HDD Under Rail Tracks – 48-Hour Possession Analysis
Standard Parameters:
- Possession window: 48 hours
- Shift duration: 8 hours
- Teams per possession: 6 shifts
- Handback requirements: 2 hours
- Setup/demob: 4 hours total
- Effective working time: 42 hours
RAIL CROSSING EXAMPLES (48-HOUR POSSESSION)
| Location | Track Type | Length (m) | Diameter (mm) | Shifts Required | Depth (m) | Contractor | Cost ($K) | Source |
|---|---|---|---|---|---|---|---|---|
| Sydney | Main Line | 35 | 450 | 6 | 4.5 | UEA | 280 | TfNSW |
| Melbourne | Metro | 42 | 600 | 6 | 5.0 | John Holland | 320 | MTM |
| Brisbane | QR Lines | 38 | 500 | 6 | 4.8 | Downer | 290 | QR |
| Perth | Freight | 45 | 400 | 6 | 4.2 | McConnell Dowell | 270 | ARTC |
| Newcastle | Coal Line | 40 | 550 | 6 | 5.2 | UGL | 300 | ARTC |
48-HOUR POSSESSION BREAKDOWN:
Shift 1 (0-8hrs):
- Site establishment: 2hrs
- Setup drilling equipment: 4hrs
- Pilot bore start: 2hrs
- Progress: 8-10m
Shift 2 (8-16hrs):
- Continue pilot bore
- Progress: 15-20m
- Monitoring setup
- Survey checks
Shift 3 (16-24hrs):
- Complete pilot bore
- Start reaming
- Progress: 12-15m
- Continuous monitoring
Shift 4 (24-32hrs):
- Continue reaming
- Progress: 12-15m
- Prepare pullback
- Testing preparations
Shift 5 (32-40hrs):
- Complete reaming
- Start pullback
- Progress: 10-12m
- Quality checks
Shift 6 (40-48hrs):
- Complete pullback
- Testing: 2hrs
- Site cleanup: 2hrs
- Handback preparation: 2hrs
Production Rates Per 8-Hour Shift:
PILOT BORE:
- Setup: 4-6 hours (first shift)
- Drilling: 15-20m/shift
- Tracking: Continuous
- Fluid management: Ongoing
REAMING:
- Setup: 2-3 hours
- Progress: 12-15m/shift
- Fluid management: Critical
- Monitoring: Continuous
PULLBACK:
- Setup: 2-3 hours
- Progress: 10-12m/shift
- Testing: Continuous
- Documentation: Ongoing
Team Composition Per Shift:
- Supervisor: 1
- HDD Operators: 2
- Fluid technician: 1
- Surveyors: 2
- Track protection: 2
- Laborers: 2-3
Equipment Requirements:
- HDD Rig (appropriate size)
- Fluid recycling system
- Power generation
- Survey equipment
- Monitoring systems
- Emergency response
- Lighting systems
- Support vehicles
Critical Control Points:
- Pre-Possession:
- Track monitoring baseline
- Ground investigation
- Utility verification
- Emergency procedures
- During Possession:
- Settlement monitoring
- Fluid pressures
- Track movement
- Ground conditions
- Post-Possession:
- As-built survey
- Track geometry
- Installation testing
- Documentation
Note: All data based on:
- Standard possession window
- Normal ground conditions
- Adequate access
- Typical rail environment
- Standard monitoring
- Regular reporting
Other production rates – Indicative only
- RAIL INDUSTRY PRODUCTION RATES COMPREHENSIVE TABLE
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- HDD Under Rail Tracks – 48-Hour Possession Analysis
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Our Partners
- FR2 Infrastructure – Constructability advise and project and planning controls
- Staging Diagrams – Staging diagrams for possession planning
Possession Planning – Current Possession Calendars
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