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2018 Outstanding Civil Engineering Achievement Award


1. New technologies for long-distance, large-diameter and close-proximity shield tunnels - The shield tunnel project of Yamatogawa route, Hanshin Expressway -


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

The shield tunnel of the Yamatogawa route is an urban highway tunnel constructed along the alignment of Yamatogawa river. The features are; * Long distance propulsion (about 4km by return) and super close proximity (less than 1m between the both of tunnels).* Large cross section (outside diameter of segments, D=12.23m).* Reduce cycle time of building shield tunnel structures.* Develop & apply the automatic roundness measurement system for high precision & quality.* Apply seismic response control tunnel segments. Through those new developing technologies above and various approaches, new tunnel engineering technologies for the next generation could be established.

2. Development of a Highly Seismic Resistant Pile Bent Pier and Rapid Construction of a Detour Viaduct by Full Precasting : Renewal Project of the Higashi-Shinagawa Pier Section and Samezu Reclamation Area in the Route 1 Haneda Line of the Metropolitan Expressway


  • Metropolitan Expressway Co. Ltd.

At the Higashi-Shinagawa pier section and Samezu reclamation area in the Route 1 Haneda Line of the Metropolitan Expressway, a large-scale renewal project has been carried out. The inbound lane has to be diverted to a detour and the renewal inbound lane will be operated temporarily as an outbound lane. To welcome the Tokyo Olympics 2020 with this new construction, as to the 1.9km long detour, it was necessary to overcome the structural and process limitations, such as securing earthquake resistance, keeping a traffic line under the detour and completing the construction for 16 months. Therefore, by installing the steel pipe pile in a two-row arrangement and placing the precasting pier cap on the pile head, a highly seismic resistant pile bent pier structure that ensures load-bearing capacity for level II earthquake has been newly developed. Furthermore, the design and construction of the structure were standardized, and the 1.9km long detour viaduct was completed with an unprecedented rapid construction time of approximately 16 months.

3. Expansion and Joining Works of Shield Tunnel by Using Artificial Ground Freezing which is One of the Largest Scales in Domestic Sewerage Projects -Sumidagawa Sewer Trunk Line-


  • Bureau of Sewerage Tokyo Metropolitan Government
  • Tokyu Construction Co., Ltd.

Sumidagawa Sewer Trunk Line consists of two rain-water drainage tunnels; one has outer diameter of 5.5m and length of 3.11km, and the other one has 6.35m and 260m. shield tunnel expansion work was required for joining the two tunnels. In this work, we formed a frozen soil wall of 3,700m3 which is one of the largest scales in domestic, and expanded the existing tunnel from 5.5m to 9.5m in outer diameter. Furthermore, in the joining work, we succeeded to reach TBM into the expanded tunnel by using an entrance device without refreezing. As a result, this achievement of having accomplished the above unprecedented works was highly evaluated as a great contribution for the other projects in the future.

4. The innovation of railway track monitoring and the applications


  • East Japan Railway Company
  • Japan Railway Track Technology Consultants Co., Ltd.
  • Railway Technical Research Institute
  • Kawasaki Heavy Industries, Ltd.
  • Hitachi High-Tech Fine Systems Corp.
  • JR East Information Systems Company

We developed the railway track monitoring systems and implemented those technologies, which is the first realization in Japan. The devices mounted on the passenger trains provide track engineers with the useful data of geometry and materials from a distance. We also achieved significant results with respect to data analysis and elaborate management process of track maintenance such as inspection, decision, and evaluation of interventions. The innovation will pave the way for more effective track maintenance and has enormous potential to contribute to improvement of productivity in other railway business operators.

5. Construction and Operation of the worldwide largest frozen soil wall for the Land-side Impermeable Wall at the decommissioning site of Fukushima Daiichi Nuclear Power Station


  • Tokyo Electric Power Company Holdings, INC.
  • Kajima Corp.

