Advances in Polymer Spray-Applied Waterproofing Technology and CSL Tunnel Support Structures

Le résumé fourni par la source

Leakage through tunnel linings remains a persistent engineering problem. Conventional sheet-membrane systems cannot fully resolve it because they contain numerous seams, are easily damaged, and cannot conform closely to the substrate. Polymer spray- applied waterproofing, represented by acrylate membranes, provides a seamless and highly adhesive alternative. This technology has enabled the development of composite shotcrete-membrane-shotcrete support structures, known as composite shell linings (CSLs). This review summarizes the film-formation mechanisms and performance-control strategies of acrylate spray membranes. It examines the principal factors governing interfacial bonding in CSL systems and their durability under long-term service. Drawing on numerical simulations and engineering applications, it further analyzes interlayer shear behavior and load distribution. The review aims to support wider engineering implementation and the development of improved CSL design theory.

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