SR (Space Lock) - Method 2 [Backfill of the Lining Void]
Cavity backfill injection method using highly plastic grout with excellent limited injectability.
The SR method is a construction technique that involves injecting filling material into the voids behind the lining of existing tunnels or behind concrete structures, thereby integrating the ground and the structure. It excels in limited injectability that meets the required quality for the filling material in the back voids. 【Construction Procedure】 Air mortar is prepared by mixing a mortar made of a specified amount of cement, filling material, and water with foam generated by a foaming machine. This air mortar and the plasticizer "SRP-L" are each pumped and injected into the void while being mixed together at the injection point.
basic information
- It has plasticity and is suitable for limited injection. - It is less likely to deviate into tiny cracks in the ground or concrete, allowing for efficient injection. - It has a high resistance to material separation in water, resulting in uniform and stable strength. - Being inorganic, it is environmentally friendly. - As an air mortar, it is lightweight.
Price range
P1
Delivery Time
OTHER
Applications/Examples of results
○Construction Achievements (excerpted) - Hokuriku Expressway, Tsuruya District Tunnel Backfill Injection Work (FY 2013) 1,541 m³ - Chuo Expressway, Ena Mountain Tunnel and other 1 TN Repair Work (FY 2013) 3,655 m³ - Chuo Expressway, Ena Mountain Tunnel and other 1 TN Repair Work (FY 2014) 3,708 m³
Detailed information
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Plasticizing material (SRP-L) is a plasticizing agent developed for the SR-2 method. By mixing it into air mortar composed of cement, fine aggregates, foaming agents, and water in a 1.5 shot, it quickly gels during injection, providing plasticity. Photo: Flow of Solution A
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What is plasticized material (SRP-L)? Photo: Flow value measurement after adding liquid A + liquid B (plasticizer).
