一种高性能混凝土衬砌材料制备及引水隧道施工研究

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中图分类号：TQ178 文献标志码：A文章编号：1001-5922（2026）1-0131-04

Abstract：This study investigated the efects of multi-scalepolypropylene fiberson the propertiesofhigh-performance concrete.Four groups of single-fiber-doped specimens and three groups of hybrid-fiber-doped specimens were designed，and the mechanical properties as well as shrinkage and crack resistance of the concrete were tested.The results showed that fiber incorporation had litleefect onthe compressive strength ofconcrete butcould significantly improve its tensile strength，among which the three-scale hybrid groupA7exhibited the optimal tensile strength；the influence range of fiber incorporation on the elastic modulus of concrete was within ±3% ，and the 28-day elastic modulus of group A7 wasthe highest.In terms of shrinkage performance，group A7 had the lowest free shrinkage strain andrestrainedshrinkage strain，demonstrating thebest crack resistance.Meanwhile，fieldapplicationverification ndicated thatthelining ofgroup A7hadnocracksafter18O days，and itsrebound strength was alsobeter than thatofthereferencegroup.Multi-scale hybrid fiberscan significantly improve the crack resistanceand enginering applicabilityof concrete through synergistic effcts，providing a new idea for the design of lining materials for diversion tunnels.

Key words： high performance concrete; polypropylene fiber; multi-scale mixing; crack resistance; water diversion tunnel lining

随着我国基础设施建设的快速发展，引水隧道作为水利工程的重要组成部分，衬砌结构的耐久性和抗裂性能直接关系到隧道的安全运行和使用寿命[12]。（剩余4994字）