| 摘要 |
PROBLEM TO BE SOLVED: To provide the reinforcing construction method of a ballast under a railway track for reducing noise due to vibration during the passage of a train particularly. SOLUTION: The reinforcing method is characterized by driving an injection pipe in the neighborhood of the side of a sleeper embedded on the ballast, and injecting a ballast fixing agent from the pipe to be hardened. In addition, the ballast fixing agent is a two-liquid type urethane-based adhesive comprising a main agent comprising terminal isocyanate-group containing urethane prepolymer obtained to react organic polyisocyanate compound containing with polyether polyol containing at least ethylene oxide part and water as a hardener, and after the main agent is injected from the injection pipe, water is sprayed on the surface of the ballast.
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