Fig. 6From: Large-scale inflatable structures for tunnel protection: a review of the Resilient Tunnel Plug projectPhase 2b. a Three-layer membrane configuration comprised of Vectran woven webbing (L1), protective Vectran fabric layer (L2), and inner bladder layer of urethane-coated polyester (L3). Unconfined inflation of (b) full-scale three-layer surrogate plug; (c) full-scale three-layer Vectran plug [44, 87, 88]Back to article page