Chenab PPT-Design Coordination-Srinivas.ppt

Chenab bridge construction coordination

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Chenab Bridge – Design
Coordination
Presentation
By
Srinivas Mantrala

2. 2
Objective of the Presentation
Current Industry Scenario
Present “ What is meant by Design Coordination”
along with the dependent issues and proposed
action plan
Current Status
Immediate Action Plan

3. 3
Current Industry Scenario
Turnkey Projects
Complex
Multi Disciplinary
Tenders based on EPC / PPP mode – Lump Sum
Price
Lowest Bidder
There is scarcity of resources

4. Skill Set Required
Multi Disciplinary Skills –
Thorough understanding of the functions of all the components of the
project.
Close coordination among the various systems / stakeholders
Benchmarking
Value Engineering
Specialist Domain Knowledge
Contract Management including planning and monitoring the
deliverables
With Client
With Consultants
Interpersonal Skills and Communication Skills
4

5. Design Coordination
5
Design of Enabling
Works
Design of Permanent
Structures
Contractual
Requirements
Construction
Methodology
Design
Coordination
Design Coordinator has to have an eye
on economy and ease of construction

6. Design Coordination – Stake Holders
6
Client
Design
Consultant
Project Team
at Site
Proof
Consultant
Supplier
CPMG
Other
Consultants
GFC
Drawings
Designer for
Enabling works

7. Functionalities with Different Stake Holders
Project Team at Site
Providing GFC Drawings in time
Agree for timelines based on the construction program
(Action Item A)
Providing Clarifications
7

8. Functionalities with Different Stake Holders
Design Consultant
Providing Inputs
GAD

Design Basis Note

Construction Methodology
Receipt of the Designs
Agree for timelines keeping in view the Action Item 1.
(Action Item 2)
Review of the Design
For completeness – Agreed Checklist
(Action Item 3)
For Compliance – Agreed Checklist
(Action Item 3)
For contractual requirements like BOQ
Seeking Clarifications
8

9. Functionalities with Different Stake Holders
Design Consultant
Obtaining the Clarifications sought by the Client and
Project Team at Site
Obtaining Parameters for monitoring during execution
Erection Manual (Action Item 4)
Obtaining Parameters for Suppliers of Bearings and
Expansion Joints
Interaction during execution
Submission of As Built Drawings
Project Completion Report – Designs Chapter
9

10. Functionalities with Different Stake Holders
Client
Submission of Designs and Drawings
Advise the design submission program
(Action Item 5)
Approvals for designs and drawings
Agree for timelines for approvals (Action Item 6)
Clarifications while getting approvals
10

11. Functionalities with Different Stake Holders
CPMG
Agree for the methodology of construction.
Provide Inputs from Design Consultant for construction
monitoring
Providing necessary clarifications
Proof Consultant
Normally there is no interaction.
Keep a watch on the correspondence between the Design
Consultant and Proof Consultant
11

12. Functionalities with Different Stake Holders
Designer for Enabling Works
Providing the methodology of construction.
Providing necessary clarifications.
Suppliers
Providing the technical specifications.
Providing necessary clarifications.
Other Consultants
Providing necessary inputs.
Providing necessary clarifications.
Review and Monitoring the deliverables
12

13. General Arrangement Drawing
1313
Arch Portion 785m Viaduct Portion 530m

14. 14
Breakup of Work for Monitoring
Permanent Work
Arch Portion – S10 to S70
Viaduct Portion – S70 to S180
Ancillary Works
Temporary Works
Arch Portion – S10 to S70
Viaduct Portion – S70 to S180

15. 15
Breakup of Work – Permanent - Arch Portion
Arch Portion – S10 to S70
Foundations – S10 to S70
Abutment – S10
Piers – S20, S30, S40, S40A, Spandrel Columns S41 to
S49, S50, S50A, S60, S70
Arch
Bearings and Expansion Joints
Deck Structure

16. 16
Breakup of Work – Permanent - Viaduct
Viaduct Portion – S70 to S180
Foundations – S70 to S180
Abutment – S180
Piers – S70 to S170
Bearings and Expansion Joints
Deck Structure

17. 17
Breakup of Work – Permanent - Ancillary
Slope Stability for S10-S40
Slope Stability for S50-S70
Slope Stability for S120 – S130
Slope Stability for S170 – S180
Cable Crane
Mechanically operating cages for steel piers

18. 18
Breakup of Work – Temporary - Arch Portion
Arch Portion – S10 to S70
Will be decided after finalizing the methodology of
erection of Arch.
Basic Components
Stays
Foundations for Stays
Anchorages
Launching Arrangements at S10
Launching Arrangements between S70 and S90
Derrick

19. 19
Breakup of Work – Temporary - Viaduct
Viaduct Portion S70 to S180
Launching Arrangements at S180
Launching Arrangements between S80 and S90
Temporary Pier between S170 and S180
Temporary Pier between S120 and S130 (To be decided)
Launching Nose
Side Guidance Arrangements

20. 20
Status
All the designs of the permanent Structures were
submitted once.
Based on the earlier designs, the foundations and piers
from S90 to S180 have been constructed.
The Design Basis Note for viaduct portion has been
revised.
The Design Basis Note for arch portion is under revision.
The arch span was revised from 460m to 467m. Founding
levels of arch and piers at S20, S30, S60 are under review.
Methodology of erection of deck in viaduct portion and
arch portion is under review.

21. 21
Broad Scope of Work
 Viaduct Portion
Firm up methodology of launching.
Check of the design of deck and pier and foundations at
S80 and S70 in terms of final DBN.
Recheck of the design of already constructed
components and assess the extent of overstress.
Arch Portion
Firm up methodology of erection of arch.
Take up fresh designs.

22. 22
Immediate Action Items
Firm up commercial offer for design checks of viaduct.
Agree with the Project Team for timelines based on the
construction program for issuing GFC Drawings.
Firm up methodology of launching of the deck
Agree with the Design Consultant for the dates for design
submissions.
Agree for timelines for approval with the client.
Firm up founding levels for foundations from S10 to S80
Follow up with the Client for finalizing the DBN for Arch
Portion

23. 23
Thanks

24. Middle Third Rule
24
e
x < L/6
e
y
< B/6