Large diameter shield tunnel is the main construction form of long and large tunnels that cross sea and river,which has the advantages of safety,economy,efficiency,and intelligence.Fiber Reinforced Polymer(FRP)possess the advantages of light weight,high strength,corrosion resistance,fatigue resist-ance and design-ability,which can be used to replace steel to address engineering problems in complex un-derground service environments.The research and applications of FRP at home and abroad were presented from four typical projects of large-diameter shield tunnel construction,such as deep foundation excavation supporting structure,underground diaphragm wall,shield tunnel internal structure,and mud circulation pipe.The results showed that the mechanical and service properties of FRP could meet the requirements in the application of underground foundation excavation supportings,shield tunnels and other structures.Fi-nally,the application of FRP materials in the underground engineering structures was prospected according to the research and application states and current problems of FRP.
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