This document discusses maintenance management of bridges and underpasses. It outlines threats like environmental factors, material deterioration, traffic usage, and human/terrorist threats. Specific threats in the Middle East include extreme temperatures and salty soil deteriorating concrete. The document recommends establishing routine maintenance, condition inspections, load assessments, and long-term asset management to ensure bridge safety. This includes data collection, preventative maintenance, and planned refurbishment/replacement.

1. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Maintenance Management of
Bridges and Underpasses
Javad Akhtar - Technical Director - Bridges
15 Nov 2009

2. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
The Challenges
• Large proportion of infrastructure built since
1980
• Recognition of particular threats to local
infrastructure
• Need increased emphasis to maintenance
whilst new construction continues apace
• Need to feedback maintenance issues to
improve designs

3. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
The Threats
• Environment – Flood, temperature changes, ground
• Breakdown of protective defences – paints, cover
concrete, waterproofing
• Structural Material Deterioration – degradation of
concrete, steel corrosion
• Traffic/Usage – Cyclic-fatigue damage, overloading,
impact
• Human – malicious damage, vandalism
• Failure of Secondary Elements – Parapets, joints,
drains, lights, bearings, monitoring systems

4. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Particular Threats to Structures
in The Middle East
• Extreme Temperatures
• Arid environment & salty ground – rapid build up of salts due to
evaporation/suction cycle and consequent concrete deterioration.
• Require high integrity waterproofing to protect buried concrete

5. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
General Threats – Examples
Impact Damage

6. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Impact

7. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats – Ground Conditions,
Cavities

8. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats – Hillside Movement

9. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats - Earthquake

10. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats - Terrorist

11. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats - Rockfall

12. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats - Landslide

13. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats – Flood-Scour

14. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats – Poor Workmanship

15. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Threats - Corrosion

16. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
So how do we Ensure safety
of our Bridges?
• Data collection about the Bridges
• Establish Routine and Operational
Maintenance Organisation
• Establish a cycle of Condition Inspections,
Load Capacity Assessments and
Refurbishment for Long-term Asset
Management

17. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Steps in attaining Bridge Maintenance Management System
2. Maintenance Operations System Full Asset Management
1. Data Collation and
Requirements
Collect and
collate
Structure Data
Requirements
of concerned
external
authorities
ADM
Requirements
and
Management
controls
Basic Structure InventorySuperficial
Inspections
and
Photographs
Maintenance Operations Centre
Inspectors
Works Contractor
Full Bridge Management Database
Implement Principal
Inspections of all Structures
and additional data collection
ADM Asset management
requirements
Procure Principal Inspections
and additional data collection -
surveys
Engineering Management Team

18. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Maintenance Category
• Routine and Operational
Maintenance
• Full Long Term Asset
Management

19. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Routine and Operational Maintenance
Aims
• To keep structure serviceable
• Respond to complaints and queries
• Manage Maintenance Contractor
• Program regular and preventative maintenance
• Emergency responce to accident damage by
“making safe”

20. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
• Preventative maintenance
• Innovation in products, equipment and
methods
• Anti-Graffiti coatings
• Durable finishes
• Environmentally friendly lighting and controls
• Automated data capture
Routine and Operational Maintenance
Best Value Maintenance Strategies

21. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Routine and Operational Maintenance
Essential Data For BMMS/Inventory

22. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
• Intelligent Lighting
• Remote Monitoring – automated defect
reporting
• Website
• Aesthetic Enhancements
• Integration with Public Transport Systems
• Architectural & Structural Refurbishments
Routine and Operational Maintenance
Potential Future Service Developments

23. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Long Term Asset Management
AIMS
• Assurance of Safety
• Assurance of reliable
service availability
• Maintain Asset Value
• Plan for major
refurbishment or
replacement

24. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
Long Term Asset Management
Approach
• Condition Classification of structures using Engineer-
led inspection cycles
• Assessment of the load carrying capacity
• Development of a framework for a bridge
management system.
• Asset Valuation and whole-life maintenance cost
evaluation to inform decision making
• Planned refurbishment – replacement
• Financial Planning

25. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
• Undertake at commencement and annually
• Aim is to visually inspect readily accessible parts of
structure (and particularly critical areas requiring
inspection in-between Principal Inspection cycle)
• Special access equipment or traffic closure usually
avoided
• Establish reference markers for settlement monitoring
• Identify and assess/monitor any cracks
Long Term Asset Management
General Inspections

26. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
• Undertake every 6-10 years
• Aim is to get within touching distance of all parts of
structure
• Special access equipment or traffic closure may be
involved
• May need to be done at off-peak traffic period
• Underwater Inspection/bed survey of River Crossings
• Concrete Testing for assessment of reinforcement
corrosion risk
Long Term Asset Management
Principal Inspections

27. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director

28. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director

29. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
• Establish condition of the structure
• Evaluate load carrying capacity
Long Term Asset Management
Load Assessment

30. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
• Assess rate of deterioration
• Evaluate maintenance/refurbishment treatments available
and their effectiveness, lifetime and cost
• traffic management costs (accounting for traffic flow rates and the
associated delay costs)
• cost of maintenance in the future discounted to present day
values
• implications for safety and traffic flow if the work is not
carried out immediately.
• Evaluate Residual Service life with/without refurbishment
Long Term Asset Management
Planned Major Refurbishments

31. © Hyder Consulting Middle East Ltd Javad Akhtar Technical Director
• Asset Database
• Inspection Module
• Works Management Module
• Abnormal Load Management
• Deterioration Prediction Models
• Whole Life Costing
• Performance Measures, including Bridge Condition
Indicator
• Asset Valuation
Long Term Asset Management
Bridge Management System - Components