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Project
Execution
12-03-2015 1
one step towards project management excellence...
Palla Narasimhudu
12-03-2015 2
Introduction:-
12-03-2015 3
Objectives:-
Identify, Analyze the Risk Factors
Perform Qualitative and Quantitative Analysis
Plan for Risk Mitigation
Monitor and Control throughout the project life cycle
Control of future risks and Pro-activeness
Develop Risk Response strategies and Contingency plans for unexpected
Risk register for further similar projects
Scope :-
12-03-2015 4
Risks in EPC Project:-
12-03-2015 5
Engineering
• Project Feasibility
• Viability
• Technology selection
• Design
• Joint venture
• Geographical
conditions
• Funding
Construction
•Utility and Traffic diversion*
•Survey works
•Diaphragm Walling*
•Excavation
•Decking and steel struts*
•Tunnel mining and cross passage*
•Accidents/ Losses of lives
•Non- availability of manpower
•Confined space
•Quality
•Clarity less communication
•Soil condition
•Bad Infrastructure
Procurement
• Underestimate the
need
• Quality supplier
selection
• Offers fail to meet the
needs
• Insufficient funds
Unforeseen
• Sudden collapse of soil
• Heavy rains and floods
• Sudden settlements
• Extreme temperature
Execution
• Delay in land acquisition
• Inexperience project
management/ team
• Ineffective decomposition
of work
• Regulatory issues
• Failure to forecast
• Design changes
• Stake holder management
• Safety/ Environmental
• Political
• Decision making
• Currency / commodities
fluctuation
*varies for different projects
228m
24m19m
228m
24m19m
228m
24m19m
EGMORE NEHRU PARK KMC PACHAIPPA SHENOY
NAGAR
Station Length = 228m + 228m + 228m = 684m
Tunnel Length = 947m + 573m + 898m + 966 = 3384m
22m 22m 24m
Cross Passage = 3nos + 2nos + 3nos + 3nos = 11nos
12-03-2015
6
Case Study- UAA-04 CMRL Project
Risk identification and action plans- UAA-04
12-03-2015 7
12-03-2015 8
Existing Diverted-1 Diverted-2
Impact- Road diversion and D-Wall Construction
Mitigation-
1) Stage wise diversion
2) Interchange and inter-displacement of utilities for D-Wall construction
Risk-
Space constraint in Utility diversion
Utilities running across station
12-03-2015 9
Risk-
Space constraint in traffic diversion
Impact-
D-Wall Construction
Shaft Handover for TBM launching
Mitigation-
1) Stage wise diversion
2) Decking for traffic
12-03-2015 10
UG Metro Station - Plan
20m 20m
40m
60m
Risk- Excavation with strut Impact- Possible Delay in shaft handover for TBM launch
Mitigation-
1) D-Wall design change without strut
2) Modified excavation sequence of 12m max with additional centre opening
12m
Post Risk Analysis-
• Poly-mud level was 1.5mt below the Ground Level
• Due to heavy rain there was contamination of seepage water and polymer properties may reduce which may be
insufficient to withstand the top loose strata
• Continuous rain, rise in ground water level immediately below the guide wall due to the heavy rain, higher than the
