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[Construction Case] Slab Foundation House: Void Filling Work (Tokyo)

[Construction Case] Slab Foundation House: Void Filling Work (Tokyo)

A gap or cavity of approximately 200mm at most occurred! A case where it was resolved in one day using the up-con method.

We would like to introduce a case of "void filling work" conducted on a slab foundation house located in Tokyo. Due to ground subsidence, the ground level has lowered, resulting in the formation of voids beneath the slab foundation of the house. The voids were resolved in a single day of construction. 【Case Overview】 ■ Maximum void: Approximately 200mm ■ Area: Tokyo ■ Construction period: 1 day *For more details, please refer to the PDF document or feel free to contact us.

  • Renovation and repair methods
  • Ground foundation construction method
  • Special Construction Method

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Urethane Hollow Filling Method "NTR Method"

Urethane Hollow Filling Method "NTR Method"

A product lineup that can be selected according to conditions, ranging from 10 times expansion to 40 times expansion.

High-expansion polyurethane injection material [NTR Foam] is a product developed for filling cavities behind tunnel walls. Due to its high expansion, it can fill cavities with a small amount, making it very economical. Moreover, it has an extremely low specific gravity, which does not impose a significant load on the tunnel. Additionally, its curing time is very short, making it suitable for projects that require quick construction. 【Features】 ○ Because it is a high-expansion polyurethane, the required material can be reduced by the expansion ratio, making construction simple and lightweight. ○ The short curing time allows for limited injection, and even in the presence of water inflow, the possibility of material separation and outflow is minimal, thus not adversely affecting the water environment. ○ The foamed solid forms a water-insoluble polymer compound with a three-dimensional structure, which is chemically stable and maintains its shape and strength over the long term. ○ Compliant with the "Guidelines for Safety Management of Polyurethane Injection Materials in Mountain Tunnel Construction." ○ A lightweight, compact injection machine that offers good workability and can be used in long and narrow environments. For more details, please contact us or download the catalog.

  • Safety and consumables

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