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The Ikeda-ohashi Bridge

  • The Ikeda-ohashi Bridge
  • The Ikeda-ohashi Bridge
  • The Ikeda-ohashi Bridge

Tokushima

Client: MLIT (National government)

The Ikeda-ohashi Bridge is a 294-meter-long bridge spanning the Yoshino River in Miyoshi City, Tokushima Prefecture. In this project, bearings were replaced in the central truss to improve earthquake resistance. The project received an award from Director of Tokushima Office of Rivers and National Highways of the MLIT’s Shikoku Regional Development Bureau for its safety-conscious construction work, which included the installation of temporary girders that were not part of the original plan to replace bearings with a total weight of approximately six tons.(2021)

Yotsuike Viaduct and others on
National Highway 26

  • Yotsuike Viaduct and others on National Highway 26
  • Yotsuike Viaduct and others on National Highway 26
  • Yotsuike Viaduct and others on National Highway 26

Osaka

Client: MLIT (National government)

In addition to the seismic reinforcement work for bearing reinforcement structures, etc., for two bridges over National Highway 26, one more difficult bridge repair work with a demanding process was added. Although three bridges were to be constructed simultaneously, the Osaka National Highway Office of the MLIT’s Kinki Regional Development Bureau highly praised the project for its smooth process management, including measures to deal with neighboring residents and coordination with other construction projects in the vicinity, and we were awarded the Bureau Director’s Commendation for Excellent Construction.(2021)

Hamacho Station
(Metropolitan Subway)

  • Hamacho Station(Metropolitan Subway)
  • Hamacho Station(Metropolitan Subway)

Tokyo

Client: Railway company

Hamacho Station is a subway station on the Toei Shinjuku Line in Chuo Ward operated by the Tokyo Metropolitan Bureau of Transportation. It opened on December 21, 1978, meaning it will have been in operation for 43 years by the end of 2021. Since the construction was done on the subway premises while it was in operation, work had to be performed within the limited time from 24:35 after the last train departed to 3:30 in the morning, before the first train arrived. The project included the renewal of elevators and escalators, and we paid close attention to details such as notifying general users of downtime due to construction, and other matters such as security guard deployment, training and communications. Thanks to these fforts, the work was completed safely and successfully.(2020)

Sasanoda Bridge

  • Sasanoda Bridge
  • Sasanoda Bridge

Iwate

Client: Local government

Sasanoda Bridge is a loop bridge with a total length of 234 meters over National Route 343, which is designated as a reconstruction road for the Great East Japan Earthquake. The bridge piers are 60 meters high, and as part of the seismic strengthening work, carbon fiber was wound around the piers to reinforce them, and a bridge collapse prevention device was installed in the superstructure. We installed construction lifts to reduce theamount of labor required since the work involved moving along a height of 50 meters. The construction was completed without any accidents or mishaps, and received high praise from the client.(2020)

Metropolitan Expressway
Route No.6 Mukojima Line

  • Metropolitan Expressway Route No.6 Mukojima Line
  • Metropolitan Expressway Route No.6 Mukojima Line
  • Metropolitan Expressway Route No.6 Mukojima Line

Tokyo

Client: Expressway company

In the large-scale repair work on the Metropolitan Expressway Route No.6 Mukojima Line, we reinforced the bridge deck with carbon fiber and repaired fatigue cracks in the steel girders. We smoothly completed complicated construction adjustments with the riverside project (a large-scale project including the construction of a super embankment, large buildings, and landscape maintenance) adjacent to the construction area. The work was highly praised by the Metropolitan Expressway Co., Ltd and we received the President’s Commendation for Excellent Construction award.(2020)

Karakuwa Tunnel

  • Karakuwa Tunnel
  • Karakuwa Tunnel
  • Karakuwa Tunnel

Miyagi

Client: MLIT (National government)

The Karakuwa Tunnel is a 830m long tunnel located on National Route 45 in Kesennuma City, Miyagi Prefecture. We reinforced the inner surface of the tunnel with carbon fiber sheets. Road related consultations and other matters took time because the narrow width of the road meant the passage of large vehicles had to be restricted. However, we greatly shortened the time required for construction and safely completed the works, earning high praise from the MLIT’s Tohoku Regional Development Bureau, and we were awarded the Bureau Director’s Commendation for Excellent Construction.(2020)

