1305-TT –Myanmar –
Pipe Roof Construction in Singapore
Trisha Sun
Trenchless Technology Seminar
-Myanmar 5 to 7 June 2013
...
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25/10/2012
1
PIPE Roof
• Exepereince in Singapore –
Pipe roof costruction
•Sun , email: wnmconsultants@gmail.com
1Pipe Roo...
25/10/2012
2
Tpoics-2-2
• Jacking and receiving shafts
•Jacking ,mining
•Monitoring
•Risk
•Tender- design
•and documentati...
25/10/2012
3
Various shapes
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 5
Construction Sequence
1. Execution of sheet ...
25/10/2012
4
pipe roof Plan view (1-2)
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 7
Pipe roof -Plan view(2-2)
IEM Con...
25/10/2012
5
Pipe roof
SG ,Pipe roof Tunnel
•Long section view
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 9
• Design ...
25/10/2012
6
Design Issues- 1
•Physical site constraints
Close to MRT CCL-central
circular Line
Close to Viaduct foundatio...
25/10/2012
7
Design Issues- 3
critical issues
IEM Conf Mar 2011- Pipe Roof Singapore-Sun,
OKP
13
Design Issues -4-
geologi...
25/10/2012
8
Design 5-
during break out-soil treatment, steel
portal frame
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP...
25/10/2012
9
Design 7 -stage excavation
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 17
Design 8 -Face Stability
IEM Co...
25/10/2012
10
Design 9 -Design Model
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 19
Adopted Solution 1-3
The pipe jack...
25/10/2012
11
Adopted Solution 2-3
The pipe roof (see below Sketch
)comprises rows of 780mm dia Steel pipes
(10 on top and...
25/10/2012
12
SKETCH – CONFIGURATION OF THE PIPE
ROOF -drilling sequence
23IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP...
25/10/2012
13
Machine 2-2 -Layout
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP
25
PIPE JAKCING PROCESS -
Problems- jack...
25/10/2012
14
•Construction process
27IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP
Construction process 1-
Jacking shaf...
25/10/2012
15
Construction process 2
Construction of Jacking & Receiving Shaft
29IEM Conf Mar 2011- Pipe Roof Singapore-Su...
25/10/2012
16
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 31
Construction process 8
Steel pipes
Construction process 9...
25/10/2012
17
Construction process 14
Pipe Jacking in Progress
33-
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP
IEM Con...
25/10/2012
18
Construction process 19
TBM Through at Receiving Shaft
35
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP
Co...
25/10/2012
19
Construction process 22
Completed pipe roof
IEM Conf Mar 2011- Pipe Roof Singapore-Sun,
OKP
37
•Mining of Tu...
25/10/2012
20
Construction –Mining of tunnel 3 -
Installing portal frame at jacking shaft
IEM Conf Mar 2011- Pipe Roof Sin...
25/10/2012
21
Construction –Mining of tunnel 6
install entrance frame before
mining
IEM Conf Mar 2011- Pipe Roof Singapore...
25/10/2012
22
•Monitoring
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, 43
Monitoring 1-
Services –need for monitoring
IEM C...
25/10/2012
23
Monitoring 3 A
Sample-installations of
instrumentations
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 45
M...
25/10/2012
24
Instrumentation – Monitoring 4
INSTALL PRISM INSIDE THE STEEL PIPE –for
monitoring settlements
IEM Conf Mar ...
25/10/2012
25
Monitoring 5B
MRT-FIXING PRISMS
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 49
Monitoring 6
- Prediction...
25/10/2012
26
Monitoring 7
Readings
IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP
51
• Completion
52IEM Conf Mar 2011- P...
25/10/2012
27
Completion
Final stage
IEM Conf Mar 2011- Pipe Roof Singapore-Sun,
OKP cheng
53
• Risk Assessment
IEM Conf M...
25/10/2012
28
Risk Assessment
Risk factors (1)
•Risk from Soil information, services
•Settlement control and damages
•Insu...
25/10/2012
29
Preparing for contract
•Contract documentation
•Design/drawings
•Specifications
•Bills /Lump sum/VO
IEM Conf...
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F1 1103-pipe roof singapore sun -all ,38 pg

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Construction of Pipe Roof and Support System in Proposed Outlet Drain Undercrossing North Buona Vista Road, Singapore

T Sun, W& M Consultants, Singapore. wnmconsultants@gmail.com
Land Transport Authority, Singapore , Public Utilities Board, Singapore, Or Kim Peow Contractors (Pte) Ltd, Singapore


Abstract: The project in the paper included design and construction of a permanent 120m long RC box culvert and sewer diversion at North Buona Vista Road (NBV) Singapore. The pipe roof method was selected by the design and build contractor in fulfilment of the contract requirement for the 53 m box section undercrossing NBV Road. The adopted methodology comprised the installation by pipe jacking of numbers of interlocking steel pipes followed by traverse series of steel frames for safe mining of the tunnel. This served to maintain uninterrupted service conditions for the road, subways tunnel and other services. There are many challenges in the construction of pipe roof and mined tunnel. This paper deals with the consideration in the design and construction of such works. It also highlighted the problems encountered during the construction, subsequent solution adopted and protection of existing utilities as well as monitoring of settlement of the surrounding areas of the project.

