scope:

This part of the handbook applies to use of the Tunnel examination report template release 1 for reporting:

• Detailed Examinations, Visual Examinations and Additional Examinations of lined Tunnels;

• Unlined Tunnel Examinations, Visual Examinations and Additional Examinations of unlined Tunnels.

The report template shall be used to derive the Tunnel condition marking index score for lined Tunnels.

The template may be used to report examinations but the Tunnel condition mark index will not be derived for Tunnels sections constructed with:

• segmental concrete linings;

• segmental metallic linings;

• jack arches;

• slab decks;

• no linings.

Purpose

The purpose of this part of the handbook is to give guidance to the methods to be used and data to be provided to record the results of an examination of a Tunnel, and to derive the Tunnel condition marking index score.