State Road #3, Bitan Tunnel

To improve the tunnel subsidence, water and fractures, ground improvement was carried out using polyurethane resin grout to a depth of 1.5 meters.Application of polyurethane resin with quick-setting and high-strength characteristics, meant that the day after night work, the tunnel was open to traffic. In this case, the purpose of consolidating the ground work while maintaining the flow of the expressway traffic was attained.

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