Subsidence correction method - List of Manufacturers, Suppliers, Companies and Products

Subsidence correction method Product List

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[Construction Case] Filling Work for Void Under Concrete Pavement Slabs of Kanmon Tunnel

[Construction Case] Filling Work for Void Under Concrete Pavement Slabs of Kanmon Tunnel

Fiscal Year 2013 Shimonoseki Area Preservation Work (Kanmon Tunnel Concrete Pavement Slab Void Filling Work)

The Kanmon Tunnel connecting Fukuoka Prefecture and Yamaguchi Prefecture. When large vehicles pass through the toll booth near the tunnel entrance and exit, vibrations were occurring in the nearby residential area. An investigation conducted by FWD revealed the presence of voids believed to be the cause of the vibrations directly beneath the concrete pavement slabs. The Upcon method is a technique that involves injecting rigid polyurethane resin beneath the concrete pavement slabs. The filling and compaction effects of the polyurethane can resolve the loosening and voids in the subgrade that cause vibrations. The Upcon method was adopted with the aim of suppressing slab vibrations by improving the environment of the upper subgrade. 【Site Information】 Fukuoka Prefecture - Yamaguchi Prefecture / Kanmon Tunnel Total construction area: Approximately 200 square meters Construction period: 2 nights

  • Road construction

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[Construction Case] Highway Toll Booth Concrete Pavement Leveling

[Construction Case] Highway Toll Booth Concrete Pavement Leveling

Quickly repair the unevenness of the concrete pavement slabs at the highway toll booth.

A step in the concrete pavement caused by sinking. It affected vehicle movement when passing through the toll booth on the highway. We injected polyurethane resin under the sunken concrete pavement slab and corrected the 30mm step in a short time. 【Site Information】 Ehime Prefecture Total construction area: Approximately 12 square meters Construction period: One night Maximum step height: 30mm Please watch the fast-motion video showing the concrete pavement slab being lifted by the foaming pressure of the polyurethane resin from below.

  • Road construction

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"Concrete slab sinking correction method" contributes to the longevity of social infrastructure.

"Concrete slab sinking correction method" contributes to the longevity of social infrastructure.

Using high-strength urethane resin, we will correct the deformations such as subsidence, steps, flapping, gaps, and cavities that have occurred in the concrete slab, without excavation and within a short construction period.

The Upcon concrete slab settlement correction method (KT-080008-A, NETIS registration period ended in October 2014) quickly resolves issues such as settlement, unevenness, flapping, gaps, and voids that occur in concrete pavement slabs commonly used in highways and other areas, using specially developed high-strength polyurethane resin. It achieves a short construction period by utilizing a highly mobile plant without breaking the existing pavement slabs or requiring excavation work. This minimizes the period of service suspension and has a proven track record as a planned and efficient method for maintaining social infrastructure. This technology is also adopted not only for highways but also for repair work in ports and airport aprons, as well as disaster recovery work. Upcon will exhibit at the "Highway Techno Fair 2023," where cutting-edge technologies supporting highways will be showcased. Date: November 9 (Thursday) and 10 (Friday), 2023, from 10:00 to 17:00 Location: Tokyo Big Sight, West Hall 3 Exhibition Booth No: A-04 On that day, there will also be a demonstration of settlement correction using polyurethane resin. We invite you to take this opportunity to see it. We look forward to your visit.

  • Renovation and repair methods

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[Construction Example] Construction without moving the rack: Warehouse subsidence correction (Fukushima Prefecture)

[Construction Example] Construction without moving the rack: Warehouse subsidence correction (Fukushima Prefecture)

No need to remove heavy racks or machinery! Here is a case where modifications were completed in just 4 days.

We would like to introduce a case of settlement correction implemented at a warehouse in Fukushima Prefecture. Due to the effects of the Great East Japan Earthquake that occurred in 2011, gradual settlement progressed over the years. After a few years, floor sagging and tilting began to occur inside the warehouse, and inclinations also developed in the rack installation areas. This caused issues such as the forklift forks not fitting properly, leading to "longer loading and unloading times," which disrupted operations and caused difficulties. In this project, we adopted the Upcon method, which allows for construction without moving heavy racks in a short construction period. We were able to correct an area of approximately 1,250 m² in just four days (with a maximum settlement of about 78 mm). [Case Overview] - Construction Area: Approximately 1,250 m² - Maximum Settlement: 78 mm - Location: Warehouse in Fukushima Prefecture - Construction Period: 4 days *For more details, please refer to the PDF document or feel free to contact us.

  • Renovation and repair methods
  • Ground foundation construction method
  • Civil Engineering Method

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[Construction Example] Filling voids and correcting unevenness in CO pavement slabs inside highway tunnels.

[Construction Example] Filling voids and correcting unevenness in CO pavement slabs inside highway tunnels.

Filling the voids and correcting the unevenness in the concrete pavement slabs inside the highway tunnel without excavation and within a short construction period.

【Customer Consultation and Issues】 A gap of up to 40mm has developed in the concrete pavement slabs within the highway tunnel, resulting in a height difference of up to 64mm due to fluttering. Patching materials were used to address the height differences, but to eliminate the discrepancies in the concrete pavement slabs, we adopted Upcon's concrete slab settlement correction method. This method allows for height correction within a short construction period without breaking the existing concrete pavement slabs. The gaps are filled with polyurethane resin, which expands on its own to fill the voids completely. The polyurethane resin injected beneath the concrete slabs flows into the crushed stone layer of the subbase, resolving any looseness in the surface layer and using the pressure from its foaming and expansion to lift the concrete pavement slabs and eliminate the height differences. 【Site Information】 Hiroshima Prefecture Total Construction Area: 653 square meters Construction Period: 10 nights

  • Road construction

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Concrete floor slab settlement correction method "Upcon"

Concrete floor slab settlement correction method "Upcon"

No need to remove luggage or machinery! Quickly correct floor subsidence, unevenness, tilting, and gaps without stopping operations.

The "Upcon Method" involves drilling small holes with a diameter of 16mm into existing concrete floors that have experienced subsidence or tilting. While continuously monitoring the level in millimeter increments, polyurethane resin is injected. The resin injected beneath the floor compresses and strengthens the ground with pressure that causes it to expand in a short time. This process raises the concrete back to its original position while improving the bearing capacity of the ground. Additionally, the final strength of the resin develops in about 60 minutes, and even if there are voids beneath the floor, the same method can be used to fill those voids. 【Features】 ■ Construction time is 1/10 of conventional methods (concrete replacement) (based on our company’s comparison) ■ No need to remove goods or machinery ■ Construction without stopping operations ■ High precision and reliable construction by our skilled employees ■ Completely non-fluorinated resin *For more details, please refer to the PDF materials or feel free to contact us.

  • Renovation and repair methods

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