10. Segmental Lining Design – Lining Geometry Key block design Principle issues: a) Limiting obliqueness of angle (as surface becomes twisted) b) Ensuring can be inserted by TBM segment erector
11. Segmental Lining Design – Lining Geometry Key block design Principle issues: a) Limiting obliqueness of angle (as surface becomes twisted) b) Ensuring can be inserted by TBM segment erector
23. Segmental Lining Design – Calculation of Internal Forces Grouting loads (annulus and secondary grouting): Assessment: a) Determine grout for Annulus Primary and Secondary Grouting; b) Check using Muir-Wood (1976) – Stage 1 will give Big Thrust, Zero Moment, Stage 2 will give Small Thrust, Large Moment
24.
25. Segmental Lining Design – Calculation of Internal Forces TBM propulsion jacking loads: Assessed using Guyon (1972)
26. Segmental Lining Design – Calculation of Internal Forces Seismic Design – Use method of Wang (1991) Assess impact of: a) Axial deformation along tunnel b) Curvature deformation along tunnel c) Ovaling of tunnel profile Normally, no special joints are required, more reinforcement may be needed.
30. Segmental Lining Design – Calculation of Internal Forces Reinforcement Design Design of reinforcing quantity and layout needs to accommodate: a) Design loading; b) Distribution to limit crack widths and cover for durability; c) Limit damage (accidental or under loading) around bolt pockets, lifting socket, segment corners, etc).
33. Bolt Design Design principles: Bolts are intended to: a) Aid ring build quality b) Compress gaskets c) Provide safety prior to annulus grout hardening Bolts can be curved or straight (steel or plastics). Bolts and washer assemblies do not need waterproofing
34. Segment Manufacture Documentation required: a) Segment design drawings; b) Segment mould shop drawings; c) Specification on casting, concrete mix, steel fixing, etc. d) Tolerances for mould, steel fixing, etc.
35. Waterproofing Design Main waterproofing elements: a) Gaskets on all joints with hydrophilic inserts in gaskets b) Use of hydrophilic strips c) Provision of caulking groove Soil side Drive direction
37. TBM Introduction Type of TBM ( (According AFTES Association) Ground support Main TBM Types None Beam TBM Road Header With Shied Support only Open Shield Machine With Shield and Front support Earth pressure balance Machine Slurry Machine Compressed air shield
38. TBM with no shield and frontal support Main Beam and Reamer Beam Machine Road Header
39. TBM with open shield Double Shield TBM Single Shield TBM
40. Closed Shield TBM – Slurry Machine Confinement is achieved by pressurizing boring fluid inside the cutterhead chamber
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43. Closed Shield TBM – EPBM Shield Tail skin Mucking and support functions trailing Ring building and annulus grouting Propulsion / steerage Excavation Active pre-cast concrete tunnel lining support
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45. TBM OPERATION – Erecting for launch Launching shaft prepared Lower part of shield, bulkhead and drive rams Installing main drive
46. TBM OPERATION – Erecting for launch Upper shield and drive rams Lower part of tail-skin Ring erector installed Cutter-head installed
47. TBM OPERATION – Erecting Al Bugeisha for launch Completed shield and tail-skin Prepared launching eye with seals
48. TBM OPERATION – Segmental tunnel lining Stack of 3 test rings Ring placed in TBM tail skin Ground is not exposed Segment casting Soil Annulus grout Key block
49. PORE WATER PRESSURE IN SCREW Soil conditioning improves hydraulic gradient in screw TBM OPERATION – Application of EPB face pressure h o h 1 Ratio of h 1 /h o is linearly proportional to achievable effective face pressure h 2 Second screw is a risk mitigation measure Soil conditioning = higher effective face pressure
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53. TBM Selection – Face stability Yoshikowa et al (1980) Requires measures to maintain slurry pressure Slurry TBM requires heavy de-siltation facilities Slurry requires secondary separation treatment High risk of blockages particularly when N>15 APPLICABILITY OF SLURRY TBM FOR COMPARISON
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
NOTES: This slide illustrates the main portions of the EPB TBM and activities that are undertaken. Key feature is ring building within the protection of the tail-skin.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
NOTES: No added comment
NOTES: No added comment
NOTES: This slide illustrates the launching seal that pressures onto the shield skin, permitting early pressurising of the cutterhead with grout/backfill or other materials.
NOTES: This slide illustrates how the permanent, one-pass placement, segmental lining is placed within the protection of the tail-skin and continuous annulus grouting maintains bedding of the ring and limits ground movements.
NOTES: This slide illustrates the mechanism of the screw in applying face pressure and the importance of pore water pressure control.
NOTES: This slide illustrates steering mechanisms and survey control measures to limit risk of mis-alignment.
NOTES: This slide illustrates the importance of monitoring actual spoil quantity compared to assumed quantities to limit risk of over-excavation and subsequent settlement/subsidence risk.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
The first part of the presentation will describe the Earth Pressure Balance TBM used for excavating the Tsing Tsuen Tunnels. Initially I will give a brief introduction to the West Rail Project which will serve as an introduction for both parts of my presentation. I’m aware many of you will be very familiar with this project so I will try to keep this brief. Then I will focus on the Tsing Tsuen Tunnels and will describe the: Site conditions; TBM used; Segmental Linings Installed; TBM Performance; Tunnelling Challenges Tunnellling Success I will close this first presentation by drawing some conclusions.
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