Settlement correction work | Identifying buried debris causing settlement in investigation gaps! Pressure plate renovation approach
Identify the subsidence of buried waste lurking in the gaps of the survey points! Revitalize the substructure before renovation with pinpoint underground exploration and pressure plate jacking.
When planning large-scale renovations or seismic reinforcement work, debris and buried waste hidden in the gaps of ground survey data can pose a hidden risk of uneven settlement, leading to floor re-tilting or fixture malfunctions after the completion of the construction. No matter how much the upper structure is renewed, if the foundation and the underlying ground's softening are left unaddressed, the building's inherent longevity cannot be achieved. At Geotech, we conduct hand auger drilling and pinpoint underground exploration as part of the ground and foundation diagnosis before starting renovations, visualizing the extent of buried waste and settlement factors as objective numerical data. In the leveling process, we apply a pressure plate jack-up method that does not require extensive demolition work, using small hydraulic jacks to achieve precise horizontal restoration in millimeter increments, leveraging the building's own weight as a reaction force. After lifting, we pressure-inject high-flow air bubble mortar (air milk) into the voids under the floor to equalize the ground pressure, and we encapsulate the damaged cloth foundation structure with high-adhesion epoxy resin to restore structural strength beyond that of new construction. Geotech's settlement correction work menu enhances the overall quality and durability of the renovation.
basic information
This is a ground reinforcement and uneven settlement correction technology for existing detached houses (wooden, lightweight steel, cloth foundation, and flat foundation) before renovation. For underground obstacle exploration, we employ hand auger drilling machines and probing rods for test excavation, and we use high-precision digital laser levels for settlement measurement. In settlement correction, we install structural carbon steel plates (over 12 mm thick and at least 500 mm square) or concrete pressure plates, and perform millimeter-level horizontal correction through synchronized operation of small hydraulic jacks. For foundation reinforcement, we use high-adhesion epoxy resin injection materials, and we apply high-density filling of lightweight bubble mortar (air milk) in the underfloor gaps.
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Applications/Examples of results
It is used for correcting local subsidence of existing houses caused by underground buried waste, as well as for foundation reinforcement and horizontal restoration before renovation and seismic retrofitting work. It is ideal for renovation sites that want to prevent floor re-slope issues and fixture malfunctions after the completion of renovation work, and to enhance the building's original structural strength and seismic performance beyond that of a new construction. It meets the needs of clients who wish to complete structural soundness at the foundation level in a short period while living in the property, without incurring any costs for temporary housing or demolition work. It is widely utilized for differentiating technical proposals by renovation contractors and builders, as well as for proposing GeoTech's subsidence correction work menu.
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