To address the uneven temporal and spatial distribution of water resources and water shortages in some regions, the construction of safe, efficient, and long service life water conveyance tunnels has become an important development direction in hydraulic engineering. As a key component for tunnel safety, the lining structure directly affects the long term stability of the project through its mechanical performance and durability. However, under high internal and external water pressure and complex boundary conditions, existing lining materials generally show insufficient crack resistance, tensile performance, and durability. In this paper, the instability and failure mechanisms of surrounding rock in water conveyance tunnels under complex stress conditions are analyzed. The application status of existing lining materials in engineering practice is reviewed. The limitations of ordinary concrete in ductility, toughness, and tensile performance are also discussed. On this basis, the mechanical properties and engineering effects of polypropylene fiber reinforced concrete, steel fiber reinforced concrete, and other fiber reinforced concretes used in tunnel linings are systematically summarized. Their advantages and disadvantages in crack resistance, tensile behavior, and construction adaptability are evaluated. In view of the limited improvement achieved by single fiber shotcrete, the potential advantages of hybrid fiber reinforced concrete in enhancing lining stability and durability are further summarized. The results indicate that the development of fiber reinforced concrete with multi scale synergistic enhancement is an important direction for improving the performance of water conveyance tunnel linings. This review can provide a reference for the optimal design and engineering application of lining materials in water conveyance tunnels.
DING et al. (Mon,) studied this question.