In the Fukushima Daiichi Nuclear Power Station, a large-scale rectangular artificial frozen soil wall was installed to prevent the groundwater from inflowing into the contaminated area of the damaged facilities. Many advanced construction technologies were developed for the artificial frozen soil wall, including long-term frozen soil maintenance methods, ground temperature management methods and rapid frozen soil development methods. The rectangular artificial frozen soil wall and other measures significantly reduced the production of contaminated water. The developed technologies can be applied to the construction of other general civil works. The project, therefore, contributed to an advancement of civil engineering technology

6. The technologies about construction method of railroad viaducts using local aggregates within effective ASR suppression measures -the construction project of continuous railroad viaducts near Niigata Station-


  • East Japan Railway Co., Ltd. Jyoshinetsu Construction Office
  • Niigata Ready Mixed Concrete Cooperatives
  • Taisei-Dai Nippon Construction Joint Venture
  • Tekken-Maeda-Toa-Kagata Joint Venture
  • Kajima-Nishimatsu-Fukuda Joint Venture
  • Daiichi Kensetsu Co., Ltd.Niigata Branch
  • Totetsu Kogyo Co., Ltd.Niigata Branch Niigata Railroad Construction Site

“Around Niigata station, we planned to construct new railroad viaducts for the purpose of approving regional activation by removing the railroad crossings. These new railroad viaducts are constructing with about 110,000 m3 volume concrete. On the other hand, it is difficult for us to get low ASR reactive aggregates in Niigata area. Then we considered to use fly-ash as ASR suppression measure. The following efforts were carried out. 1) Tests on ASR suppressing combination of concrete with fly ash, 2) Preparation of supply system of the concrete, 3)Establishment on construction method of high quality concrete. As a result, the project was carried out successfully by adopting these technologies.

7.Labor/manpower-saving for construction of the “Large section Box Calvert” by the “Hybrid Half Pre-casting Method”: at the A-ramps for turn off of Keiyo Junction in Tokyo-Gaikan Expressway


  • Chiba construction office, Kanto Regional Head Office, East Nippon Expressway Co., Ltd.
  • Specific corporation fixed type JV by SHIMIZU Corp., MAEDA Corp. and TOYO CONSTRUCTION Co., Ltd.

We had applied accomplishment of the "Hybrid Half Pre-casting Method” to side wall of the box culvert at the A-ramps, KEIYO-junction in TOKYO-GAIKAN EXPRESSWAY. The method is to construct half pre-casting components by connecting the RC panels embedded with reinforcing steel in shear reinforcement steel plate. This is integrally formed with RC parts by concrete placement after installation of the parts in the box culvert. This structure reduces construction weight by 1/4 and improves installation efficiency compared to conventional “Full Pre-casting” method. As a result, we succeeded in reducing labor to 80% and shortening the box culvert construction period to 70% in actual operation compared to the case of cast-in-place concrete.

8. Streamlined Efforts Made by Precsastinization and Mechanization in Construction Work for Improving Kachidoki Station on the Toei Oedo Line


  • The Bureau of Transportation, Tokyo Metropolitan Government
  • Joint Venture Construction of Taisei Corp. & Sato Kogyo Co., Ltd & Daiho Corp.

Since Kachidoki station opened for business in 2000, redevelopments have been carried out in the area. In parallel with a rising needs, the number of passengers using Kachidoki station now surpassed around 100,000 a day, which is three times as originally expected. This project aimed to improve the mundane congestion and usability of the station by establishing a station platform and subway concourse while it maintains train service. Although construction work was required to be completed in time for the 2020 Tokyo Olympics, acquired ingenuity achieved both a shortening of construction time and safe, eco-friendly construction, contributing to the further development of civil engineering technology on improvement work of the station.

9.The challenge to meet the commencing date of an extremely large-scale open-cut highway tunnel, including complex structures that intersect with various infrastructures -Tokyo-Gaikan Expressway Ichikawa-naka Construction- –


  • East Nippon Expressway Co., Ltd.
  • Kajima-Obayashi-Tekken Joint Venture for Specific Construction Project
  • Pacific Consultants Co., Ltd.

