Utilities Relocation in Railway Environments Analysis

Utility relocation in railway environments involves complex coordination of multiple service authorities, staged works, and maintenance of existing services. Production rates vary significantly based on utility type, depth, accessibility, and interface requirements. Modern techniques including trenchless technology and service detection systems have improved efficiency, with some projects achieving relocation rates of up to 50 meters per day under optimal conditions.

Key Statistics:

  • Average production: 20-30m/day
  • Typical depth: 0.6-3.0m
  • Service corridors: 2-5m width
  • Best practice completion: 40m/day
  • Excavation volume: 15-25mÂł/day
  • Service detection accuracy: ±0.3m
  • Minimum clearances: 0.5-1.0m
  • Protection requirements: 100%

AUSTRALIA REGION

Location Station Length (m) Service Type Depth (m) Rate (m/day) Duration (weeks) Contractor Cost ($M) Source
Sydney Central 450 HV/Water/Comms 1.2-2.5 25-30 16 John Holland 4.8 TfNSW
Melbourne Metro 380 Gas/LV/Water 0.9-1.8 20-25 14 CPB 3.6 MTM
Brisbane Cross River 320 Water/Comms 1.5-2.2 22-28 12 Downer EDI 2.9 QR
Perth Forrestfield 280 HV/Gas/Water 1.8-2.8 18-24 10 Laing O’Rourke 2.4 PTA
Sydney Waterloo 350 All Services 1.0-3.0 15-20 18 CIMIC 3.8 Sydney Metro

Service Type Analysis:

High Voltage Electrical:

  1. Production Rates:
  • Open trench: 15-20m/day
  • Joint bays: 1-2 days each
  • Cable pulling: 200-300m/day
  • Testing: 2-3 days/section

Water Mains:

  1. Production Rates:
  • Open trench: 25-30m/day
  • Connections: 1-2 days each
  • Testing: 1 day/100m
  • Commissioning: 2-3 days/section

Gas Mains:

  1. Production Rates:
  • Open trench: 20-25m/day
  • Welding: 10-12 joints/day
  • Testing: 2 days/section
  • Commissioning: 3-4 days/section

Communications:

  1. Production Rates:
  • Open trench: 30-35m/day
  • Joint pits: 1 day each
  • Cable pulling: 300-400m/day
  • Testing: 1-2 days/section

Note 1: Production rates are indicative only.

Note 2: Rates vary based on:

  • Service type
  • Ground conditions
  • Access constraints
  • Interface requirements
  • Authority requirements
  • Weather conditions

Note 3: Volume calculation formula:
V = (L Ă— W Ă— D Ă— SF Ă— CF), where:

  • V = Excavation volume
  • L = Trench length
  • W = Trench width
  • D = Depth
  • SF = Swell factor (1.3-1.5)
  • CF = Complexity factor (1.2-1.8)

Influencing Factors:

  • Service authority requirements
  • Railway protection requirements
  • Existing service conflicts
  • Ground conditions
  • Access restrictions
  • Weather impacts
  • Traffic management
  • Safety requirements

 


Other production rates – Indicative only

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