poly-mud level
• Vibration due to chiselling
12-03-2015 11
Diaphragm Wall Trench Collapse- P147
Impact-
1) Progress hamper for other panels
2) Plan for mitigation
Mitigation-
1. Bund making over the guide wall and Keeping poly-mud level always
higher than the GW level
2. Equal quantity of crusher dust was stoked for immediate risk mitigation.
Immediate risk response-
Collapsed trench filled with M5 grade concrete
Bund
Risk factor-
Likelihood- 0.25
Potential impact- Time- 1 week delay, Cost- Rs 14 Lacs
Risk cost= 14 Lacs x 0.25= 3.5 Lacs
Risk Time= 1 week x 0.25= 0.25 Week
Post Risk Analysis-
1. Volume losses due to water ingress from the joint locations
2. Under cut/ Over cut while grabbing of D-Wall Panels
3. Honey comb formation due to underwater concreting
4. Chances of soil collapse while concreting affecting quality of concrete
5. Improper fixing of Water bars at joints
12-03-2015 12
Cavity formation at base level of P101 and 102
Impact-
1) Sink hole formation on road
2) Dangerous occurrence
3) Ingress of water and slush inside station
Immediate risk response-
Traffic diversion
Backfilling near affected area
Sink hole filled with concrete
40mm Plate laid over top surface of road
12-03-2015 13
Risk factor-
Likelihood- 0.25
Potential impact- Time- 4 week delay, Cost- Rs 44 Lacs
Risk cost= 44 Lacs x 0.25= 11 Lacs
Risk Time= 4 weeks x 0.25= 1 Week
Mitigation-
1. Installation of bore-well adjacent to the affected D-Walls
2. Lowering the water table with the help of installed bore wells
3. Excavating inside the station box near the affected panel up to a depth of 1m
4. Steel plate fixing at the affected location
5. Micro-concrete grout in the affected panels.
Action taken-
1. Contiguous pile
2. Provision of grouting column around the Contiguous pile
Risk Assessment Matrix
12-03-2015 14
Innovations in Method of Constructions
12-03-2015 15
Utility Diversion
Inter displacement and interchange of Utility diversion Methodology to expedite
Diaphragm wall Construction for streamlining with the planned programme.
Training of one team to take off the diversion works internally to reduce the contractor
dependency risk
Provision of a new opening at Roof for carrying excavation without struts
Elimination of struts at Base level by modified design for D-Walls
By making bund over the guide wall
Keeping the poly-mud level always higher than the ground water level
Installation of bore-well adjacent to the affected D-Walls and lowering water table to
reduce the ingress of water and micro-concrete at 1m at intervals as a control measure to
avoid the risk of sink hole
Excavation Sequence
Soil Collapse in D-Walls
D-Wall Cavity formation
Conclusion and Learnings:-
12-03-2015 16
12-03-2015 17

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Risk management large epc projects

  • 1. Project Execution 12-03-2015 1 one step towards project management excellence... Palla Narasimhudu
  • 3. 12-03-2015 3 Objectives:- Identify, Analyze the Risk Factors Perform Qualitative and Quantitative Analysis Plan for Risk Mitigation Monitor and Control throughout the project life cycle Control of future risks and Pro-activeness Develop Risk Response strategies and Contingency plans for unexpected Risk register for further similar projects
  • 5. Risks in EPC Project:- 12-03-2015 5 Engineering • Project Feasibility • Viability • Technology selection • Design • Joint venture • Geographical conditions • Funding Construction •Utility and Traffic diversion* •Survey works •Diaphragm Walling* •Excavation •Decking and steel struts* •Tunnel mining and cross passage* •Accidents/ Losses of lives •Non- availability of manpower •Confined space •Quality •Clarity less communication •Soil condition •Bad Infrastructure Procurement • Underestimate the need • Quality supplier selection • Offers fail to meet the needs • Insufficient funds Unforeseen • Sudden collapse of soil • Heavy rains and floods • Sudden settlements • Extreme temperature Execution • Delay in land acquisition • Inexperience project management/ team • Ineffective decomposition of work • Regulatory issues • Failure to forecast • Design changes • Stake holder management • Safety/ Environmental • Political • Decision making • Currency / commodities fluctuation *varies for different projects
