scope:

The Scope of this Manual is to provide guidance on the application of the requirements for the life cycle of Deep Tube Tunnel assets owned by LU through the following life cycle stages:

Inception and design

Construction, installation, testing and commissioning

Inspection

Analytical Assessment

Condition Assessment and certification

Maintenance

Strengthening and renewal

Decommissioning

This manual mirrors the sub-section headings of LU standard 1-055 at the start of each life cycle section, but additionally has further sub-sections added to each lifecycle section where there is further guidance material available to LU that does not specifically relate to the sub-section headings used in the standard, or is better set out separately.

The information contained in this Manual is derived mainly from historical information contained in existing LU documents and therefore does not necessarily reflect current good practice. Where possible, existing historical information has been supplemented by references to current good industry practice.

This manual replaces 5-01304-006 A1. The Manual has been re formatted and renumbered. There were no technical changes.

Purpose

The purpose of this Manual of Good Practice is to support LU Standard 1-055 (Civil Engineering - Deep Tube Tunnels and Shafts) and give guidance on established good practice solutions that meet the requirements of that standard. The Deep Tube assets comprise:

Platform tunnels

Concourse tunnels

Station passageway tunnels

Running tunnels

Cross passages between running tunnels

Step plate junctions

Crossover tunnels

Depot approach tunnels (e.g. London Road)

Overrun tunnels

Siding tunnels

Inclined shafts (e.g. escalator shafts)

Vertical shafts (e.g. ventilation, access, service, lift and substation shafts).

Disused tunnels

Cable shafts

Pump shafts

Disused shafts

Tunnel headwalls

Tunnel ringwalls

Tunnel openings and junctions

Other tunnels and shafts constructed by tunnelling methods