Settlement correction work | Identifying buried debris causing settlement in survey gaps! Jacking up the pressure plate.
Subsidance correction work
Identify localized subsidence of buried waste lurking in the gaps of survey points! Quickly resolve initial issues with pinpoint underground exploration and pressure plate jacking.
Buried waste such as debris and construction waste hidden in the gaps of ground survey data poses a significant risk factor for unexpected localized subsidence after the handover of a house or in the early stages of a new construction. Since these issues cannot be fully captured by representative points in preliminary surveys, cases often arise where rapid inclinations or structural cracks occur in parts of the mat foundation, leading to disputes with homeowners. At Geotech, we conduct hand auger drilling and pinpoint subsurface exploration to accurately visualize the extent of buried waste and the causes of subsidence as objective numerical data. In the repair process, we apply a space-saving jack-up method for pressure plates, synchronously driving small hydraulic jacks using the building's own weight as a reaction force, and performing precise horizontal adjustments in millimeter increments under constant high-precision laser monitoring. After the lift-up is completed, we inject high-flow air bubble mortar into the voids created under the floor to equalize the ground pressure across the surface, while also pressurizing and sealing high-adhesion epoxy resin into the damaged mat foundation structure to restore its structural strength. Geotech's subsidence correction construction menu strongly supports builders in their after-sales service.
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basic information
This is a technology for identifying the causes of localized subsidence in existing houses (wooden, lightweight steel, cloth foundations, and slab foundations) and for high-precision horizontal correction. Ground exploration employs hand auger drilling machines and probing rods for test excavation, while high-precision digital laser levels are used for subsidence measurement. For subsidence correction, structural carbon steel plates with a thickness of 12 mm or more (at least 500 mm square) or concrete pressure plates are installed, and millimeter-level adjustments are made through synchronized operation of small hydraulic jacks. High-adhesion epoxy resin injection materials are used for foundation reinforcement, and lightweight bubble mortar (air milk) is pressure-filled into the gaps under the floor.
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It is utilized for correcting localized subsidence in newly built or recently constructed houses caused by buried waste, as well as for restoring the horizontal alignment of foundation cracks and floor slopes. It is ideal for clarifying the causes of initial defects due to undetected areas in ground survey data and providing objective evidence to clients. It is suitable for quick resolutions to claims of uneven subsidence after handover, as well as for continuing after-sales warranty systems and re-attachment procedures for ground guarantees. It is widely used by house manufacturers and construction companies for quality assurance responses after handover, as well as for proposing geotechnical subsidence correction work menus.
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![[Construction Case] Slab Foundation House: Earthquake-Induced Settlement Repair Work (Miyagi Prefecture)](https://image.www.ipros.com/public/product/image/00c/2001208991/IPROS18350419504750844032.png?w=280&h=280)
