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2019 Outstanding Civil Engineering Achievement Award


1. Expressway construction in urban areas that made full use of advanced trenchless technology including the rectangular shape shield-The Hanshin Expressway Yamatogawa Route Tokiwa Section Cut- and-Cover Tunnel Project -


  • Hanshin Expressway Co., Ltd.
  • Kajima-Tobishima Construction Joint Venture

Tokiwa work section, including 350m of main track (box culvert tunnel) and 2 ramps, originally planned to be constructed using cut-and-cover tunneling method. However, regarding the exit ramp, non-open-cut tunneling methods were finally selected to mitigate the inconvenience of local residents due to the restriction to the local road in front of their houses by retaining walls. We adopted two non-open-cut tunneling methods. Non-open-cut tunneling methods were enabled by the combination of rectangular shape shield tunnel, which was applied for the first time in Japan, and the advanced technology of widening a box culvert underground.

2. Strengthening networks between metropolitan areas “Upgrade of Kobe Junction for Shin-Meishin Expressway”


  • Kansai Branch, West Nippon Expressway Co., Ltd.
  • Obayashi Corp.

This project upgraded Kobe Junction from an existing three-expressway junction to a four-expressway junction through the construction of Shin-Meishin Expressway. It was necessary to minimize the social impact and the impact on high traffic expressways that operated with 100,000 vehicles a day as much as possible during construction. Therefore, we materialized the safety of general vehicles and drastically shortened construction period through the following innovations: the use of reinforced concrete diaphragm walls for bridge substructure and foundation, rational detours using existing expressways, and one-time removal of existing bridges using self-propelled modular transporters. We believe that these innovations can be widely applied to future large-scale expressway renewal works.

3. Productivity Improvement Effect and Quality Improvement of Bridge Pier by Applying Truss Support for Large-scale Steel Pipe Sheet Pile Foundation at Sea


  • Kajima Corp. Tohoku Branch

The National Route 45 Kesennuma Bay Bridge pier foundation on the sea is a large-scale steel pipe sheet pile foundation with a flat dimension of about 30 m x 40 m. As a result, the strut supports at the temporary partition were overcrowded, and the risk of process delay due to a decrease in work efficiency and the risk of long-term durability due to interference between the support steel and the frame were considered. In contrast, by converting the support structure to truss and changing the construction procedure, it became possible to increase the opening size and omit the intermediate piles. The aforementioned risk avoidance was achieved, and high quality bridge piers were constructed within the construction period.

4. Realization of the productivity improvement in the railway construction work by the maximum utilization of BIM

   –The introduction of JRE-BIM -


  • East Japan Railway Company
  • JR East Consultants Company
  • TEKKEN Corporation
  • JR East Design Corporation

This project aims for the productivity improvement of JR Kobari station overbridge construction by BIM. At first, the common data environment (CDE) was built and used by all persons concerned with this project. This CDE was able to computerization and acceleration of the information. In addition, by the inspection of the accuracy of the laser surveying, the measurement procedure that secured precision was established. And we avoided reworking and receive early agreement formations by BIM. In adding process data to BIM, the safety of this project improved too. We suggested the management technique using BIM in construction projects for productivity improvement by showing such a result.

5. Construction of A Large section Shield Tunnel under the steep gradient, the sharp curve and the shallow overburden at the urban area ~Baba Ramps of Yokohama North Line~


  • Metropolitan Expressway Co., Ltd.
  • Shimizu Corp. and Tokyu Construction Co., Ltd. Joint Venture

This is four shield tunnels construction project to provide new ramps to the main line tunnel of Yokohama North Line which opened in 2017. The specific conditions are the steep gradient, the sharp curve, the shallow overburden, and the small separation at the connection between the ramps and main tunnel. Several measures were taken toward those difficulties such as followings, well-considered construction and machine plan and the construction management reflecting simultaneous measurements of adjacent buildings in real-time. Finally, four ramps were completed safely without environmental influence. The technic and execution under above severe conditions is remarkable and contributes to the infrastructure development in Japan.