National Route 165
Hakusan-ohashi Bridge

  • National Route 165 Hakusan-ohashi Bridge
  • National Route 165 Hakusan-ohashi Bridge
  • National Route 165 Hakusan-ohashi Bridge

Mie

Client: Local government

Seismic strengthening, 2019

Nagoya Expressway No.3
Odaka Line

  • Nagoya Expressway No.3 Odaka Line
  • Nagoya Expressway No.3 Odaka Line
  • Nagoya Expressway No.3 Odaka Line
  • Nagoya Expressway No.3 Odaka Line
  • Nagoya Expressway No.3 Odaka Line
  • Nagoya Expressway No.3 Odaka Line

Aichi

Client: Expressway company

Life extention work, 2019

National Route 17
Tsukuba Footbridge

  • National Route 17 Tsukuba Footbridge
  • National Route 17 Tsukuba Footbridge
  • National Route 17 Tsukuba Footbridge
  • National Route 17 Tsukuba Footbridge
  • National Route 17 Tsukuba Footbridge
  • National Route 17 Tsukuba Footbridge

Saitama

Client: MLIT (National government)

Repair work, 2019

Aogishi Bridge

  • Aogishi Bridge
  • Aogishi Bridge
  • Aogishi Bridge
  • Aogishi Bridge
  • Aogishi Bridge
  • Aogishi Bridge

Wakayama

Client: Local government

Seismic strengthening, 2019

National Route 33
Niyodogawa-ohashi Bridge

  • National Route 33 Niyodogawa-ohashi Bridge
  • National Route 33 Niyodogawa-ohashi Bridge
  • National Route 33 Niyodogawa-ohashi Bridge
  • National Route 33 Niyodogawa-ohashi Bridge

Kochi

Client: MLIT (National government)

Seismic strengthening, 2019

Ochiai Bridge

  • Ochiai Bridge
  • Ochiai Bridge
  • Ochiai Bridge
  • Ochiai Bridge
  • Ochiai Bridge
  • Ochiai Bridge

Miyagi

Client: Local government

Seismic strengthening, 2019

Futase Bridge

  • Futase Bridge
  • Futase Bridge
  • Futase Bridge
  • Futase Bridge
  • Futase Bridge
  • Futase Bridge

Shizuoka

Client: Local government

Seismic strengthening, 2019

Arakawa River and
Nakagawa River truss bridge

  • Arakawa River and Nakagawa River truss bridge
  • Arakawa River and Nakagawa River truss bridge
  • Arakawa River and Nakagawa River truss bridge
  • Arakawa River and Nakagawa River truss bridge

Tokyo

Client: Railway company

Deterioration prevention, 2019

Kagamigawa-ohashi Bridge

  • Kagamigawa-ohashi Bridge
  • Kagamigawa-ohashi Bridge
  • Kagamigawa-ohashi Bridge
  • Kagamigawa-ohashi Bridge
  • Kagamigawa-ohashi Bridge
  • Kagamigawa-ohashi Bridge

Kochi

Client: MLIT (National government)

Seismic strengthening, 2019

Kachigawa Bridge

  • Kachigawa Bridge
  • Kachigawa Bridge
  • Kachigawa Bridge
  • Kachigawa Bridge
  • Kachigawa Bridge
  • Kachigawa Bridge

Aichi

Client: MLIT (National government)

Seismic strengthening, 2019

Toirigawa Bridge

  • Toirigawa Bridge
  • Toirigawa Bridge
  • Toirigawa Bridge
  • Toirigawa Bridge

Gunma

Client: Expressway company

Life extention work, 2019

Hanshin Expressway No.11
Ikeda Line

  • Hanshin Expressway No.11 Ikeda Line
  • Hanshin Expressway No.11 Ikeda Line

Osaka

Client: Expressway company

Life extention work, 2018

Nanadaru Loop Bridge

  • Nanadaru Loop Bridge
  • Nanadaru Loop Bridge
  • Nanadaru Loop Bridge
  • Nanadaru Loop Bridge

Shizuoka

Client: Expressway company

Seismic strengthening, 2018

Otobaru Bridge

  • Otobaru Bridge
  • Otobaru Bridge
  • Otobaru Bridge
  • Otobaru Bridge

Oita

Client: Expressway company

Seismic strengthening, 2018

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