Guangzhou line3 ang
2
GUANGZHOU UNDERGROUND GUANGZHOU UNDERGROUND GUANGZHOU UNDERGROUND GUANGZHOU UNDERGROUND RAILWAY RAILWAY RAILWAY RAILWAY 2 EARTH PRESSURE BALANCED TBMs - Ø 6.28 m G STRUCTURE uangzhou, third largest city in China with 7 million inhabitants and which benefits economically of the proximity of Hong-Kong and of the special economical area of Shenzhen, decided to enlarge is metro with creating a new line (the 3 rd one). The work has begun in 2002 for a public opening of this new line in 2007. THE CONTRACTOR: Work carried out using the TBMs The 3 rd line will be of 34.7 km in tunnel with 17 stations. The 2 NFM Technologies / Wirth machines will drive 2 parallel tunnels of 1928 m in length. This part of the line will connect Hanxi and Shiqiao stations. Geology mainly consists of soft sands, sandy clay, chalk, silk as well as weathered rock. OVERALL PROJECT: Drilled length: 2 x 1,928 m Soils: soft sand, sandy clay, chalk, silt, weathered rock. Roofing: 6.5 m to 56 m Minimum radius of curvature: 300 m Maximum slope: 3% Overall inner diameter: 5.4 m Liner used for tunnel segments: Number/shape: 5 + 1 key joint Thickness: 300 mm Length: 1.5 m GUANGZHOU METRO 3th line bored with NFM Technologies' TBMs (MOR) Chinese Ministry of Railway, 14 th Bureau.
Transcript of Guangzhou line3 ang
GUANGZHOU UNDERGROUNDGUANGZHOU UNDERGROUNDGUANGZHOU UNDERGROUNDGUANGZHOU UNDERGROUND
RAILWAYRAILWAYRAILWAYRAILWAY
2 EARTH PRESSURE BALANCED TBMs - Ø 6.28 m
G
STRUCTURE
uangzhou, third largest city in China with 7 million inhabitants and which benefits economically of the proximity of Hong-Kong and of the special economical area of Shenzhen, decided to enlarge is metro with creating a new line (the 3rd
one). The work has begun in 2002 for a public opening of this new line in 2007.
THE CONTRACTOR:
Work carried out
using the TBMs
The 3rd line will be of 34.7 km in
tunnel with 17 stations. The 2
NFM Technologies / Wirth
machines will drive 2 parallel
tunnels of 1928 m in length.
This part of the line will connect
Hanxi and Shiqiao stations.
Geology mainly consists of soft
sands, sandy clay, chalk, silk as well as weathered rock.
OVERALL PROJECT:
Drilled length: 2 x 1,928 m
Soils: soft sand, sandy clay,
chalk, silt, weathered rock.
Roofing: 6.5 m to 56 m
Minimum radius of curvature: 300 m
Maximum slope: 3%
Overall inner diameter: 5.4 m
Liner used for tunnel segments:
Number/shape: 5 + 1 key joint
Thickness: 300 mm
Length: 1.5 m
GUANGZHOU METRO
3th line bored with
NFM Technologies' TBMs(MOR) Chinese Ministry of Railway,
14th Bureau.
THE TUNNELLING
MACHINES
• Type: EPB
• Cutting head: 6 arms
• Cutting tools: 110, variable overcuts 1 + 1
• Hydraulical powered
• Articulated shields
• Evacuation of spoil: screw conveyor and belt conveyor
• Erector: 6 degrees of freedom - stroke +/- 220 °
CHARACTERISTICS OF THE MACHINES
NFM TECHNOLOGIESTunnelling Machines Department: 90, rue Robert – 69456 LYON Cedex 06 - France
Phone: +33 426 848 752 - Fax +33 426 848 716 - E-mail: [email protected]
Website: www.nfm-technologies.com
GEOLOGICAL PROFILE
THE WORK SITE
• Excavation diameter: 6.28 m
• Head Type: soft ground or rock configuration
• Total length: 95 m
• Shield weight: 320 t
• Drive unit power: 945 kW
• Cutterhead drive unit: 6 hydraulic motors
• Head rotation speed: 3.75 rpm
• Maximal nominal torque: 7,340 kN.m
• Maximal breakout torque: 9,550 kN.m
• Total thrust: 36,100 kN
• Maximal speed of advance> 6 cm/min
• Articulation traction: 10,100 kN
• Installed power: 1,600 kVA
1st tube
2nd tube
Chorismite slightly weatheredChorismite
highly weathered Chorismite medium weathered
Plastic residual soilAlluvial silty
sand
Sandy clay
Silty clayChorismite completely weathered