6. The unparalleled large and rectangular shield construction in times past under the conditions of soft ground and shallow earth covering -The Toranomon underground passage construction work -


  • Mori Building Co., Ltd.
  • Metro Development Co., Ltd.
  • OBAYASHI Corp.

As Tokyo 2020 Olympic Games approaches, many urban transportation projects are underway to improve international competitiveness and convenience for inbound tourists. One of those is Tokyo Metro’s construction of Toranomon Hills Station, a new station on the Hibiya Line, an operating line. The new station is located near Toranomon Station on the Ginza Line. To facilitate transfers between Toranomon Hills and Toranomon Stations, an underground passageway is being constructed using shield tunnel method. Under the distinct conditions of soft ground, shallow earth covering, and rectangular shield, ground surface settlement and impact to underground facilities and adjacent buildings was successfully minimized, and construction work was performed safety and with high precision. These achievements are the technology of controlling an environmental impact and constructing the underground passage on severe conditions.

7. Large-scale under pinning technology and match for process reduction in intersection falling plumb down in front of the station -Sotetsu Tokyu through track Shin'yokohama station subway intersection construction-


  • Japan Railway Construction, Transport and Technology Agency(JRTT)
  • Transportation Bureau, City of Yokohama
  • Kajima-Tekken-Fudo Tetra-NB Corp. Joint Venture

Established Shin'yokohama station chooses as an under pinning falling plumb down in Yokohama Municipal Subway Shin'yokohama station, and, temporary, receive and a new station is built in cut and cover tunneling method. Safety and the thing which "makes the under pinning certain and makes the station under the station" were achieved by nomogram management and visualization using a CIM. Make achieve a large-scale under pinning by main road intersection falling plumb down, precedence is temporary by tunnel excavation, receive fusion of a high tech for process reduction contributed to urban area construction technology development.

8. Yamba Dam Construction ~High-speed construction of a dam with a dike volume of 1 million m3 and store about 75 million m3 of Typhoon 19 floods~


  • Yamba Dam Construction Office, Kanto Regonal Develpment Bureau, Ministry of Land, Infrastructure, Transport and Tourism
  • Shimzu, Tekken, IHI Construction Joint Ventures
  • Nippon Koei Co., Ltd.

Yamba Dam is a 107,500,000m3 gravity concrete multipurpose dam built in the Azuma River, Gunma, Japan. The construction project was very important for flood control, and early completion was strongly desired. By expanding the equipment, adopting cruise RCD method, using precast concrete, devising the method of installing discharge facilities, and casting in winter, construction efficiency and safety was improved, and the construction process was shortened. Last October, during the great Typhoon 19 that hit Japan, the dam demonstrated its great storage capacity and effectiveness. It is expected that technology adopted in this project will be useful and helpful in future dam construction.

9. Construction of Japan's largest spillway tunnel bypassing an operating dam ~Kanogawa Dam Tunnel Spillway~


  • Yamatozaka Dam Construction Office, Shikoku Regional Develpmen Bureau, Ministry of Land, Infrastructure, Transport and Tourism
  • Shimizu-Hazama Ando Specified Construction Joint Venture

The Kanogawa Dam Tunnel Spillway Construction Project is the first work in Japan to construct a spillway tunnel bypassing an operating dam. This is a difficult construction work that has never been before, such as the largest hydraulic tunnel in Japan that can discharge up to 1,000 m3/s, and the joining of a large tunnel to a SPSP shaft under the deep water. For this reason, a lot of measures were taken, including the development of the LIBRA-S method, the 3D-FEM analysis of large-section tunnel junctions, and the stepwise additional injection of water stoppage. With the implementation of these countermeasures, the construction was completed successfully and operation has started, contributing to the safety of the Hijikawa basin. It was also highly evaluated for its contribution to the development of dam renewal projects, and was deemed to be worthy of the Technology Award.

