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Revision of TUNNELLING - NATM from Thu, 2011-07-14 14:00

Posted Tue, 2009-07-14 04:52 by PP Admin

 Tunnel Advance Rates (m/day)

Tunnel In London Clay 
ID < 7.0 m2.5 - 3.0 m/day
ID 7.0 - 10.0 m1.5 - 2.5 m/day
ID > 10.0 m1.0 - 1.5 m/day
Tunnel In Woolwich & Reading Beds 
ID < 7.0 m1.5 - 2.0 m/day
ID 7.0 - 10.0 m1.5 m/day
ID > 10.0 m1.0 m/day
Inclined Tunnels 
ID < 7.0 m2.0 m/day
ID 7.0 - 10.0 m1.0 m/day
Vertical Shafts 
ID < 9.0 m1.5 m/day
ID 9.0 - 15.0 m1.0 m/day
Circulation Halls1 m of hall circumference/day.
Excavation Of Junctions1 junction in 6 days = 0.17 m/day
 Secondary Tunnel Lining Rates 
Tunnels 
ID < 6.5 m2.5 m/day
ID > 6.5 m2.0 m/day
Inclined Tunnels 
ID < 6.0 m2.0 m/day
ID > 6.0 m1.5 m/day
Vertical Shafts 
ID < 9.0 m2.0 m/day
ID > 9.0 m2.5 m/day
Circulation Halls 
ID 11.0 m2.0 m/day
Intermediate Landings 
With Columns2.0 m/day and individual tunnel
Without Columns2.0 m/day
Junctions1 junction in 4 days = 0.25 m/day

NATM Tunnels

Task / DescriptionSlow  Ave  Fast   Units
 Standard Advance Method, used on tunnels with max diameter-  7.0 -   m
 Half Face Advance Method, used on tunnels with max diameter-  10.0 -   m
 Double side Drift Advance Method, used on tunnels with diameter over-  10.0 -   m
 Double side Drift Advance Method, used on tunnels with diameter over-  10.0 -   m
 Excavation, London Clay, internal diameter under 7.0m2.5 2.9 3.2  m/day
 Excavation, London Clay, internal diameter 7.0-10.0m1.5 2.0 2.5  m/day
 Excavation, London Clay, internal diameter over 10.0m1.0 1.3 1.5  m/day
 Excavation, Woolwich/Reading Beds, internal diameter 2.0-7.0m1.5 1.8 2.0  m/day
 Excavation, Woolwich/Reading Beds, internal diameter 7.0-10.0m-  1.5 -   m/day
 Excavation, Woolwich/Reading Beds, internal diameter over 10.0m-  1.0 1.5  m/day
 Excavation, London Clay, Inclined Tunnels, diameter 2.0-7.0m1.5 2.0 3.2  m/day
 Excavation, London Clay, Inclined Tunnels, diameter 7.0-10.0m0.5 1.0 2.2  m/day
 Excavation, London Clay, Vertical Shafts, diameter 2.0-9.0m1.0 1.5 2.2  m/day
 Excavation, London Clay, Vertical Shafts, diameter 9.0-15.0m0.5 1.0 2.6  m/day
 Excavation, London Clay, Circulation Halls0.8 1.0 1.2  m of circumf/day
 Excavation, London Clay, Junction Excavation-  0.2 -   m/day
 Mucking Capacity, 1 access with 2 crews190.0 225.0 279.0  m3/day
 Mucking Capacity, 1 access with 4 crews255.0 300.0 366.0  m3/day
 Mucking Capacity, 2 access with 4 crews382.0 450.0 549.0  m3/day
 Sprayed Secondary Lining, Tunnels, diameter under 6.5m2.1 2.5 2.8  m/day
 Sprayed Secondary Lining, Tunnels, diameter over 6.5m1.5 2.0 2.4  m/day
 Sprayed Secondary Lining, Inclined Tunnels, diameter under 6.5m1.5 2.0 2.3  m/day
 Sprayed Secondary Lining, Inclined Tunnels, diameter over 6.5m1.0 1.5 1.9  m/day
 Sprayed Secondary Lining, Vertical Shafts, diameter under 6.5m1.8 2.0 2.5  m/day
 Sprayed Secondary Lining, Vertical Shafts, diameter over 6.5m2.2 2.5 3.1  m/day
 Sprayed Secondary Lining, Circulation Halls, diameter under 11.0m-  2.0 2.3  m/day
 Sprayed Secondary Lining, Intermediate Landing Tunnels with columns1.7 2.0 2.1  m/day
 Sprayed Secondary Lining, Intermediate Landing Tunnels without columns1.6 2.1 2.3  m/day
 Sprayed Secondary Lining, Tunnel Junctions-  0.2 0.3  m/day
 Insitu Permanent Lining, 12m bays, 350-400mm reinforced with PCV backing-  8.4 12.0  m/day
 Insitu Permanent Lining, extra over excavate/lining time to allow for permanent lining-  25.0 -   %
 Excavate and Line Cycle Time , Running Tunnels3.2 4.0 4.9  m/day
 Excavate and Line Cycle Time, Station Access Adits3.3 3.9 4.2  m/day
 Excavate and Line Cycle Time, Concourse Tunnels2.2 2.5 2.7  m/day
 Excavate and Line Cycle Time, Escalator Tunnels1.2 1.5 1.7  m/day

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