CONCRETE CORROSION OF THE XICHUAN RIVER FLOOD-DISCHARGING TUNNEL

On the basis of analyzing concrete material performance,environment and geological conditions,and microorganism in the xichuan river flood-discharging tunnel most basic and direct reason of concrete corrosion is forward.Bad construction quality and change of hydrogeological condition led to chemical property worsening of the tunnel groundwater.According to the corrosion mechanism of different hole sections an unbalanced shelter scheme is presented.