10. The world’s first, Spiral Excavation of tunneling by Horizontal & Vertical Variation Shield Method–


  • Bureau of Sewerage, Tokyo Metropolitan Government
  • Shimizu Corp.

In this project, the H&V Variation Shield Method was adopted to secure the maximum flow rate in the limited occupied space, and two spiral tunnels could be constructed. The spiral excavation of the central part of the tunnel on one side of the tunnel was extremely difficult and it was the world’s first. Therefore, we conducted a detailed analysis for verification of the attitude control of the shield machine, and it’s completed the highly difficult work by making full use of many new technologies. This achievement was highly evaluated as a major contribution to the development of shield technology, and it was worthy of the Technology Award.

11. i-Construction promotion accelerated by ICT implementation for rock fill dam construction -Oitagawa Dam Construction Project-


  • Kyushu Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism
  • Kajima Corp., Takenaka Civil Engineering & Construction Co., Ltd., Sumitomo Mitsui Construction Co., Ltd. Construction Joint Venture

Oitagawa dam is the first multipurpose rockfill dam in the Kyushu Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism. The ministry launched i-Construction policy to improve productivity by ICT in all construction production processes. The Kyushu bureau pioneeringly conducted CIM trials at four dams through different progress stages. At Oitagawa dam under construction stage, ICT was independently developed and improved in each step of survey, plan, construction, inspection and management, resulting in quality assurance achievements and dramatic improvements in productivity and safety. Furthermore, huge construction data obtained at each stage is applied to maintenance through CIM.



1. Economic Cooperation and Infrastructure Export by Comprehensive Utilization of Japanese Costal Technology ~Lach Huyen International Port Construction Project~


  • Ministry of Transport, Socialist Repubic of Vietnam
  • Japan International Cooperation Agency (JICA)
  • Ports and Harbours Bureau, Ministry of Land, Infrastructure, Transport and Tourism
  • Nippon Koei Co., Ltd.
  • Japan Port Consultant Ltd.
  • Oriental Consultants Co., Ltd.
  • PADECO Co., Ltd.
  • Rinkai Nissan Construction Co., Ltd.
  • Hai Phong International Container Terminal Co., Ltd.

Lach Huyen International Port was constructed under the Japanese ODA loan at offshore of the Lach Huyen area situated in south east part of Hai Phong City to meet increasing cargo volume and deployment of large size vessels in the marine transport sector. The construction period was from 2013 to 2019 after a series of JICA studies (Preparatory Survey (2009~ 2010), Detailed Design (2011~ 2013)). This project is the first Public- Private Partnership (PPP) project between the two governments, defining the role of public and private entities and Special Terms for Economic Partnership (STEP) was introduced, applying Japanese advanced technology in consideration of the aspects of the environment and safety.

2. Port-urban design in Miyajimaguchi ~Formation of Regional hub for Inbound tourism in rural areas~


  • Public Works and Construction Bureau, Hiroshima Prefectural Government
  • Construction Department , Hatsukaichi City

In this project, Hiroshima Prefecture and Hatsukaichi City collaborated to develop a passenger terminal with a function as a wide-area tourist base at the gateway to the World Heritage. The first feature and novelty is "Construction of the largest floating pier in Japan (84m x 30m) with a large roof used by a large number of tourists." The second one is “Port development integrated with town development”. With these efforts, a new passenger terminal was completed on February 29, 2020. In this way, this project contributed to the sustainable development of local cities, and was evaluated as a model case of Port- urban design utilizing civil engineering technology in Japan, and was recognized to be worth the Technology Award.

3. Restoration and reconstruction of the JR Joban Line damaged by the Great East Japan Earthquake (Efforts for railway restoration under high dose of radiation and reconstruction in cooperation with local governments)


  • East Japan Railway Company

After the Great East Japan Earthquake 2011, various decontamination measures were taken between Hirono Station and Haranomachi Station of the JR Joban Line depending on the radiation dose level to lower the value below 3.8 μSv/h, the standard value for lifting evacuation orders. As a result, the JR Joban Line was resumed in all lines in March 2020. Community development projects were also included in the earthquake disaster reconstruction, such as construction of a new station and an over bridge for road traffic. Considering that the area under evacuation orders still remains along the railway line even after resuming operation, measures were taken to prevent passengers from being stuck between stations, such as installation of animal intrusion prevention fences, windbreak fences and evacuation roads, and cutting down trees.

