THE NEW

BRIDGE REPAIR AND MAINTENANCE INTRODUCTION This reference manual were developed by DPWH TWG & CWG and the JICA Bridge Experts. It is an update of the manuals under the program Improvement of Quality Management for Highways and Bridge Construction and Maintenance. JICA-ASSISTEDOBJECTIVEEFFECTIVE MAINTENANCE AND REPAIR PROCEDURES is to provide instructions for an effective bridge maintenance and repair procedures, and can be used as concepts that can be adapted and expanded to provide solutions to specific bridge problems. These procedures are not intended to override existing agency guidelines or policy, but are to be used as a source of information when the need arises. They are not intended as a substitute for consulting an engineer - a structural engineer should be consulted if the repair involves a structural member. OBJECTIVE OVERVIEW OF GENERAL MANAGEMENT TECHNIQUES is to provide an overview of general management techniques useful to a bridge maintenance.

It is not only to acquaint the participant with techniques, but also to include the needs of middle and upper management to provide an understanding of why reports and documentation are important.

WHAT IS BRIDGE MAINTENANCE?

Work that is performed to keep a bridge in its current condition.

Work that is performed to restore the bridge to good condition; however, this may be called rehabilitation rather than maintenance work.

TRADITIONAL APPROACH for Bridge Maintenance That bridges were built and then deferred until they became obsolete or the road was upgraded. Bridge maintenance performed with minimum attention and resources. Large traffic volumes, and heavier loads have accelerated bridge deterioration. Bridges deteriorates faster than being repaired or maintained. DPWH recognized the fact that the tremendous investment in existing bridges has to be preserved. Government cannot afford to replace at the rate at which are deteriorating.

THE IMPORTANCE OF PREVENTIVE MAINTENANCEStudies discussed in many forum have convincingly shown that appropriate bridge maintenance activities, performed at the proper time, are cost effective. Studies have also shown that it costs less to maintain bridges in a good condition than to maintain them in a poor condition. Therefore, preventive maintenance is cost effective and deferring maintenance results in increased costs over the life of the structure.BRIDGE MAINTENANCE CONCEPTS Maintenance cannot improve functionally deficient bridges - structural deficiencies result from improper design and construction, improper maintenance is their number one cause. First, properly maintain each bridge to extend its service lifeSecond, immediately repair any structural damage or deterioration of the bridge to prevent increased damage or deterioration.Third, upgrade the load capacity of structures to meet traffic requirements.

Standard Bridge Repair ProceduresPart 1: Routine MaintenanceRoutine Maintenance RepairPart 2: Major MaintenanceMajor Maintenance RepairRepair of Concrete Deck SlabRepair of Concrete Bridge SuperstructureRepair of Concrete Bridge SubstructureRepair of Steel Bridge SuperstructureRepair of Bridge Expansion JointRepair of Bridge BearingRepair of Protection Works

ROUTINE MAINTENANCERoutine maintenance is combined with bridge inspection and preventive maintenance.Preventive Maintenance (PM) is the recurrent day-to-day, periodic, or scheduled work that is required to preserve or restore a bridge so that it can be effectively utilized as intended. The concept of preventive maintenance involves repair of small or potential problems in a timely manner so that they will not develop into expensive bridge replacements.ROUTINE MAINTENANCE REPAIRTYPE OF DEFECTS AND CAUSESROUTINE MAINTENANCE ACTIVITIESSCOPE OF ROUTINE MAINTENANCE AND REPAIRING METHODROUTINE MAINTENANCE REPAIRTYPE OF DEFECTS AND CAUSESSteel Bridge SuperstructureDeck Concrete Bridge Slab, Superstructure and SubstructureBridge AccessoriesProtection WorksDefects and its Corresponding Measure

Defect : Paint Peel-Off /corrosionStructure : Steel GirderCondition : Good loose rust formation & pitting on Paint Surface, no section lossProbable Cause : Thin paintMeasure : Touch Up PaintingDefects and its Corresponding MeasureDefect : Spalling/Scaling/DisintegrationStructure : Deck SlabCondition : Good affected area,