ST HELENA TUNNEL
T2E Upgrade
Pacific Highway
From Tintenbar to Ewingsdale

12th AUSTRALIAN TUNNELLING CONFERENCE 2013
Pres...
St Helena Tunnel
T2E
CONTENTS
1. 
2. 
3. 
4. 
5. 
6. 

Project Overview
Progress
Geology
Excavation and Temporary Support
...
T2E
St Helena Tunnel

Project Overview
St Helena Tunnel
T2E

Project Location

4
St Helena Tunnel
T2E
Project Key Data

  16.3km of Dual Carriageway
  10km of Access Roads
  9 Bridge Structures / 3 Un...
St Helena Tunnel
T2E
Existing
Highway
South
Portal

St Helena
Road

North
Portal

Upgraded
Highway

Location of St Helena ...
St Helena Tunnel
T2E

Byron
Bay
Existing
Highway

View from St Helena Hill to Byron Bay
7
St Helena Tunnel
T2E
Tunnel Key Data
  Road tunnel: 2 tubes 3 lanes each (future consideration)
  Length of tunnels:
  ...
St Helena Tunnel
T2E
St Helena
(210 m2)

CLEM 7 (120 m2)
M5 East (55 m2)

Tunnel Cross Section: Size Compared to Previous ...
St Helena Tunnel
T2E

Progress
St Helena Tunnel
T2E
South
Portal

North
Portal

Tunnel Progress: Heading
11
St Helena Tunnel
T2E

Northbound Tunnel from South: Heading and Bench Excavation
12
St Helena Tunnel
T2E

Tunnel Control Centre: Excavation for Deluge Tanks
13
St Helena Tunnel
T2E

Assembly of Tunnel Formwork
14
St Helena Tunnel
T2E

Geology
St Helena Tunnel
T2E

Regional Geology: Typical Basalt Columns (Fingal Heads)
16
St Helena Tunnel
T2E

Regional Geology: Typical Basalt Columns (Byron Bay Quarry)
17
St Helena Tunnel
T2E
Deep Zone of
Extreme Weathering

Altered, Formerly
Weathered Zones and
Deposits

Basalt

Tunnel Geolo...
St Helena Tunnel
T2E

South and Central Section

North Section

Tunnel Geology: Cross Sections
19
St Helena Tunnel
T2E

Tunnel Geology: Basalt Layers, South
20
St Helena Tunnel
T2E

Tunnel Geology: Basalt Layers, South
21
St Helena Tunnel
T2E

Tunnel Geology: Weathered Rock over Basalt Layers, North
22
St Helena Tunnel
T2E

Excavation and Temporary Support
St Helena Tunnel
T2E

Drill and Blast: Charged Face
24
St Helena Tunnel
T2E

Drill and Blast: Blast
25
St Helena Tunnel
T2E

Drill and Blast: Muck Pile
26
St Helena Tunnel
T2E

Excavator / Rock Hammer
27
St Helena Tunnel
T2E

Temporary Support: Support Types
28
St Helena Tunnel
T2E

Temporary Support: Support Type Selection
29
St Helena Tunnel
T2E

Temporary Support: Rock Bolts
30
St Helena Tunnel
T2E

Temporary Support: Shotcrete
31
St Helena Tunnel
T2E

Temporary Support: Lattice Girders
32
St Helena Tunnel
T2E

Temporary Support: Spiling Bars
33
St Helena Tunnel
T2E

Temporary Support: Face Nails
34
St Helena Tunnel
T2E

Permanent Support
St Helena Tunnel
T2E

Permanent Lining: View from Northern Portal
36
St Helena Tunnel
T2E

Permanent Lining: 500 – 800 mm Cast in Situ Concrete
37
St Helena Tunnel
T2E

Permanent Lining Reinforcement (Not T2E)
38
St Helena Tunnel
T2E

Permanent Lining Formwork (Not T2E)
39
St Helena Tunnel
T2E

Final Lining: Completed Tunnel
40
St Helena Tunnel
T2E

Waterproofing
St Helena Tunnel
T2E
Lower Water
Level

Upper Water
Level

Tunnel Hydrogeology: Long Section, Northbound Tube

42
T2E
St Helena Tunnel

Spring

Spring Feeding a Dam at the Northern Portal
43
T2E
St Helena Tunnel

Water Inflows during Excavation
44
T2E
St Helena Tunnel

Waterproofing: Waterproofing Membrane (not T2E)
45
T2E
St Helena Tunnel

Thank you for your
attention.
Any Questions?

46
T2E
St Helena Tunnel
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Albrecht Mueller, Lend Lease: St Helena Tunnel, Pacific Highway upgrade

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Albrecht Mueller, Engineering Manager – Tunnelling,
Engineering, Lend Lease delivered this presentation at the 2013 Australian Tunnelling conference. The two day conference is supported by the Australasian Tunnelling Society and brings together tunnelling leaders, engineers and industry experts to share best practice in tunnelling design, construction, safety and maintenance.

