Under Line Crossing (ULX) installations require precise coordination of track possession, excavation, and service installation while maintaining track stability. Production rates vary significantly based on crossing width, depth, ground conditions, and installation methodology. Modern techniques including pipe jacking and horizontal directional drilling have improved efficiency, with some projects achieving installation rates of 3-4m per shift under optimal conditions.
Key Statistics:
- Average production: 2-3m/shift
- Typical depth: 1.8-2.5m
- Crossing width: 6-15m
- Crossing width per track: 4-5m
- Additional width per track: 3.5-4m
- Best practice completion: 1 crossing/weekend (2-3 tracks)
- Excavation volume: 30-50mÂł/crossing/track
- Jacking force: 50-200 tonnes
- Jacking force increase per track: 40-60 tonnes
- Installation accuracy: ±50mm
- Track monitoring: 24/7
- Track monitoring zones: 20m each side/trackAUSTRALIA REGION
| Location | Station | Width (m) | Method | Duration (hrs) | Rate (m/shift) | Contractor | Cost ($K) | Source |
|---|---|---|---|---|---|---|---|---|
| Sydney | Strathfield | 12 | Pipe Jack | 48 | 2.5-3.0 | John Holland | 380 | TfNSW |
| Melbourne | Sunshine | 9 | Open Cut | 72 | 1.5-2.0 | CPB | 420 | MTM |
| Brisbane | Northgate | 8 | HDD | 36 | 2.0-2.5 | Downer EDI | 290 | QR |
| Perth | Bayswater | 10 | Pipe Jack | 48 | 2.2-2.8 | McConnell Dowell | 350 | PTA |
| Sydney | Granville | 15 | Open Cut | 72 | 1.8-2.2 | Laing O’Rourke | 460 | Sydney Trains |
Installation Method Analysis:
Pipe Jacking:
- Setup Phase:
- Thrust pit: 8-10 hours
- Reception pit: 6-8 hours
- Track protection: 4-6 hours
- Equipment setup: 4-5 hours
- Installation Phase:
- Jacking rate: 0.5-1.0m/hour
- Steering checks: Every 1m
- Grouting: Continuous
- Settlement monitoring: Hourly
- Completion Phase:
- Service installation: 6-8 hours
- Testing: 4-6 hours
- Backfilling: 8-10 hours
- Track reinstatement: 4-6 hours
Note 1: Production rates are indicative only.
Note 2: Rates vary based on:
- Ground conditions
- Water table
- Track loading
- Access constraints
- Service requirements
- Possession windows
Note 3: Volume calculation formula:
V = (π × D² × L × SF)/4, where:
- V = Excavation volume
- D = Pipe diameter
- L = Crossing length
- SF = Swell factor (1.3-1.5)
Influencing Factors:
- Ground conditions
- Track stability
- Water ingress
- Existing services
- Access restrictions
- Weather impacts
- Material handling
- Safety requirements
AUSTRALIA REGION
| Location | Station | Width (m) | Tracks | Method | Duration (hrs) | Rate (m/shift) | Contractor | Cost ($K) | Source |
|---|---|---|---|---|---|---|---|---|---|
| Sydney | Strathfield | 12 | 3 | Pipe Jack | 48 | 2.5-3.0 | John Holland | 380 | TfNSW |
| Melbourne | Sunshine | 9 | 2 | Open Cut | 72 | 1.5-2.0 | CPB | 420 | MTM |
| Brisbane | Northgate | 8 | 2 | HDD | 36 | 2.0-2.5 | Downer EDI | 290 | QR |
| Perth | Bayswater | 14 | 4 | Pipe Jack | 56 | 2.2-2.8 | McConnell Dowell | 450 | PTA |
| Sydney | Granville | 15 | 4 | Open Cut | 72 | 1.8-2.2 | Laing O’Rourke | 460 | Sydney Trains |
INTERNATIONAL REGION
| Location | Station | Width (m) | Tracks | Method | Duration (hrs) | Rate (m/shift) | Contractor | Cost ($K) | Source |
|---|---|---|---|---|---|---|---|---|---|
| UK-London | Liverpool St | 18 | 5 | Pipe Jack | 96 | 1.8-2.2 | Balfour Beatty | 580 | Network Rail |
| Germany | Frankfurt Hbf | 16 | 4 | HDD | 72 | 2.2-2.6 | Hochtief | 520 | DB |
| Japan | Tokyo | 20 | 6 | Pipe Jack | 108 | 1.5-2.0 | Kajima | 650 | JR East |
| France | Paris Nord | 15 | 4 | Open Cut | 84 | 1.6-2.0 | Vinci | 490 | SNCF |
| Hong Kong | Kowloon | 22 | 6 | Pipe Jack | 120 | 1.4-1.8 | Gammon | 680 | MTR |
Production Rate Analysis by Track Number:
2 Tracks:
- Setup time: 8-10 hours
- Installation: 1.5-2.0m/shift
- Completion: 6-8 hours
- Total duration: 36-48 hours
3 Tracks:
- Setup time: 10-12 hours
- Installation: 1.2-1.8m/shift
- Completion: 8-10 hours
- Total duration: 48-60 hours
4+ Tracks:
- Setup time: 12-16 hours
- Installation: 1.0-1.5m/shift
- Completion: 10-14 hours
- Total duration: 72-96 hours
Note 1: Production rates are indicative only.
Note 2: Rates vary based on:
- Number of tracks
- Track spacing
- Track criticality
- Service complexity
- Ground conditions
- Access constraints
Note 3: Volume calculation formula:
V = (π × D² × L × SF × TF)/4, where:
- V = Excavation volume
- D = Pipe diameter
- L = Crossing length
- SF = Swell factor (1.3-1.5)
- TF = Track factor (1.0 per track)
Additional Considerations:
- Track protection requirements increase with track numbers
- Monitoring zones overlap with multiple tracks
- Settlement tolerances more critical with multiple tracks
- Possession planning complexity increases
- Risk profile increases with track numbers
- Equipment access more challenging
- Material logistics more complex
- Longer possession windows required
Other production rates – Indicative only
- RAIL INDUSTRY PRODUCTION RATES COMPREHENSIVE TABLE
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Our Partners
- FR2 Infrastructure –Â Constructability advise and project and planning controls
- Staging Diagrams – Staging diagrams for possession planning
Possession Planning – Current Possession Calendars
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