This document provides details on the proposed Metro North project in Dublin, Ireland, including a €2.4 billion budget. It outlines the 18km route, which includes 7.5km of tunnels, 2.7km of cut-and-cover tunnels, 2.25km of viaducts, and 5.5km at road level. There will be 15 stations, with 9 underground and 6 at road level. The presentation aims to provide an understanding of the construction, costs, and timeline to stakeholders and politicians. It includes information on tunnel boring machines, station excavation, concrete works, viaduct construction, and other aspects of the large infrastructure project.

1. Metro North Dublin Ireland, Proposed – Construction €2.4bn
Included
Route
Programme Graphic
Tunnelling Construction
Stations Construction
Cost
Details
Lengths
Overall 18 km
Tunnel 7.5 km
Cut & Cover 2.7 km
Viaduct 2.25 km
Road Level 5.5 km
Stations 15 Nr.
Underground 9 Nr.
Road Level 6 Nr.
Tunnels & Underground Stations
Route
3D image to show Sequence, Method & Plant.
David H Moloney
29th June 2017
Purpose of presentation to give the Public, Stakeholders and Politicians
an understanding of the Construction, Cost and Timeline
ⓒ David H Moloney
Schematic Longitudinal Profile
Project Execution Plan
Details of how a Metro is constructed, and how the progress, safety
and quality will be monitored and controlled.

2. Table of Contents

3. Overview

4. Route of Metro North
ⓒ David H Moloney

5. Schematic with Principal Quantities
David H Moloney
Schematic Longitudinal Profile
ⓒ David H Moloney

6. Programme - Time Chainage Diagram
ⓒ David H Moloney

7. Tunnels & Underground Stations
TBM TBM
Tunnel Tunnel
TunnelViaduct Along Street
Programme Animation
ⓒ David H Moloney
Schematic Longitudinal Profile

8. Cost Comparisons of Metro Projects
Dubai Route
2020
UAE
(To Start)
Red Line North
Doha
Qatar
(In Progress)
Red Line South
Doha
Qatar
( In Progress)
Metro North
Dublin
(Proposed)
Dart
Underground
Dublin
(Proposed)
Port Tunnel
Dublin
(2005)
Overall Cost €2,450 million €1,803 million €1,500 million €2,400 million €2,000 million ? €752 million
Cost per km €158 million /k m €140 million / km €108 million / km €134 million / km €400 million / km ? €134 million / km
Overall Length 15.5 km 13 km 14m 18 km 5 km 5.6 km
Tunnel 4 km
Single Tunnel
11.6 km
Twin Tunnels
14 km
Twin Tunnels
7.5 km
Twin Tunnels
5 km
Twin Tunnel
4.5 km
Road Tunnel x 2
Cut & Cover 0 2.7 km 0
Elevated 10.5 km 2.2 km 0 Not applicable
Road Level 0 5.5 km 0
Stations 7 Nr. 7 Nr. 5 Nr. 14 Nr. 3 Nr. Not applicable
Capacity 13,000 Passengers per
hour
19,800 Passengers per
hour
? Not applicable
ⓒ David H Moloney

9. Advantages of Rail Benefits of Metro to commuters
1. Time saving for commuters 4. Reduction in accident
2. Reliable and safe journey 5. Reduced fuel consumption
3. Reduction in atmospheric pollution 6. Reduced traffic congestion

10. Contractor’s General Items

11. Contractor’s Temporary Site Facilities
ⓒ David H Moloney
Brief Description
Contractors Site facilities comprise:
Offices, Canteens, Toilets, Drying Rooms,
Stores, Plant Yard, generators and
Workshops.
GeneralItems

12. Concrete Batching Plant David H Moloney
ⓒ David H Moloney
Concrete batching plant comprises -
concrete mixer, control cabin, silos for
cement and fly ash, aggregate bins and
conveyor belt system to feed the mixer.
Also aggregate storage bays and water
storage tanks.
The mixing is computer controlled and has
a dynamic screen display, showing the
process. Material storage capacity to
match two days concrete production