4. Redevelopment of Shinagawa Station (Improvement of Railway Yard, Construction of Takanawa Gateway Station)


  • East Japan Railway Company, Tokyo Construction Office

Shinagawa Station Redevelopment Project is a project creating a large-scale land (approximately 13 ha) by means of reorganizing and consolidating Shinagawa Railway Yard which had not been used effectively for the recent few decades, as well as constructing Takanawa Gateway Station, the first new station to be opened in 49 years on the Yamanote Line. This project was a breakthrough project that not only improved the efficiency of railway facilities but also developed surrounding area such as enhancing social infrastructure, strengthening the function of transport connections, etc. This project was recognized with the Technical Award.

5. Construction of Jakarta Mass rapid Transit Protect Phase 1 (First-time Oversea Railway Project including Master Plan, Feasibility Study, Basic Design, Tender Assistance Services, Construction and O&M Services by All Japan)


  • (Employer)PT. MRT JAKARTA,(Lender)Japan International Cooperation Agency, (Authority)Ministry of Land, Infrastructure, Transport and Tourism,(Master Plan)Oriental Consultants Global Co., Ltd., Almec Corporation,(Basic Design)Nippon Koei Co., Ltd., Chodai Co., Ltd., Japan Electrical Consulting Co., Ltd., Koken Architects, INC. JV, (Construction Management Consulting Services) Oriental Consultants Global Co., Ltd., Japan International Consultants Co., Ltd., Pacific Consultants Co., Ltd. JV,(Management Services)PADECO Co., Ltd., Oriental Consultants Global Co., Ltd. JV, (O&M Services)Japan International Consultants Co., Ltd., Nippon Koei Co.,Ltd., Oriental Consultants Global Co., Ltd., PADECO Co., Ltd. JV,(CP101&102 Contractor)Tokyu Construction Co., Ltd. JO,(CP103 Contractor)Obayashi Corporation, Shimizu Corporation JV,(CP104&105 Contractor)Shimizu Corporation, Obayashi Corporation JV,(CP106 Contractor)Sumitomo Mitsui Construction Co., Ltd. JV,(CP107 Contractor)Mitsui & Co., Ltd., Kobe Steel, Ltd., Toyo Engineering Corporation,(CP108 Contractor)Sumitomo Corporation, Nippon Sharyo, Ltd.

Jakarta Mass Rapid Transit Phase 1 project is the First Mass rapid Transit System in Indonesia between Central Jakarta and South Jakarta with 15.7km length. With the commencement of the commercial train operation, the travel time that took more than 2 hours before during traffic congestion has been reduced to about 30 minutes, which has significantly changed the lives of citizens, and has promoted development and redevelopment as Transit Oriented Development including revitalization of commercial areas along MRT corridor. This Project has been implemented through Japanese Official Development Assistance Loan by Japanese Government and Private Company by all Japan as First Completed High Quality Japanese Infrastructure Exports.

6. The construction of Eastern Kanagawa Line (Sotetsu–JR through Line) -The first project based on “the Act on Enhancement of Convenience of Urban Railways, etc." with effective use of railway stocks-


  • Japan Railway Construction, Transport and Technology Agency
  • Sagami Railway Co., Ltd.
  • East Japan Railway Company

Eastern Kanagawa Line (Sotetsu–JR through Line) is developed as a rail link between two existing railways, Sotetsu Lines which run in the western district of Yokohama city and the central part of Kanagawa prefecture, and JR Tokaido freight Line. This project showed three excellent achievements: 1) drastic improvement of the mobility with small investment based on the new transportation policy and planning, 2) advancement of civil engineering technology, and 3) social impact of the project. After opening this line, the travel time from Sotetsu-Futamatagawa station to JR-Shinjuku station decreases from 59 minutes to 44 minutes without transfer at Yokohama station.

