Bridge Maintenance
There are about 700,000 bridges in Japan. Many were built during Japan’s era of high economic growth from the mid-1950s to the early 1970s, and the bridge piers now need repair, reinforcement and maintenance.
In order to keep bridge infrastructure in good condition, JFE Technos responds to requests with the combined technologies and know-how of the JFE Group.
Examples of Bridge Maintenance Work
Seismic reinforcement work
Bridge pier reinforcement by reinforced concrete jacketing
ridge fall prevention device (buffer chain type)
Buffer pin type horizontal force dispersing structure
Bridge fall prevention device of water pipe bridgeLife extension work
Replacement of storm cables and stays of suspension bridge, repair of cross-section of floor slab, replacement of extension device, etc.
Replacement of metal fittings (turnbuckles) of main cable anchor mounting part
Partial replacement for chipped cross-section due to corrosion of water pipe (executed when installing a bridge fall prevention device of water pipe bridge)
Removal and installation of main roller of sluiceInspection, investigation, examination and diagnosis
Inspection of sluice (watertight rubber part)
Magnetic particle test for welded part on site
Radiographic test for welded part on site
Magnetic particle testing for fatigue crack
Non-destructive test by X-ray vehicleExample of Quality Inspection
Equipment investigation and diagnosis are carried out through nondestructive inspection and mechanical testing, and equipment is maintained in a safe condition with outstanding technologies and know-how. We can diagnose corrosion, fatigue and deterioration and propose appropriate repairs and reinforcement for each condition. We also perform diagnoses of large-scale cranes, motors and other equipment and can propose remaining life diagnosis.
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