When installing sewers, tunnels and other infrastructure built using a tunnel boring machine (TBM), GFRP can be used as a primary reinforcement for concrete.
Lapho ufaka indle, imigudu kanye nezinye izingqalasizinda ezakhiwe kusetshenziswa umshini wokubambisa umhubhe (iTBM), I-GFRP lungasetshenziswa njengokuqinisa okuyinhloko kokhonkolo.