Settlement correction work | Repairing while living in a small space! Steel pipe pile driving and chemical grouting reinforcement work.
Subsidance correction work
Correcting floor inclinations in narrow spaces and near boundaries while living in the area! Advanced ground reinforcement that solidifies the ground with steel pipe pile driving and chemical injection, fundamentally blocking dizziness and discomfort.
In uneven ground where narrow plots are close to property boundaries and mixed with embankments and excavations, localized subsidence can cause houses to tilt, leading to unexplained dizziness, headaches, and autonomic nervous system disorders for the residents. GeoTech's subsidence correction method is an advanced technology that protects both the building and the health of its occupants from the ground up, even in harsh construction environments. During site surveys, the distribution depth of soft layers and the deformation angles of foundations are accurately analyzed through screw weight penetration (SWS) tests and peripheral level measurements. In actual repairs, we utilize a steel pipe pile driving method (underpinning) using small hydraulic jacks and the i-LIFT method, which injects non-dispersive cement-based grout. Even in narrow sites where large machinery cannot enter, we perform millimeter-level horizontal corrections without relocating to temporary housing, while continuing to use essential utilities such as water and gas. After correction, high-density bubble mortar (air milk) is injected into the ground voids, and for foundation cracks, resin injection and carbon fiber sheet application are carried out, providing strong footing stabilization along with high seismic resistance and extended lifespan.
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basic information
This sinking correction technology uses a portable electric hydraulic pump and a multi-stage multi-point hydraulic jack system suitable for construction in narrow spaces. It employs an underpinning method using general structural carbon steel pipes (STK400 or higher, with a pile diameter of 114.3mm or more) that conform to JIS standards for the pressed materials, and the i-LIFT method, which injects a quick-setting cement-based grout material safely into the surrounding environment without allowing it to dissipate into groundwater. Additionally, aramid/carbon fiber sheets and high-adhesion epoxy resin injection materials are provided for reinforcing concrete foundations, and high fluidity air milk (bubble mortar) is applied for filling subsidence voids directly beneath the foundation.
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It is utilized for correction work on uneven settlement of residential buildings in urban areas with narrow gaps between neighboring properties, densely populated areas, and homes close to retaining walls. It is suitable for space-saving construction applications that can be carried out while living on-site, especially in conditions where the transport of large machinery is difficult. It is used for pinpoint repairs of partial settlement and cracks in fabric foundations caused by lateral flow of fill or settlement due to groundwater tightening, as well as for improving living environments to prevent health issues such as dizziness and headaches in residents caused by floor tilting, all through low-vibration and low-noise work. Additionally, it is applicable for liquefaction resettlement prevention measures through high-precision liquid pressure injection in high groundwater areas and deep ground.
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