13. Quarry & Aggregate Production
3D image to show Sequence, Method & Plant.
ⓒ David H Moloney

14. Reinforcement Cutting & Bending Yard David H Moloney
ⓒ David H Moloney
Reinforcement in 12 m lengths. Delivery in 3 ton Bundles Reinforcement cut to length by Shearing Machine
Reinforcement Bent to Shape by Bending Machine Reinforcement that is cut and bent is Bundled for delivery to work site

15. Site Hoarding examples
ⓒ David H Moloney
GeneralItems

16. Wheel Wash Drive-throughGeneralItems

17. Weighbridge & Sheeting Access
ⓒ David H Moloney
GeneralItems

18. Sheet Pile Temporary Shaft
ⓒ David H Moloney
GeneralItems
Brief Description
Sheet Pile Temporary shaft is used to enable an
excavation for a deep structure.
The construction sequence is:
Install sheet-piles.
Excavate and install bracing.
Excavate to final level.
Construct concrete structure.
Backfill, remove bracing and sheet-piles

19. Sheet Pile Temporary Shaft
ⓒ David H Moloney
GeneralItems
3D Animation to show Sequence

20. FalseworkGeneralItems
Brief Description
Falsework to support Bridge deck formwork

21. Dewatering
ⓒ David H Moloney
GeneralItems
Brief Description
Construction dewatering is the removal or drainage of
groundwater and or surface / rain water usually by
pumping to keep the works dry.

22. Dewatering
ⓒ David H Moloney
GeneralItems

23. Dewatering by Wellpoints
ⓒ David H Moloney
GeneralItems

24. Dust Suppression
ⓒ David H Moloney
GeneralItems

25. Temporary Fence type 2
ⓒ David H Moloney
GeneralItems
Brief Description
Temporary fence on precast beam for airport.

26. Traffic Management
ⓒ David H Moloney
GeneralItems
Brief Description
Traffic management plans are
necessary when working on or beside
roads

27. Traffic Management - Realign Motorway under new Bridges
ⓒ David H Moloney
GeneralItems

28. Health, Safety & Environmental

29. Existing Underground Utilities
ⓒ David H Moloney
Earthworks
Brief Description
Before digging
establish the location
and route of
underground utilities.
Locator to find Utilities
Spray Paint to mark pavement

30. Existing Underground Utilities & Overhead Cables - Safety Measures
ⓒ David H Moloney
Earthworks

31. Safety Precautions

32. HSE Monitoring & Reporting - Dashboard Dashboard is a single page, graphical representation of
current HSE Issues and historical trends

33. Environmentally Friendly Site Air, Noise, Water & Soil Pollution

34. Water Pollution PreventionGeneralItems

35. Geotechnical

36. Diaphragm Wall Construction - Sequence, Plant & Methods
3D image to show Sequence, Method & Plant.
For construction details see my YouTube Channel
ⓒ David H Moloney

37. Earthworks

38. Tunnels & Underground Stations
3D image to show Sequence, Method & Plant.
David H Moloney
ⓒ David H Moloney

39. Excavate & Load, Cart, Tip & Return
Brief Description
Cycle Time for 7km haulage distance
using an Excavator 45 tonne weight
and Dumper with a 40 tonne capacity,
the cycle time is 34 minutes
Earthworks
7 minutes
14 minutes
3 minutes
14 minutes 7 km
7 km

40. Underground Station Excavation

41. Underground Station Construction

42. Rock Excavation Underground
Excavate with Roadheader
Drill & Fit Rock Bolts
Spray Mortar as Lining
Excavators with Rock Breaker
& Rock Rotary Cutter
Roadheader
ⓒ David H Moloney
Using Mining Techniques

43. Bed Rock - Type & Depth
Ground Conditions
The limestone bedrock is between 5 and 25 metres below ground level. The overlying deposits are generally boulder clay with thin layers of sand and gravel. The water table is
between 2 and 4 metres below ground level.
The Bedrock Geology Map of Ireland, gives the rock as limestone and mudstone, along the tunnel route.