  • 6. 228m 24m19m 228m 24m19m 228m 24m19m EGMORE NEHRU PARK KMC PACHAIPPA SHENOY NAGAR Station Length = 228m + 228m + 228m = 684m Tunnel Length = 947m + 573m + 898m + 966 = 3384m 22m 22m 24m Cross Passage = 3nos + 2nos + 3nos + 3nos = 11nos 12-03-2015 6 Case Study- UAA-04 CMRL Project
  • 7. Risk identification and action plans- UAA-04 12-03-2015 7
  • 8. 12-03-2015 8 Existing Diverted-1 Diverted-2 Impact- Road diversion and D-Wall Construction Mitigation- 1) Stage wise diversion 2) Interchange and inter-displacement of utilities for D-Wall construction Risk- Space constraint in Utility diversion Utilities running across station
  • 9. 12-03-2015 9 Risk- Space constraint in traffic diversion Impact- D-Wall Construction Shaft Handover for TBM launching Mitigation- 1) Stage wise diversion 2) Decking for traffic
  • 10. 12-03-2015 10 UG Metro Station - Plan 20m 20m 40m 60m Risk- Excavation with strut Impact- Possible Delay in shaft handover for TBM launch Mitigation- 1) D-Wall design change without strut 2) Modified excavation sequence of 12m max with additional centre opening 12m
  • 11. Post Risk Analysis- • Poly-mud level was 1.5mt below the Ground Level • Due to heavy rain there was contamination of seepage water and polymer properties may reduce which may be insufficient to withstand the top loose strata • Continuous rain, rise in ground water level immediately below the guide wall due to the heavy rain, higher than the poly-mud level • Vibration due to chiselling 12-03-2015 11 Diaphragm Wall Trench Collapse- P147 Impact- 1) Progress hamper for other panels 2) Plan for mitigation Mitigation- 1. Bund making over the guide wall and Keeping poly-mud level always higher than the GW level 2. Equal quantity of crusher dust was stoked for immediate risk mitigation. Immediate risk response- Collapsed trench filled with M5 grade concrete Bund Risk factor- Likelihood- 0.25 Potential impact- Time- 1 week delay, Cost- Rs 14 Lacs Risk cost= 14 Lacs x 0.25= 3.5 Lacs Risk Time= 1 week x 0.25= 0.25 Week
  • 12. Post Risk Analysis- 1. Volume losses due to water ingress from the joint locations 2. Under cut/ Over cut while grabbing of D-Wall Panels 3. Honey comb formation due to underwater concreting 4. Chances of soil collapse while concreting affecting quality of concrete 5. Improper fixing of Water bars at joints 12-03-2015 12 Cavity formation at base level of P101 and 102 Impact- 1) Sink hole formation on road 2) Dangerous occurrence 3) Ingress of water and slush inside station Immediate risk response- Traffic diversion Backfilling near affected area Sink hole filled with concrete 40mm Plate laid over top surface of road
  • 13. 12-03-2015 13 Risk factor- Likelihood- 0.25 Potential impact- Time- 4 week delay, Cost- Rs 44 Lacs Risk cost= 44 Lacs x 0.25= 11 Lacs Risk Time= 4 weeks x 0.25= 1 Week Mitigation- 1. Installation of bore-well adjacent to the affected D-Walls 2. Lowering the water table with the help of installed bore wells 3. Excavating inside the station box near the affected panel up to a depth of 1m 4. Steel plate fixing at the affected location 5. Micro-concrete grout in the affected panels. Action taken- 1. Contiguous pile 2. Provision of grouting column around the Contiguous pile
  • 15. Innovations in Method of Constructions 12-03-2015 15 Utility Diversion Inter displacement and interchange of Utility diversion Methodology to expedite Diaphragm wall Construction for streamlining with the planned programme. Training of one team to take off the diversion works internally to reduce the contractor dependency risk Provision of a new opening at Roof for carrying excavation without struts Elimination of struts at Base level by modified design for D-Walls By making bund over the guide wall Keeping the poly-mud level always higher than the ground water level Installation of bore-well adjacent to the affected D-Walls and lowering water table to reduce the ingress of water and micro-concrete at 1m at intervals as a control measure to avoid the risk of sink hole Excavation Sequence Soil Collapse in D-Walls D-Wall Cavity formation