�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��� �