44. Rock - Excavability
Brief Description
The excavability of rock depends
mainly on the rock strength and the
layer thickness. This diagram shows
excavation methods for rock of
various strengths and thicknesses,
with a free face.
ⓒ David H Moloney
Earthworks

45. Station Excavation - Soil on Rock Situation
Rock Nailing, Rock breaking & Excavation
ⓒ David H Moloney

46. Concrete

47. Tunnel Wall Segments Casting
Clean Mould
Lift Precast Segment out of mould
after 18 hours.
Reinforcement
fabricate
Reinforcement
into Mould
Concreting
Segment Storage
Casting Cycle Time 24 hrs
ⓒ David H Moloney

48. Tunnel Precast Segments

49. Reinforced Wall Construction Sequence
ⓒ David H Moloney
Concrete
Brief Description
The sequence to construct a reinforced concrete wall is as
follows:
Tie the reinforcement.
Erect stop-ends and the wall shutters.
Pour and vibrate the concrete mix.
Remove the shutters after the concrete has hardened.
.
Cycle Time
Pour per Day

50. Reinforced Wall Construction Sequence
ⓒ David H Moloney
Concrete

51. Reinforced Structure Construction Sequence
ⓒ David H Moloney
Concrete
Brief Description
The general sequence to construct a reinforced concrete tank
is as follows-
1. Construct the floor and wall panels in a hit and miss pattern.
2. Construct the floor and wall corners and T shape panels.
3. Construct the roof working outwards from the back.

52. Reinforced Structure Construction Sequence David H Moloney
ⓒ David H Moloney

53. Bridge & Post-tensioning
Concrete
Brief Description
The sequence to post-tension a bridge
deck is as follows;
Fix the ducts and anchorages.
Install the stressing strand.
Concrete the deck.
Stress the strands and lock at
anchorages.
Grout the ducts.

54. Bridge & Post-tensioning
Concrete

55. Bridge & Post-tensioning
Concrete

56. Bridge Construction Sequence
David H Moloney
Piling Surcharge Abutments
Remove Surcharge Abutments
Deck centre
Post-tensioning Fascia & Waterproof deck Complete Bridge
PiersOverview
Deck Ends
Images with Schematic 3D view, Photos & Timeline
ⓒ David H Moloney

57. Post-tensioning Bridge Deck David H Moloney

58. Waterproofing Spray on System
Miscellaneous

59. Waterproofing Spray on Tests
Miscellaneous

60. Underground Stations David H Moloney
ⓒ David H Moloney

61. Large Floor Concrete Pour

62. Rail Viaduct
Concrete
Brief Description
Shown is the construction of a light rail viaduct where
an overhead gantry was used to lift and place the
precast concrete viaduct segments.

63. Viaduct Construction
3D image to show Sequence, Method & Plant.
For construction details see my YouTube Channel
David H Moloney
ⓒ David H Moloney

64. Viaduct Construction David H Moloney
ⓒ David H Moloney

65. Viaduct Segments Launching
ⓒ David H Moloney

66. Viaduct Segments Casting David H Moloney
Casting Method
The concrete segments are manufactured
using the short-line, match-casting method.
Match-casting is when sequential segments are
poured against the previous cast segment, this
ensures that the segments will fit perfectly on
site.
Horizontal and vertical curves are achieved by
setting the cast segment at a rotation in either or
both axis to the mould used to cast the next
segment.
ⓒ David H Moloney

67. Viaduct Segments – Short-line, Match Casting Method
David H MoloneyMatch-casting is when sequential segments are poured against the previous
cast segment, this ensures that the segments will fit perfectly on site.
Cycle Time 24 hrs

