Tunnel Backfill Repair Method Using Urethane Injection "Tn-p Method"
Cost reduction with 40 times high foaming polyurethane! Improved workability with compact injection equipment!
The "Tn-p Method," which is a "NETIS Utilization Promotion Technology (formerly registered)," is a tunnel repair technique that involves injecting polyurethane foam into the void behind the tunnel lining for repairs. It is effective in preventing sudden collapse accidents of the ground behind the tunnel lining. With 40 times the expansion of conventional polyurethane, it is economical, and the injection equipment is compact and easy to work with. Additionally, it is lightweight, which reduces the load on the tunnel, and it solidifies within minutes, thereby reducing the risk of accidents due to material leakage from cracks. 【Features】 - The injection equipment is compact, and the injection material comes in drums, allowing everything to be loaded onto a 4-ton truck. - Ultra-lightweight, reducing the load on the tunnel lining. - Rapid solidification reduces the risk of accidents due to material leakage. - Environmentally friendly, as it uses no fluorocarbons in the foaming agent. ★ To promote the spread of this method, we have established the "Polyurethane Void Injection Association." For more details, please visit the official website at the URL below. https://tnp-method.com/ *You can view the details of the method immediately from the [Catalog Download].
basic information
【Material Properties of TN-p Method】 Original Liquid Name: SK-02 Foaming Ratio: 40 times Foam Density: 30±3kg/m3 Compressive Strength: 0.14N/mm2 or more Cream Time: 14±5 seconds Gel Time: 60±10 seconds Combustibility: Passes JIS A9521 *In addition to the above, there are types with 12 times, 20 times, and 30 times foaming. *40 times foaming is also available in winter specifications. 《Recommended!》 【Urethane LH Method】 ◎ On-site foamed urethane is sprayed on-site to construct embankments. ◎ Density is about 1/50 that of soil or concrete, making it ultra-lightweight. ◎ Shape adaptability allows for embankment construction to fit complex terrain. ◎ Foaming equipment is compact, and materials are delivered in liquid form, saving space in the construction yard. ◎ Self-adhesive properties enable the construction of integrated embankments. 【EPS Method】 ◎ Large foamed polystyrene blocks are stacked to construct embankments. ◎ Density is about 1/100 that of soil or concrete, making it ultra-lightweight. ◎ Rapid construction is possible over large areas. ◎ Its self-supporting nature effectively reduces soil pressure. ◎ Manual construction helps to mitigate noise. *For more details, please download the catalog or contact us.
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For more details, please refer to the catalog or feel free to contact us.
