TUNNELLING 8 There are two basic areas of application for SPESAN injection resins in tunnel construction 1 The sealing of water ingresses and the stabilisation of unstable rock masses fault zones in the tunnels with SPESAN WS SPESAN B or SPESAN WV SPESAN B 2 The permanent sealing of cracks gravel cavities and construction joints in the tunnel inner shell with the slow reacting SPESAN WL SPESAN B Both injection packers and injection hoses can be used for injection Leaking tunnel inner shell Sealing joints Injection against water under pressure during the curtain injection

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