68. Piling

69. Piling Construction - Plant & Methods
Brief Description
Piling Plant, Equipment and Material;
Crawler Crane, Piling Hammer, Temporary Casing,
Piling Rig, Concrete Pump, Concrete Mixer Trucks,
Tremie Pipe and Reinforcement Cage
Piling

70. Piling Construction - Plant, Methods & SequencePiling

71. Piling Construction - Plant & MethodsPiling

72. Piling Construction - Vertical PilesPiling

73. Piling Construction - Raking PilesPiling

74. Piling Construction - Raking PilesPiling

75. Pile Load Test
ⓒ David H Moloney
Piling
Brief Description
A jack is used to load the pile in steps and
gauges measure any settlement.

76. Secant Pile Construction - Sequence, Plant & Methods
3D image to show Sequence, Method & Plant.
For construction details see my YouTube Channel
ⓒ David H Moloney

77. Roads & Paving

78. Asphalt Batching Yard
Roads&Pavings

79. Road Construction Sequence Animation

80. Tunnel

81. Tunnel Design
Twin Tunnels single track with
Cross passages at 250m intervals
for emergency evacuation
Tunnels in rock to avoid ground &
building settlement.
Depth 25 metres on average
ⓒ David H Moloney

82. Cut & Cover Tunnel Construction
Sequence -Traffic and utilities are diverted, excavate trench, construct & backfill to bury.
To prevent the faces of the excavation from collapsing, different measures are used –
batter the faces, diaphragm walls, secant piles or a combination of soil nailing and
shotcreting.

83. Ramp Construction
Sequence -Traffic and utilities are diverted, excavate, construct and backfill to sides.
To prevent the faces of the excavation from collapsing, different measures are used – batter
faces, diaphragm walls, secant piles or a combination of soil nailing and shotcreting.
ⓒ David H Moloney

84. Tunnel Boring Machine (TBM)
Cutting Head rotates to Dig
Excavated material removed
by conveyor belt
Lifting muck to surface
with skip
Placing Concrete
Segments

85. Tunnel Boring Machine (TBM)
Cutting Head rotates
7 nr. Precast segments
form rings that line the
tunnel Excavated material removed
by conveyor belt
ⓒ David H Moloney

86. Tunnel Fit-out Rail, Electricals, Ventilation

87. Tunnel Fit-out
Install Sleepers & Rails
Concrete Batching Train for Floor Slab
Drilling Machine for Utilities Brackets

88. Commissioning, Testing, Handover & Opening
Purpose to test and ensure that everything (e.g. trains, escalators, lifts, ticket barriers) works as it should.
ⓒ David H Moloney

89. Miscellaneous Works

90. Fencing
ⓒ David H Moloney
Sequence of Construction
Clear Scrub & Grade ground
Fix Corner & Strainer Posts
Fix Intermediate Posts
Fix Line Wire, Chain-link & Razer wire
Concrete ground beam

91. Progress Monthly, Monitoring & Reporting - Dashboard
Dashboard is a single page, graphical representation of current
progress and historical trends

92. Histogram Charts for Resources & Outputs
Concrete, Manpower, TBM,
Manpower per Discipline Concrete per Location
Numbers for each month of the Project Quantity for each month of the Project
ⓒ David H Moloney

93. Plant & Equipment List & Worker’s Job Titles
ⓒ David H Moloney

94. Organogram
Brief Description
Shown are the line and
lateral relationships
between the various team
members and their relative
position in the site
organisation.

95. Other Projects

96. Luas – Dublin, Tram / Light Rail System Construction Sequence & Methods
Install Traffic Control Fencing & Welfare Facilities Divert Underground Utilities Excavate
Prepare Formation Reinforcement & Rails Paving
Paving Information Sign Trams in Operation Trams in Operation
Reinforcement & Rails
ⓒ David H Moloney

97. Production by David H Moloney
See my YouTube Video on Dublin Metro North
My YouTube Channel link: https://www.youtube.com/channel/UCeJR9J7svhBd-C0ZoAH2fhQ
ⓒ David H Moloney