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EXHIBIT LISTReference No: HOC/10001Petitioner: Phase 2a Teach-insPublished to Collaboration Area: Friday 23-Mar-2018
Page 1 of 25
No Exhibit Name Page
1 P6 Tunnel Presentation.pdf (P6) 2 - 25
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