CONTENTS

 1 Scope 
2 References 
3 Definitions  
4 Abbreviations and acronyms        
5 Conventions     
6 Maintenance of cable tunnels        
        6.1 Inspection  
        6.2 Inspection technologies      
        6.3 Countermeasures   
Appendix I – Korean experience with maintenance of cable tunnels     
        I.1 Typical deteriorations       
        I.2 Frequency of inspection   
        I.3 Typical inspection items    
        I.4 Tunnel inspection by GPR
Bibliography