1 General Provisions
1.0.1 This code is formulated with view to strengthening maintenance management of highway bridges and culverts, keeping the bridges and culverts under normal service condition, and ensuring traffic flow smooth and safe.
1.0.2 This code is applicable to maintenance of bridges and culverts in national highway, provincial highway and county highway, and applies to maintenance of bridges and culverts in other highways by reference. Special maintenance and management regulations may be formulated for the special bridges in the principle of this code and according to different conditions and requirements.
1.0.3 Main content and basic requirements of maintenance of highway bridges and culverts:
1 Inspection and evaluation system for highway bridges and culverts shall be established and improved. Periodic inspection shall be carried out for the structure of highway bridges and culverts to systematically grasp the technical conditions and timely find defects and relevant environment changes. Technical conditions of bridges shall be classified and evaluated and corresponding maintenance solutions shall be established according to the inspection results of bridges.
2 Highway bridge management system and highway bridge database shall be set up for monitoring defects of bridges and culverts and making scientific decisions. Grand bridge load alarm system and prevention decision making system for earthquake, flood and floating ice shall be established gradually.
3 Maintenance of highway bridges and culverts shall be such that: tidy appearances of bridges and culverts; solid and flat bridge deck pavement; proper cross slope; smooth and proper connection of bridge head; smooth drainage; structure in good condition; complete and intact auxiliary facilities, e.g. sign, mark and marking.
4 As for maintenance of bridge/culvert structures, first the existing structures shall be maintained to meet the bearing requirements at designed load class and the traffic requirements at design traffic volume. Bearing capacity and traffic capacity may be improved by reconstruction and renovation in accordance with the requirements of traffic development.
Attention shall be paid to the relationship between the new and existing structures to give full play to the actions of existing structures when determining the reconstruction or renovation scheme.
5 Attention shall be paid to guarantee the safe passage of rolling stock and pedestrians as well as environmental protection in maintenance work and engineering implementation.
6 As for maintenance of bridge/culvert structure, there shall be protective measures against such disasters as flood, floating ice, debris flow and earthquake as well as emergency traffic scheme.
7 Hand-over and maintenance of new or renovated bridge shall have complete handover procedures, for which complete technical data shall be provided. Grand bridge and long bridge shall be equipped with maintenance facilities and equipment, for which maintenance passage, escalator, suspender and platform shall be arranged, and the design organization shall provide key points and requirements of maintenance technologies. Maintenance facilities and equipment shall be added according to the actual demand if they are absent or deficient.
8 Bridge/culvert structure inspection and technical condition evaluation, maintenance solution, maintenance, strengthening, final acceptance of renovation and other related technical documents shall be incorporated into bridge maintenance technology archives and database in standard format.
1.0.4 Maintenance of highway bridges and culverts shall comply with the following technical policies:
1 Maintenance of highway bridges and culverts, in the principle of "prevention first and combining prevention with control", emphasizes the load-bearing components, taking maintenance of bridge deck as its center, which shall be strengthened fully and carried out comprehensively.
2 Advanced maintenance technologies and scientific management methods shall be popularized and applied, so as to improve maintenance production means, upgrade maintenance technology level, and vigorously promote and develop maintenance machinery of highway bridges and culverts.
1 General Provisions
2 Terms
3 Inspection and Evaluation of Bridges
3.1 General Requirements of Bridge Inspection
3.2 Frequent inspection
3.3 Regular Inspection
3.4 Special Inspection
3.5 Evaluation of Bridge
4 Maintenance of Bridge Superstructure
4.1 Maintenance and Repair of Bridge Deck System
4.2 Maintenance and Strengthening of Reinforced Concrete Beam Bridge
4.3 Maintenance and Strengthening of Prestressed Concrete Beam Bridge
4.4 Maintenance and Strengthening of Arch Bridge
4.5 Maintenance and Strengthening of Steel Bridge
4.6 Maintenance and Strengthening of Steel-concrete Composite Beam Bridge
4.7 Maintenance and Strengthening of Cable Stayed Bridge
4.8 Maintenance and Strengthening of Suspension Bridge
4.9 Maintenance and Replacement of Bridge Bearing
5 Maintenance of Bridge Substructure
5.1 Maintenance and Strengthening of Pier/Abutment and Foundation
5.2 Maintenance and Strengthening of Pier and Abutment
5.3 Maintenance of Conical Slope and Wing Wall
6 Maintenance of Passage, Overpass Bridge and Viaduct Bridge
6.1 Maintenance of Passage
6.2 Maintenance of Overpass Bridge and Viaduct Bridge
6.3 Strengthening of Passage, Overpass Bridge and Viaduct Bridge
7 Seismic Strengthening of Bridge
7.1 Principle for Seismic Strengthening of Bridge
7.2 Investigation on Seismic Strengthening
7.3 Seismic Strengthening of Beam Bridge
7.4 Seismic Strengthening of Arch Bridge
7.5 Seismic Strengthening of Pier/Abutment and Foundation
8 Measures for Overweight Vehicles to Cross the Bridge
8.1 General Requirements
8.2 Checking Calculation and Load Test for Overweight Vehicle to Cross
8.3 Strengthening Measures
8.4 Technical Control for Overweight Vehicles to Cross
9 Maintenance of Submersible Bridge and Road Surface
9.1 General Requirements
9.2 Maintenance of Submersible Bridge
9.3 Maintenance of Submersible Road Surface
10 Maintenance of Regulating Structures
10.1 Routine Maintenance of Regulating Structures
10.2 Repairing and Strengthening of Regulating Structures
11 Prevention/Control and Emergency Repair of Bridge Disasters
11.1 General Requirements
11.2 Washout Prevention
11.3 Emergency Flood Control and Repair in Flood Period
11.4 Prevention and Control of Ice Damage
11.5 Prevention and Control of Freezing Damage
11.6 Prevention and Control of Mud-rock Flow
12 Culvert
12.1 General Requirements
12.2 Inspection of Culvert
12.3 Daily Maintenance of Culvert
12.4 Maintenance and Rebuilding of Culvert
Appendix A Bridge Basic Status Card
Appendix B Recording Sheet of Frequent Inspection for Bridge
Appendix C Recording Sheet of Regular inspection for Bridge
Appendix D Table of Regular inspection for Culvert
Explanation of Wording in This Code
