Abstract：In the construction of Lee Tunnel of the London sewer system, steel fiber reinforcement has been applied to concrete segment primary lining and secondary lining cast-in-place self-compacting concrete (SCC). When applying steel fiber reinforcement to concrete segments, refer to the relevant specifications of fiber reinforced concrete structures in fib (The international federation for structural concrete) model code 2010, and, determine whether the relevant technical requirements of the concrete structures are met by the results of the flexural strength test of fiber reinforced concrete according to Euro standard test method: EN14651. Regarding the application of steel fiber reinforcement for the second lining self-compacting concrete cast-in-place, according to the four-point loading flexural test results are using large specimens. It is confirmed that the steel fiber(Replace steel bars)reinforced concrete has the following structural properties: such as the strain hardening behave; strain distribution; crack control effect (the occurrence, distribution and development). Moreover, by data analysis means such as finite element analysis, the above results were further verified. It was confirmed that steel fiber reinforcement can meet the performance requirements of lining concrete, suitable to for deep drainage tunnel: Lee tunnel project.
