INTERNATIONAL SEMINAR ON MASS RAPID TRANSIT SYSTEM(MRTS) 4th‐5 th November 2014 REVIEW AND ASSESSMENT OF CHALLENGES REVIEW AND ASSESSMENT OF CHALLENGES G CO S C O O C A G CO S C O O C A DURING CONSTRUCTION OF CHENNAI DURING CONSTRUCTION OF CHENNAI METRO METRO
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Technical Paper on Chennai Metro Project (Mr Klaus Muenz and Nandan Kumar)
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INTERNATIONAL SEMINAR ON
MASS RAPID TRANSIT SYSTEM(MRTS)( )4th‐5th November 2014
REVIEW AND ASSESSMENT OF CHALLENGES REVIEW AND ASSESSMENT OF CHALLENGES G CO S C O O C A G CO S C O O C A DURING CONSTRUCTION OF CHENNAI DURING CONSTRUCTION OF CHENNAI
Typical Rock Soil Profile Typical Rock Soil Profile ‐‐ Packages 01Packages 01
Soil ProfileSoil Profile‐‐Mannadi StationMannadi Station
Project UAA 01
Soil ProfileSoil Profile‐‐ Chennai Central StationChennai Central Station
Project UAA 01
Core DetailsCore Details
Surface Constraints
Saint Andrew’s ChurchSHIFTING OF MONUMENT AT RIPPON
BUILDING AREA
High Court Mannadi
Surface Constraint Chennai Central
SHC Shaft
Surface Constraint Chennai Central
Surface Constraint ‐Egmore
Surface Constraint - Railway tracks on the stretch High Court –Chennai Central and geological Profile
Surface Constrain - Railway tracks on the stretch Chennai Central ‐Mayday Park Tunnel
View of Locomotive ‐Mayday ParkView of Locomotive Mayday Park
Tunnelling beneath Coovam River
Under Coovam River
100%
TYPICAL GEOLOGICAL PROFILE VARIATION
60%
80%
100%
age
W1 W2 W3 W4Expected
20%
40%
Perce
nt
0%
4842
.0133
4847
4862
.9
4880
4891
4903
4910.4
4915
4923
4934
4940
4951
4956
4967
4977
4992
Chainage
60%
80%
100%
entage
Actual Profile
0%
20%
40%
3 7 9 0 1 3 4 5 3 4 0 1 6 7 7 2
Perce
4842
.0133
4847
4862
.9
4880
4891
4903
4910.4
4915
4923
4934
4940
4951
4956
4967
4977
4992
Chainage W1‐Fresh Rock W2‐Slightly weathered Rock
W3‐M Weathered RockW4‐ Highly Weathered Rock
Geological Variation Results:Cutter Consumption & Frequency of Intervention
TBM retrieval in wet condition
CHENNAI CENTRAL (Overlapping of Two Corridor)(Overlapping of Two Corridor)
Retrieval Shaft at SCC ‐Mayday Park Tunnel
Obstacles during Tunnel OperationObstacles during Tunnel Operation
Ground Level
CL
Red Zone O
raZon
Gr
Zone
L
TUNNEL A
ange ne
reen ZoneGreen Z
Orang
e Zo
ne
TUNNEL BA B
1.0 mt 1.0 mt
Bore well influence 1mt from Extrados of TunnelBore well influence 1mt from Extrados of TunnelBore well influence 1mt from Extrados of Tunnel Bore well influence 1mt from Extrados of Tunnel SegmentSegment
Obstacles during Tunnel OperationObstacles during Tunnel Operation
UAA 01
NO. OF EXISTING WELLS IN DIFFERENT ZONES: UAA01
UAA 01
Project
RED ZONE (11.355 m. f T l
ORANGE ZONE (5.15 m. from RED
GREEN ZONE ( 4.5 m. from
TOTAL R + O + G
Projectfrom Tunnel
CL)
(5. 5 m. from RZONE)
( 4.5 m. fromORANGE ZONE)
G
Package 01 304 98 90 492g
Package 0561 24 60 145
Total 365 122 150 637Total 365 122 150 637
BUILDING CONDITION SURVEY
BUILDING CONDITION SURVEY
TUNNELLING PERFORMANCETUNNELLING PERFORMANCEThe TBMS are normally operated on a 24 hr basis, working 2 shifts per day.p yThe following main results have been achieved:
Average Daily Production:.12 ..Rings =16.8 mBest Day(09/02/2013): 39rings=54 6 mBest Day(09/02/2013): 39rings=54.6 mBest week(04/02/2013 to 09/02/2013): 139 rings=182 mBest Month ( Oct 2013): 525 rings= 735 m
We have achieved 39 Rings Boring in a day first time in the World
Considering that all the 5 TBMs have been operated in a very sensitive urban environment, almost always in closed mode, these results can be regarded as very positive and above the usual standard.