Settlement correction work | Repairing settlement and cracks in the cloth foundation without stopping the utility lines!
Subsidance correction work
Construction without stopping city gas or water supply! A technique for safely leveling the settlement and cracks of strip foundations using a steel pipe pile driving method that relies on the weight of the building.
Localized subsidence and cracking in residential shallow foundations can not only cause tilting of the building but also place excessive strain on the plumbing and equipment under the floor, potentially leading to damage incidents. Typical subsidence repairs often involve temporary suspension of utilities and moving to temporary housing, which can impose a significant burden on homeowners. GeoTech's subsidence repair work offers a groundbreaking jack-up plan that can be executed without interrupting essential services such as city gas, water supply, and electricity. While installing flexible joints to prevent pipe breakage and taking careful protective measures, we press and install steel pipe piles into deep hard layers using the weight of the building as a counterforce. We precisely lift the subsided shallow foundation to restore it to a level position within millimeters. At the same time, we inject epoxy resin into the cracks in the foundation concrete to restore strength and waterproofing, and we fill the voids in the subsided ground under the floor with high-density air-entrained mortar (air milk). This allows for construction while living normally, minimizing both the construction period and costs.
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basic information
This construction method uses general structural carbon steel pipes that meet the JIS G3444 STK400 standard (with an outer diameter of 114.3 mm or more and a wall thickness of 4.5 mm or more). While monitoring pipe deformation in real-time, hydraulic jacks are used to press-fit the steel pipe piles, utilizing the weight of the building as a reaction force, ensuring a secure bottom fixation to a hard support layer with a converted N value of 10 or more, confirmed through SWS testing and other methods. High-durability epoxy resin injection material is used for crack areas in the foundation, and self-hardening foam mortar (air milk) is injected to fill voids under the floor and underground. The structure is firmly secured based on structural safety and considerate construction standards.
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This is ideal for sites where you want to repair local subsidence or cracks in the foundation without stopping the water supply or gas in residential houses or apartment buildings. It meets the needs of homeowners who do not want to incur costs for temporary housing or moving. It is widely applicable to renovation and repair work aimed at correcting subsidence in areas where piping flexibility is required, reinforcing foundation structures in narrow sites where large machinery cannot enter, resolving voids in the subfloor, and preventing future uneven subsidence to extend the lifespan of the building.
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![[Construction Case] Slab Foundation House: Settlement Correction Work (Gifu Prefecture)](https://image.www.ipros.com/public/product/image/744/2001214108/IPROS46139666230907082833.png?w=280&h=280)
![[Construction Case] Sugar Factory: Filling Work for the Void Under the Concrete Floor in the Turbine Room](https://image.www.ipros.com/public/product/image/2d6/2001202604/IPROS52242949008893706778.png?w=280&h=280)
