing expenses and moving. After the corrections, we ensure load-bearing capacity through the installation of steel pipe piles and pressure plates, and by injecting air milk and resin into foundation cracks, we achieve lasting structural safety and enhancement of asset value.
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basic information
The applicable construction methods include the steel pipe pile driving method, which involves driving reaction steel pipes to the support layer (JIS G3444 STK400 or higher, pile diameter of 114.3mm or more, wall thickness of 4.5mm or more), and the pressure-resistant slab method using a steel plate reaction slab (500mm x 500mm or more, wall thickness of 12mm or more). Additionally, we offer the i-LIFT method, which injects quick-setting cement-based grout, and the carbon fiber sheet application method for reinforcing existing foundations (Ganko Oyaji method). The investigation equipment includes SWS testing machines, high-precision laser level measuring devices, and three-dimensional tilt sensors. Lightweight bubble mortar (air milk) is used for the lower filling material, and high-adhesion epoxy resin is used for crack repair.
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It will be utilized for after-compensation and defect warranty responses related to differential settlement accidents after the handover of newly built properties, as well as for settlement correction work. It will be introduced for on-site diagnostics where housing manufacturers, contractors, and builders provide evidence for cause clarification to homeowners, and for repair projects related to inspection issues in the purchase and resale of used houses and real estate transactions. Additionally, it will be used for normalizing living environments to improve health issues such as dizziness, headaches, and nausea caused by millimeter-level floor inclinations, and as a general method for foundation raising and reinforcing the strength of the foundation structure to stop ongoing settlement.
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