7. Restoration from the disaster caused by tanker collision -Kansai International Airport Access Bridge-


  • West Nippon Expressway Co., Ltd.

Kansai International Airport Access Bridge connects the offshore airport with the main island, which was badly damaged after being hit by a tanker set loose in a typhoon in September 2018. Utilizing a part of undamaged bridge enabled one-side alternate passage on the day following the accident and two-way traffic three days later. With various technical improvements, NEXCO-West installed girders five months after the accident and completed the restoration work seven months later. Therefore, an early recovery as well as a quick initial response to a disaster that happens to important infrastructure contributed significantly to society, which is worthy of the Award.

8. East-West Road Improvement Project (N-70), Pakistan


  • Japan International Cooperation Agency
  • National Highway Authority, Pakistan
  • CTI Engineering International Co., Ltd.
  • Taisei Corporation

The project enhances traffic capacity of existing national highway of N70 with a length of approximately 11km in mountainous area in Pakistan. “Steel Box Girder Bridges” as well as “Pre-fabricated Steel Widening Bridge” have been newly constructed at steep slope in order to widen the existing road and revise the road alignment to make the two opposite traffic passing possible. Resilience against natural disasters including a heavy rain has been also established as a result of constructing watercourse and rockfall protection wall. The project significantly offered the Japanese state-of-the-art construction techniques and implemented materials such as “atmospheric-corrosion resistant steel” for viaduct construction and “epoxy coated and filled strand” for ground anchor work in order to minimize the future cost for maintenance. The work at site was successfully completed in 2019 and expectation is placed on the solid economic growth in Pakistan.

9. Decontamination of radioactive materials from the Fukushima Daiichi Nuclear Power Plant accident


  • Fukushima Regional Environmental Office, Ministry of Environment, Japan
  • 39 General Contractors in Japan

Radioactive materials were diffused due to the accident at a nuclear power plant by the Great East Japan Earthquake and tsunami at March 11, 2011. There was an urgent need to ensure the safety of residents and reduce the radioactive pollution. This project was an unprecedented effort to implement wide area decontamination. At the beginning of the project, there was little knowledge of radioactive materials removal techniques. The decontamination methods had thus been developed and applied through a trial and error process by the government and general contractors. Based on the above, this project is evaluated as “contribution to the newly developed civil engineering technology and the enormous contribution of engineers and further development of the civil engineering technology," and it is evaluated as a technology award.

10. Nagayasuguchi Dam Upgrading Project ~Front Runner-


  • Shikoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism

Nagayasuguchi Dam Upgrading Project is one of the largest upgrading projects in Japan. It was a quite difficult and unprecedented project as the embankment of the dam in operation was needed to cut to newly construct spillway gates and an energy dissipator structure without lowering water level. In addition, several challenging technological developments, such as the installation of huge gates to ensure reliable cutoff performance and the adoption of a new energy dissipation method for the energy dissipator structure, were implemented for the first time in Japan, resulting in the huge achievements of both technology development and cost reduction.

11. The Construction of Osaka Higashi Line ~the improvement of railway network in Kansai area~


  • West Japan Railway Company
  • Osaka Soto-kanjo Railway Co.,Ltd.
  • Osaka Prefecture
  • Osaka city
  • Suita city
  • Higashiosaka city
  • Yao city

Osaka Higashi Line is a railway from Kyuhoji Station of Yamatoji line to Shin-Osaka Station of Tokaido line. By opening this line, Transfer passengers between the existing railways become convenient, an accessibility to the Shinkansen becomes improved, and the mobility between Osaka and Nara are enriched. Therefore, Osaka Higashi Line contributes to the improvement of the railway network in Kansai area and regional activation. This line is built by the utilization of the old structures of Joto freight Line. This effort is effective for the reduction of the environmental load and the extention of life of the structures.

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