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F1 1103-pipe roof singapore sun -all ,38 pg

  1. 1. 1305-TT –Myanmar – Pipe Roof Construction in Singapore Trisha Sun Trenchless Technology Seminar -Myanmar 5 to 7 June 2013 Pipe Roof Construction in Singapore Trisha Sun Principal W& M Consutlants wnmconsultants@gmail.com 1 of 38. 1 of 38. -Pipe Roof In Singapore-Sun
  2. 2. 2 of 38. 2 of 38. -Pipe Roof In Singapore-Sun
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  4. 4. 4 of 38. 4 of 38. -Pipe Roof In Singapore-Sun
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  6. 6. 6 of 38. 6 of 38. -Pipe Roof In Singapore-Sun
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  8. 8. 8 of 38. 8 of 38. -Pipe Roof In Singapore-Sun
  9. 9. 9 of 38. 9 of 38. -Pipe Roof In Singapore-Sun
  10. 10. 25/10/2012 1 PIPE Roof • Exepereince in Singapore – Pipe roof costruction •Sun , email: wnmconsultants@gmail.com 1Pipe Roof Singapore-Sun, OKP Topics 1-2 •Introduction •Pipe roof concept •Design issues •Machine and problems •Problems of jacking •Constrction process 2Pipe Roof Singapore- Sun 10 of 38. 10 of 38. -Pipe Roof In Singapore-Sun
  11. 11. 25/10/2012 2 Tpoics-2-2 • Jacking and receiving shafts •Jacking ,mining •Monitoring •Risk •Tender- design •and documentations Pipe Roof Singapore- Sun 3 Introduction •Trenchless Methods for providing “No dig “ solution to installation of large culverts/pipes •Alternatives: •Pipe ramming / pipe roof by ramming/auger machine •Pipe roof by microtunnelling •Pipe pushing/box culvert direct jacking •Open cut IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 4 11 of 38. 11 of 38. -Pipe Roof In Singapore-Sun
  12. 12. 25/10/2012 3 Various shapes IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 5 Construction Sequence 1. Execution of sheet piles 2. Execution of the pipe arch microtunnelling 3. Mined excavation of tunnel with steel ribs with reinforced shotcrete & fibre glass elements 4. Casting of permanent concrete lining Pipe Arch Tunnel – Concept Site picture of project by Metropolitan Atlanta Rapid Transit Authority in USA 6 IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKPIEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKPIEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKPIEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 12 of 38. 12 of 38. -Pipe Roof In Singapore-Sun
  13. 13. 25/10/2012 4 pipe roof Plan view (1-2) IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 7 Pipe roof -Plan view(2-2) IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 8 13 of 38. 13 of 38. -Pipe Roof In Singapore-Sun
  14. 14. 25/10/2012 5 Pipe roof SG ,Pipe roof Tunnel •Long section view IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 9 • Design Issues 10IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 14 of 38. 14 of 38. -Pipe Roof In Singapore-Sun
  15. 15. 25/10/2012 6 Design Issues- 1 •Physical site constraints Close to MRT CCL-central circular Line Close to Viaduct foundation E west line ,Sewer line ,services IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 11 Design Issues -2 Physical site constraints-mining below joint bay cables IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 12 15 of 38. 15 of 38. -Pipe Roof In Singapore-Sun
  16. 16. 25/10/2012 7 Design Issues- 3 critical issues IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 13 Design Issues -4- geological profile IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 14 16 of 38. 16 of 38. -Pipe Roof In Singapore-Sun
  17. 17. 25/10/2012 8 Design 5- during break out-soil treatment, steel portal frame IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 15 Design 6- during break through at exit -soil treatment( soft alluvial), steel portal frame IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 16 17 of 38. 17 of 38. -Pipe Roof In Singapore-Sun
  18. 18. 25/10/2012 9 Design 7 -stage excavation IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 17 Design 8 -Face Stability IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 18 18 of 38. 18 of 38. -Pipe Roof In Singapore-Sun
  19. 19. 25/10/2012 10 Design 9 -Design Model IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 19 Adopted Solution 1-3 The pipe jacking method adopted -jacking from one end (jacking Shaft) to the other end(receiving shaft) using steel pipes to form a horizontal and vertical temporary structure ( around the proposed reinforced box culvert.) • 20IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 19 of 38. 19 of 38. -Pipe Roof In Singapore-Sun
  20. 20. 25/10/2012 11 Adopted Solution 2-3 The pipe roof (see below Sketch )comprises rows of 780mm dia Steel pipes (10 on top and bottom and 6 rows on each sides to form the vertical wall. Each row of the steel pipes -interlock together using steel T- clutches prefabricated together with the pipes. IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP -22 Adopted Solution 2-3 Each row of the pipe which is approximately 54m is formed by welding together 9 to 10 number ( 6 m long ) of steel pipe using the full butt penetration welds IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 22 20 of 38. 20 of 38. -Pipe Roof In Singapore-Sun
