Bridge maintenance business | Yokogawa Bridge Corp.

Bridge maintenance project | Earthquake reinforcement

Seismic reinforcement outside the Tadagawa Bridge

Orderer (Original order)	Tohoku Regional Development Bureau Sendai River and National Highway Office
Construction site	Miyagi
Construction scale	12 buffer chains 48 right angle fixing devices 12 vibration control stoppers, etc.
Construction overview	Earthquake reinforcement work for Tadagawa Bridge and four other bridges.
Construction year	2013

Bridge maintenance project | Earthquake reinforcement

Prevention of bridge collapse outside Konan-ohashi Bridge

Orderer (Original order)	Tokyo Metropolitan Government Bureau of Finance First Construction Office
Construction site	Tokyo
Construction scale	47 PC cables Steel protrusion 73.6t 20 shear stoppers, etc.
Construction overview	Earthquake reinforcement work for Konan Bridge and Minamihama Bridge. Some dredging was done to divert the navigation route under the bridge.
Construction year	2013

Bridge maintenance project | Earthquake reinforcement

Toyota-ohashi Bridge earthquake reinforcement and repair

Orderer (Original order)	Toyota City
Construction site	Aichi
Construction scale	Reinforcement of upper support material/arch rib plate 10 bridge collapse prevention systems 8 step prevention units Repainting 8,250㎡
Construction overview	Seismic reinforcement and repair work for the Nielsenrose Bridge. Reinforcement of upper support members and arch ribs, prevention of bridge collapse, prevention of steps, and repainting were performed.
Construction year	2013

Bridge maintenance project | Earthquake reinforcement

Support replacement near Yamashita on Kariba Line

Orderer (Original order)	Metropolitan Expressway Co., Ltd. Kanagawa Management Bureau
Construction site	Kanagawa
Construction scale	109 bearings replaced 132 step prevention devices 188 bridge collapse prevention devices, etc.
Construction overview	Construction work to improve the earthquake resistance of 3 steel girders on the Kanagawa Expressway No. 23 Kariba Line and steel girders on the Kanagawa Expressway No. 1 Yokohane Line.
Construction year	2012

Bridge maintenance project | Earthquake reinforcement

Hanwa Expressway Yuyadani Bridge (inbound line) seismic reinforcement

Orderer (Original order)	West Japan Expressway Co., Ltd.
Construction site	Wakayama
Construction scale	32 bridge collapse prevention structures 44 bearing replacements 10 vibration dampers 46 shear dampers, etc.
Construction overview	We carried out seismic reinforcement of the superstructure of the Hanwa Expressway's truss bridges, rigid-frame bridges, and arch bridges, and installed carbon fiber lining and steel plate lining for the substructure.
Construction year	2012

Bridge maintenance project | Earthquake reinforcement

Tabina Bridge seismic reinforcement

Orderer (Original order)	Chiba Prefecture Kimitsu Civil Engineering Office
Construction site	Chiba
Construction scale	32 buckling restraint braces Replaced 4 parts of the lower horizontal structure with corrosion, etc.
Construction overview	Earthquake reinforcement and repair of corroded parts for Tabina Bridge (steel arch bridge).
Construction year	2011

Bridge maintenance project | Earthquake reinforcement

Okuaso-ohashi Bridge seismic reinforcement

Orderer (Original order)	Kumamoto Prefecture Kamimashiki Regional Promotion Bureau
Construction site	Kumamoto
Construction scale	Factory manufactured 107.3t Girder reinforcement 28t 4 sets of bridge collapse prevention devices 24 sets of shear stoppers 8 sets of viscous dampers 4 sets of axial yield type dampers, etc.
Construction overview	Seismic reinforcement work for steel deck type braced rib arches and steel continuous plate Girder bridges.
Construction year	2011

Bridge maintenance project | Earthquake reinforcement

Bunkyo Bridge collapse prevention

Orderer (Original order)	Ibaraki Prefecture Mito Civil Engineering Office
Construction site	Ibaraki
Construction scale	96 bridge collapse prevention devices installed
Construction overview	Bridge collapse prevention device installation work for Bunkyo Bridge (PC girder).
Construction year	2010

Bridge maintenance project | Earthquake reinforcement

Katsushika Harp Bridge seismic reinforcement

Orderer (Original order)	Metropolitan Expressway Co., Ltd. East Tokyo Management Bureau
Construction site	Tokyo
Construction scale	Displacement Limiting Device Uplift prevention device, steel ring, etc.
Construction overview	Earthquake reinforcement work for the Katsushika Harp Bridge on the Central Loop Line.
Construction year	2009

Bridge maintenance project | Earthquake reinforcement

Improved earthquake resistance of Rainbow Bridge

Orderer (Original order)	Metropolitan Expressway Co., Ltd. East Tokyo Management Bureau
Construction site	Tokyo
Construction scale	Main tower reinforcement Main tower wind shoe reinforcement Side tower wind tongue reinforcement etc.
Construction overview	Earthquake reinforcement work for Rainbow Bridge on Highway Route 11 Daiba Line.
Construction year	2009

Bridge maintenance project | Floor slab

Nishi-Meihan Miyuki-ohashi Bridge (inbound line) west deck replacement (2)

Orderer (Original order)	West Japan Expressway Co., Ltd. Kansai Branch
Construction site	Nara
Construction scale	Precast PC floor slab 405㎡ Reinforcement and repair of patch plate 130.62t, etc.
Construction overview	During the intensive construction work on Miyuki Bridge on the Nishi-Meihan Expressway, the bridge was closed to traffic at night (one side was left open during the day) and replaced with a PC floor slab.
Construction year	2012

Bridge maintenance project | Floor slab

Jabuchi Bridge deck slab replacement, etc.

Orderer (Original order)	Kinki Regional Development Bureau Toyooka River and National Highway Office
Construction site	Hyogo
Construction scale	Precast PC floor slab 1227㎡ RC floor slab 18㎥ etc.
Construction overview	The Jabuchi Bridge over National Route 9 was closed to one lane all day and replaced with a precast PC version.
Construction year	2011

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