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Rehabilitation method of simple mean by Up-Down method of temporary
support
This design method used that to
effective cope with reducing stress on the final state and with
deflection and crack of existing beam. Just introduces the secondary
compressing force by equiping with temporary support to center section
of span of existing beam that have removed deck plate concrete and
risen temporary support and unify with the existing beam by pouring
deck plate concrete and make compressing stress add to understructure
of existing beam by removing the temporary support.
Execution scheme |
Execution step |
Simple beam structure and
moment diagram when slab concrete is removed |
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Structural system and moment
diagram when the temporary support is risen |
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Moment diagram by fixed-supported
state in center section and slab load |
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Structural system and moment
diagram when temporary support is removed |
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Structural system and moment
diagram when live load is applied |
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Rehabilitation method of the exiting continuous beam bridge
Execution contents |
Rehabilitation method by removing
the part of deck plate |
State that is removed the
part of deck plate |
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Pour concrete in the section
of negative moment |
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Up-support |
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Pour concrete in the section
of negative moment |
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Down-support |
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Pouring asphalt |
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Execution contents |
Rehabilitation method by removing
all of the deck plate |
State that is removed the
part of deck plate |
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Pour concrete in the section
of negative moment |
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Up-support |
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Pour concrete in the section
of negative moment |
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Down-support |
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Pouring asphalt |
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Rehabilitation crack method of the existing bridge by loading
This rehabilitation method improve
uncertainty of resin injection which is the problem that rehabilitation
methods by existing resin injection into the existing bridges have
by applying load. And, after the injected resin harden, the restoring
force by unloading introduces the compressing force into the injected
resin, so this method which is the method of crack rehabilitation
to improve quality of existing bridge can be applied to P.S.C.,
Preflex bridges and all of other bridges.
Execution contents |
Rehabilitation crack method
of one span |
Loading and injection-refilling |
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Equip injection pipe |
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Rehabilitation crack method
of two span continuous beam bridge |
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A panorama photograph of injected
epoxy resins and hardening |
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