The 2012 program focussed on updates from Australasia’s current and future projects, plus case studies from leading International projects - sharing best practice and lessons learnt from the forefront of the latest tunnelling projects. For more information about the event, please visit the conference website: http://www.informa.com.au/tunnellingconference

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Albrecht Mueller, Lend Lease: St Helena Tunnel, Pacific Highway upgrade

  1. 1. ST HELENA TUNNEL T2E Upgrade Pacific Highway From Tintenbar to Ewingsdale 12th AUSTRALIAN TUNNELLING CONFERENCE 2013 Presented by: Albrecht Mueller
  2. 2. St Helena Tunnel T2E CONTENTS 1.  2.  3.  4.  5.  6.  Project Overview Progress Geology Excavation and Temporary Support Permanent Support Waterproofing
  3. 3. T2E St Helena Tunnel Project Overview
  4. 4. St Helena Tunnel T2E Project Location 4
  5. 5. St Helena Tunnel T2E Project Key Data   16.3km of Dual Carriageway   10km of Access Roads   9 Bridge Structures / 3 Underpasses / 2 Culverts   3,200,000 m3 Bulk Earthworks   434m long tunnel through St Helena Hill 5
  6. 6. St Helena Tunnel T2E Existing Highway South Portal St Helena Road North Portal Upgraded Highway Location of St Helena Tunnel 6
  7. 7. St Helena Tunnel T2E Byron Bay Existing Highway View from St Helena Hill to Byron Bay 7
  8. 8. St Helena Tunnel T2E Tunnel Key Data   Road tunnel: 2 tubes 3 lanes each (future consideration)   Length of tunnels:   Cut and Cover Sections at each end   Spacing of egress cross passages:   Area of tunnel cross section:   Excavated volume: 2 x 434m 2 x 39m 120m 210m2 150,000m3 8
  9. 9. St Helena Tunnel T2E St Helena (210 m2) CLEM 7 (120 m2) M5 East (55 m2) Tunnel Cross Section: Size Compared to Previous Projects 9
  10. 10. St Helena Tunnel T2E Progress
  11. 11. St Helena Tunnel T2E South Portal North Portal Tunnel Progress: Heading 11
  12. 12. St Helena Tunnel T2E Northbound Tunnel from South: Heading and Bench Excavation 12
  13. 13. St Helena Tunnel T2E Tunnel Control Centre: Excavation for Deluge Tanks 13
  14. 14. St Helena Tunnel T2E Assembly of Tunnel Formwork 14
  15. 15. St Helena Tunnel T2E Geology
  16. 16. St Helena Tunnel T2E Regional Geology: Typical Basalt Columns (Fingal Heads) 16
  17. 17. St Helena Tunnel T2E Regional Geology: Typical Basalt Columns (Byron Bay Quarry) 17
  18. 18. St Helena Tunnel T2E Deep Zone of Extreme Weathering Altered, Formerly Weathered Zones and Deposits Basalt Tunnel Geology: Long Section, Northbound Tube 18
  19. 19. St Helena Tunnel T2E South and Central Section North Section Tunnel Geology: Cross Sections 19
  20. 20. St Helena Tunnel T2E Tunnel Geology: Basalt Layers, South 20
  21. 21. St Helena Tunnel T2E Tunnel Geology: Basalt Layers, South 21
  22. 22. St Helena Tunnel T2E Tunnel Geology: Weathered Rock over Basalt Layers, North 22
  23. 23. St Helena Tunnel T2E Excavation and Temporary Support
  24. 24. St Helena Tunnel T2E Drill and Blast: Charged Face 24
  25. 25. St Helena Tunnel T2E Drill and Blast: Blast 25
  26. 26. St Helena Tunnel T2E Drill and Blast: Muck Pile 26
  27. 27. St Helena Tunnel T2E Excavator / Rock Hammer 27
  28. 28. St Helena Tunnel T2E Temporary Support: Support Types 28
  29. 29. St Helena Tunnel T2E Temporary Support: Support Type Selection 29
  30. 30. St Helena Tunnel T2E Temporary Support: Rock Bolts 30
  31. 31. St Helena Tunnel T2E Temporary Support: Shotcrete 31
  32. 32. St Helena Tunnel T2E Temporary Support: Lattice Girders 32
  33. 33. St Helena Tunnel T2E Temporary Support: Spiling Bars 33
  34. 34. St Helena Tunnel T2E Temporary Support: Face Nails 34
  35. 35. St Helena Tunnel T2E Permanent Support
  36. 36. St Helena Tunnel T2E Permanent Lining: View from Northern Portal 36
  37. 37. St Helena Tunnel T2E Permanent Lining: 500 – 800 mm Cast in Situ Concrete 37
  38. 38. St Helena Tunnel T2E Permanent Lining Reinforcement (Not T2E) 38
  39. 39. St Helena Tunnel T2E Permanent Lining Formwork (Not T2E) 39
  40. 40. St Helena Tunnel T2E Final Lining: Completed Tunnel 40
  41. 41. St Helena Tunnel T2E Waterproofing
  42. 42. St Helena Tunnel T2E Lower Water Level Upper Water Level Tunnel Hydrogeology: Long Section, Northbound Tube 42
  43. 43. T2E St Helena Tunnel Spring Spring Feeding a Dam at the Northern Portal 43
  44. 44. T2E St Helena Tunnel Water Inflows during Excavation 44
  45. 45. T2E St Helena Tunnel Waterproofing: Waterproofing Membrane (not T2E) 45
  46. 46. T2E St Helena Tunnel Thank you for your attention. Any Questions? 46
  47. 47. T2E St Helena Tunnel
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