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Production RatesTunneling MiningTunneling NATM

Tunneling NATM

Planning and Estimating Production Rates

Advance Methods
Task / DescriptionSlowAveFast
Standard Advance Method, used on tunnels with max diameter-7.0 m - 22.97 ft-
Half Face Advance Method, used on tunnels with max diameter-10.0 m - 32.81 ft-
Double side Drift Advance Method, used on tunnels with diameter over-10.0 m - 32.81 ft-
Double side Drift Advance Method, used on tunnels with diameter over-10.0 m - 32.81 ft-
Excavation – London Clay
Task / DescriptionSlowAveFast
Internal diameter under 7.0m2.5 m/day - 8.20 ft/day2.9 m/day - 9.51 ft/day3.2 m/day - 10.50 ft/day
Internal diameter 7.0–10.0m1.5 m/day - 4.92 ft/day2.0 m/day - 6.56 ft/day2.5 m/day - 8.20 ft/day
Internal diameter over 10.0m1.0 m/day - 3.28 ft/day1.3 m/day - 4.27 ft/day1.5 m/day - 4.92 ft/day
Excavation – Woolwich/Reading Beds
Task / DescriptionSlowAveFast
Internal diameter 2.0–7.0m1.5 m/day - 4.92 ft/day1.8 m/day - 5.91 ft/day2.0 m/day - 6.56 ft/day
Internal diameter 7.0–10.0m-1.5 m/day - 4.92 ft/day-
Internal diameter over 10.0m-1.0 m/day - 3.28 ft/day1.5 m/day - 4.92 ft/day
Excavation – London Clay (Inclined Tunnels)
Task / DescriptionSlowAveFast
Diameter 2.0–7.0m1.5 m/day - 4.92 ft/day2.0 m/day - 6.56 ft/day3.2 m/day - 10.50 ft/day
Diameter 7.0–10.0m0.5 m/day - 1.64 ft/day1.0 m/day - 3.28 ft/day2.2 m/day - 7.22 ft/day
Excavation – London Clay (Vertical Shafts)
Task / DescriptionSlowAveFast
Diameter 2.0–9.0m1.0 m/day - 3.28 ft/day1.5 m/day - 4.92 ft/day2.2 m/day - 7.22 ft/day
Diameter 9.0–15.0m0.5 m/day - 1.64 ft/day1.0 m/day - 3.28 ft/day2.6 m/day - 8.53 ft/day
Excavation – Circulation Halls & Junctions
Task / DescriptionSlowAveFast
Circulation Halls0.8 m circumf/day - 2.62 ft circumf/day1.0 m circumf/day - 3.28 ft circumf/day1.2 m circumf/day - 3.94 ft circumf/day
Junction Excavation-0.2 m/day - 0.66 ft/day-
Mucking Capacity
Task / DescriptionSlowAveFast
1 access, 2 crews190.0 m³/day - 248.56 yd³/day225.0 m³/day - 294.90 yd³/day279.0 m³/day - 365.04 yd³/day
1 access, 4 crews255.0 m³/day - 333.58 yd³/day300.0 m³/day - 392.40 yd³/day366.0 m³/day - 478.71 yd³/day
2 access, 4 crews382.0 m³/day - 499.69 yd³/day450.0 m³/day - 588.60 yd³/day549.0 m³/day - 718.06 yd³/day
Sprayed Secondary Lining – Tunnels
Task / DescriptionSlowAveFast
Diameter under 6.5m2.1 m/day - 6.89 ft/day2.5 m/day - 8.20 ft/day2.8 m/day - 9.19 ft/day
Diameter over 6.5m1.5 m/day - 4.92 ft/day2.0 m/day - 6.56 ft/day2.4 m/day - 7.87 ft/day
Sprayed Secondary Lining – Inclined Tunnels
Task / DescriptionSlowAveFast
Diameter under 6.5m1.5 m/day - 4.92 ft/day2.0 m/day - 6.56 ft/day2.3 m/day - 7.55 ft/day
Diameter over 6.5m1.0 m/day - 3.28 ft/day1.5 m/day - 4.92 ft/day1.9 m/day - 6.23 ft/day
Sprayed Secondary Lining – Vertical Shafts
Task / DescriptionSlowAveFast
Diameter under 6.5m1.8 m/day - 5.91 ft/day2.0 m/day - 6.56 ft/day2.5 m/day - 8.20 ft/day
Diameter over 6.5m2.2 m/day - 7.22 ft/day2.5 m/day - 8.20 ft/day3.1 m/day - 10.17 ft/day
Sprayed Secondary Lining – Special Areas
Task / DescriptionSlowAveFast
Circulation Halls under 11.0m-2.0 m/day - 6.56 ft/day2.3 m/day - 7.55 ft/day
Intermediate Landing Tunnels with columns1.7 m/day - 5.58 ft/day2.0 m/day - 6.56 ft/day2.1 m/day - 6.89 ft/day
Intermediate Landing Tunnels without columns1.6 m/day - 5.25 ft/day2.1 m/day - 6.89 ft/day2.3 m/day - 7.55 ft/day
Tunnel Junctions-0.2 m/day - 0.66 ft/day0.3 m/day - 0.98 ft/day
Insitu Permanent Lining
Task / DescriptionSlowAveFast
12m bays, 350–400mm reinforced with PCV backing-8.4 m/day - 27.56 ft/day12.0 m/day - 39.37 ft/day
Extra over for permanent lining-25.0 %-
Cycle Times
Task / DescriptionSlowAveFast
Running Tunnels3.2 m/day - 10.50 ft/day4.0 m/day - 13.12 ft/day4.9 m/day - 16.08 ft/day
Station Access Adits3.3 m/day - 10.83 ft/day3.9 m/day - 12.80 ft/day4.2 m/day - 13.78 ft/day
Concourse Tunnels2.2 m/day - 7.22 ft/day2.5 m/day - 8.20 ft/day2.7 m/day - 8.86 ft/day
Escalator Tunnels1.2 m/day - 3.94 ft/day1.5 m/day - 4.92 ft/day1.7 m/day - 5.58 ft/day
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Tunnel boring and pipe jackingProduction Rates / Man-hours