  21. 21. 25/10/2012 12 SKETCH – CONFIGURATION OF THE PIPE ROOF -drilling sequence 23IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP •Machine and problems IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 24 21 of 38. 21 of 38. -Pipe Roof In Singapore-Sun
  22. 22. 25/10/2012 13 Machine 2-2 -Layout IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 25 PIPE JAKCING PROCESS - Problems- jacking •Obstruction •Alignment •Clutch •Soil information •Settlement IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 26 22 of 38. 22 of 38. -Pipe Roof In Singapore-Sun
  23. 23. 25/10/2012 14 •Construction process 27IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP Construction process 1- Jacking shaft –typical IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 28 23 of 38. 23 of 38. -Pipe Roof In Singapore-Sun
  24. 24. 25/10/2012 15 Construction process 2 Construction of Jacking & Receiving Shaft 29IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP Construction 7 Setting of Jacks 30IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 24 of 38. 24 of 38. -Pipe Roof In Singapore-Sun
  25. 25. 25/10/2012 16 IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 31 Construction process 8 Steel pipes Construction process 9 Sample clutch details IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 32 25 of 38. 25 of 38. -Pipe Roof In Singapore-Sun
  26. 26. 25/10/2012 17 Construction process 14 Pipe Jacking in Progress 33- IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP Construction process 16 Ultrasonic Test to welded joint 34-IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 26 of 38. 26 of 38. -Pipe Roof In Singapore-Sun
  27. 27. 25/10/2012 18 Construction process 19 TBM Through at Receiving Shaft 35 IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP Construction process 21 Completed Horizontal Row of Pipe Roof 36IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 27 of 38. 27 of 38. -Pipe Roof In Singapore-Sun
  28. 28. 25/10/2012 19 Construction process 22 Completed pipe roof IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 37 •Mining of Tunnel India No Dig-Dec 9,2010 - Pipe Roof , cheng 38 28 of 38. 28 of 38. -Pipe Roof In Singapore-Sun
  29. 29. 25/10/2012 20 Construction –Mining of tunnel 3 - Installing portal frame at jacking shaft IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 39 Construction –Mining of tunnel 4 Installing portal frame at jacking shaft India No Dig-Dec 9,2010 - Pipe Roof , cheng 40 29 of 38. 29 of 38. -Pipe Roof In Singapore-Sun
  30. 30. 25/10/2012 21 Construction –Mining of tunnel 6 install entrance frame before mining IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 41 Construction –Mining of tunnel 8A EXCAVATON IEM Conf Mar 2011- Pipe Roof Singapore-Sun, 42 30 of 38. 30 of 38. -Pipe Roof In Singapore-Sun
  31. 31. 25/10/2012 22 •Monitoring IEM Conf Mar 2011- Pipe Roof Singapore-Sun, 43 Monitoring 1- Services –need for monitoring IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 44 31 of 38. 31 of 38. -Pipe Roof In Singapore-Sun
  32. 32. 25/10/2012 23 Monitoring 3 A Sample-installations of instrumentations IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 45 Monitoring 3 B Installations of instrumentations –Joint Bay IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 46 32 of 38. 32 of 38. -Pipe Roof In Singapore-Sun
  33. 33. 25/10/2012 24 Instrumentation – Monitoring 4 INSTALL PRISM INSIDE THE STEEL PIPE –for monitoring settlements IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 47 Monitoring 5 A MRT Line below project IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 48 33 of 38. 33 of 38. -Pipe Roof In Singapore-Sun
  34. 34. 25/10/2012 25 Monitoring 5B MRT-FIXING PRISMS IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 49 Monitoring 6 - Predictions IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 50 34 of 38. 34 of 38. -Pipe Roof In Singapore-Sun
  35. 35. 25/10/2012 26 Monitoring 7 Readings IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 51 • Completion 52IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 35 of 38. 35 of 38. -Pipe Roof In Singapore-Sun
  36. 36. 25/10/2012 27 Completion Final stage IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP cheng 53 • Risk Assessment IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 54 36 of 38. 36 of 38. -Pipe Roof In Singapore-Sun
  37. 37. 25/10/2012 28 Risk Assessment Risk factors (1) •Risk from Soil information, services •Settlement control and damages •Insurance cover on adjacent structures •Pre con survey •Sharing of risks •Design and build contract •Allowance of claimIEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 55 Risk Assessment Risk factors (2) •Client risks •Contractors •Stakeholders •3rd party client ( Authorities) •Selection- method, main contractor ,specialist ( soil treatment , shaft, pipe jacking , structures ) •Selecting –machine & skilled operators •Luck /planningIEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 56 37 of 38. 37 of 38. -Pipe Roof In Singapore-Sun
  38. 38. 25/10/2012 29 Preparing for contract •Contract documentation •Design/drawings •Specifications •Bills /Lump sum/VO IEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 57 Thank you , 58IIEM Conf Mar 2011- Pipe Roof Singapore-Sun, OKP 38 of 38. 38 of 38. -Pipe Roof In Singapore-Sun

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