EXHIBIT LISTReference No: HOC/10001Petitioner: Phase 2a Teach-insPublished to Collaboration Area: Friday 23-Mar-2018

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HOC/10001/0001

Phase 2a - TunnelsTim Smart

27 March 2018

P6 (1) HOC/10001/0002

Why Tunnel?

Terrain

SurfaceDisruption

Connectivity

P6 (2) HOC/10001/0003

Tunnel Locations

P6 (3) HOC/10001/0004

Tunnel Briefing Agenda

Construction

(1) Tunnelling techniques

(2) Settlement

(3) Construction aspects

Operational Aspects of Tunnelling

(1) Safety arrangements

(2) Vibration

Cost implications

(1) Costs of tunnelling

P6 (4) HOC/10001/0005

Construction – Tunnelling Techniques

Bored Tunnels

Shield type machines with precast segmental tunnel lining

Used when surface access is very limited at depths typically below one tunnel diameter

Longer tunnel lengths where economical to use machine

Cut and Cover Tunnels

Typically concrete box structures constructed in excavated ground

Used at shallower depths where there is good surface access

Mined/Sprayed Concrete Lining Tunnels

Mechanically excavated with sprayed concrete lining in suitable ground conditions

Used in shorter drives and cross passages

Construction Operational Aspects of Tunnelling Cost Implications

P6 (5) HOC/10001/0006

Bored TunnelsEarth Pressure Balance Tunnel Boring Machine (EPBM)

Construction Operational Aspects of Tunnelling Cost Implications

P6 (6) HOC/10001/0007

Bored TunnelsHS1 EPBM in factory showing back up arrangements

Construction Operational Aspects of Tunnelling Cost Implications

P6 (7) HOC/10001/0008

Precast Tunnel Segments

Construction Operational Aspects of Tunnelling Cost Implications

P6 (8) HOC/10001/0009

Construction Plan – Whitmore Heath

Construction Operational Aspects of Tunnelling Cost Implications

P6 (9) HOC/10001/0010

Operation Plan – Whitmore Heath

Construction Operational Aspects of Tunnelling Cost Implications

P6 (10) HOC/10001/0011

Construction Plan - Madeley

Construction Operational Aspects of Tunnelling Cost Implications

P6 (11) HOC/10001/0012

Operation Plan - Madeley

Construction Operational Aspects of Tunnelling Cost Implications

P6 (12) HOC/10001/0013

Cut and Cover Construction Methodology 1

Construction Operational Aspects of Tunnelling Cost Implications

P6 (13) HOC/10001/0014

Cut and Cover Construction Methodology 2

Construction Operational Aspects of Tunnelling Cost Implications

P6 (14) HOC/10001/0015

HS1 Cut and Cover Tunnel

Construction Operational Aspects of Tunnelling Cost Implications

P6 (15) HOC/10001/0016

Settlement & Rate of Tunnelling

The rate of tunnelling is dependent on ground conditions. It is also important in minimising settlement,

which is achieved by operating tunnel boring machines appropriately such as using Earth Pressure

Balance machines in “closed” mode.

In order to keep settlement to acceptable limits HS2 has specified maximum of 1% volume loss for bored

tunnels. The Promoter’s policy on ground settlement is set out in Information Paper C14.

Continuous 24 hour tunnelling also minimises settlement as it doesn’t allow time for the for the ground to

fully relax.

Construction Operational Aspects of Tunnelling Cost Implications

P6 (16) HOC/10001/0017

Construction Aspects – Noise from Tunnel Drive Site

Bored tunnelling activities and the associated local site material handling will be operated 24 hours a day.

Noise mitigation is provided by the standard means such as hoarding, muffling, baffles and noise

suppression on plant and equipment .

Tunnel sites will be subject to the same HS2 procedures set out under the Code of Construction practice

and will be subject to Local Authority Approval under Section 61 of Control of Pollution Act.

Construction Operational Aspects of Tunnelling Cost Implications

P6 (17) HOC/10001/0018

Construction Aspects – Noise from Tunnel Boring

Sound and vibration from the tunnel boring machine will be perceptible inside properties for a few days

as it passes beneath them.

The effects of ground‐borne sound and vibration from the machine on building occupiers will be

short‐term and is not considered to be significant.

Construction Operational Aspects of Tunnelling Cost Implications

P6 (18) HOC/10001/0019

Minimum Safety RequirementsFor tunnels under 1km in length

Place of Relative Safety

To adjacent independent tunnel tube every 500m

Fire Fighting Point defined as

Location inside or outside tunnel where fire fighting equipment can be used and passengers can

evacuate

Water supply capacity is a minimum of 800 1/min for 2 hours

Construction Operational Aspects of Tunnelling Cost Implications

P6 (19) HOC/10001/0020

Tunnel Cross Passage

Construction Operational Aspects of Tunnelling Cost Implications

P6 (20) HOC/10001/0021

Evacuation Walkway & Tunnel Cross Passage Opening HS1

Construction Operational Aspects of Tunnelling Cost Implications

P6 (21) HOC/10001/0022

Vibration Mitigation via “booted sleeper” track

Construction Operational Aspects of Tunnelling Cost Implications

P6 (22) HOC/10001/0023

Costs of Tunnelling

Linear Costs

Labour

Lining materials

Excavated material disposal

Ground monitoring

Ground treatment

Tunnel logistics

Fixed Costs

Tunnel Boring Machine typically

£15m to £25m

Back up material handling

similar cost order

Power supply

Mechanical and Electrical

systems

Incremental Cost increases

Surface arrangements for drive

sites, reception sites, tunnel

logistics

Introduction of shafts

Increase in number of cross

passages

Introduction of shafts and

increase in tunnel Mechanical

and Electrical systems.

Operational Aspects of Tunnelling Construction Cost Implications

P6 (23) HOC/10001/0024

Cost vs. Length (Indicative)

Operational Aspects of Tunnelling Construction Cost Implications

P6 (24) HOC/10001/0025