Tokyo-Gaikan Expressway Ichikawa-naka Construction is a project to construct a semi-underground structured tunnel for the length of 1.5km for both an expressway and the National Route 298, in Ichikawa, Chiba Prefecture. The construction was extremely challenging because of the complex tunnel structures intersecting with various infrastructures, which required high leveled technology. The opening schedule for the expressway was maintained by conducting the bold and detailed planning, design, and construction, with using the methods such as 1) underpinning the first-class river with a temporary steel diversion channel, 2) underpinning the high occupied roads with a rigid steel pipes achieving the non-open-cut for a large-section tunnel, and 3) adopting the prefabrication of a steel-concrete composite structured tunnel. These efforts succeeded to solve several complicated problems, accomplished the factory process in construction, and improved the productivity and the safety.

10. Large-scale construction projects of railroad switch in Terminal Station which overcomes extremely complicated and difficult constraints conditions (A 46-hour continuous work by stopping trains – The first railroad switch of JR Shibuya Station Improvement Project)–


  • East Japan Railway Company Tokyo Construction Office
  • MLIT Tokyo National Highway Office
  • Kajima Corp., Simizu Corp., Construction Joint Venture
  • Tekken Corp.,Tokyu Corp., Totetsu Corp., Construction Joint Venture
  • Kotsu Corp., Tokyo Branch, Shinjuku No.2 Construction Office
  • JR East Consultants Company

In JR Shibuya Station Improvement Project, 4 times of railroad switch are planned to relocate the Saikyo Line Platform about 350 meters, parallelizing with the Yamanote Line Platform, as well as to make the Yamanote Line Platform an island platform. Under extremely severe constraints, the first railroad switch was successfully completed as the result of mechanized track construction, raising platform by Expanded Polystyrene, weight reduction of existing girder by pre-work, moving and setting new track girder by self-propelled cart automatically moving along track, identification and management of risks assuming unforeseen situations, and precaution by various test constructions.

11. Large diameter cast-in-place pile construction beneath live railway track in terminal station (Chiba Station Improvement, and Station Building Rebuilding Project)


  • East Japan Railway Company Tokyo Construction Office
  • Taisei Corp.
  • Tekken Corp.
  • JR East Consultants Company

In Chiba Station, which is the main terminal station of Chiba Prefecture, an artificial ground above the station building and rebuilding of station buildings are planned to solve various problems such as aging of the station, as well as to improve customer’s flow line and visibility. Two types of piling method (Cast-in-Place Piling with Borehole Wall Protection, and Very Low Overhead Clearance Cast-in-Place Piling Method), which overcome specific restrictions of station improvement work, were newly developed and applied to build large-scale pile due to long span of artificial ground column. These methods are also considered to apply to similar projects.



1. "Gulf Breakwater’s Recovery Project from Disaster(Kamaishi・Ofunato)


  • Ministry of Land, Infrastructure, Transport and Tourism Tohoku Regional Development Bureau Kamaishi Port Office

The gulf breakwater of Kamaishi Port and Ofunato Port, which were devastatingly damaged by the Great East Japan Earthquake, have been restored to secure the port function and the protection function of the central city area from the tsunami. We conducted the new technical study for disaster recovery, and for the largest class of tsunami (L2), we adopted a “Resillient structure” that satisfies the repairability and safety. In addition, the multiple protection by combining the breakwater and the seawall was set to the optimum height by cost comparison based on the regional characteristics, and was adopted in the initial design of Kamaishi Port and also adopted in the disaster recovery of Ofunato Port.

2. Gokayama Dam Construction Project - Challenge the dam construction with the aim of improving productivity with the latest civil engineering technology-


  • Fukuoka Prefecture

Gogayama Dam is planned in the wake of the severe drought in 1959, when it hit the Fukuoka urban area. In the event of a severe drought, Water will be provided by the dam for emergency use in order to minimize the impact of the drought on people’s life. The cruising RCD method adopted to construct Gokayama Dam has been developed to aim for even more rationalizing dam concrete placing. The project contributed to the sustainable development of the Fukuoka urban area, as well as to the development of dam construction technology and the development of local communities in water sources.".

3. Construction of the Ishikariwan Shinko Thermal Power Station Unit 1 -Achievement of shortening construction process in severe winter weather and sea conditions, and reduction of environmental load ,adopting new technologies-


  • Hokkaido Electric Power Co., Inc.(HEPCO)

HEPCO has constructed the Ishikariwan Shinko Power Station, its first LNG-fired thermal power plant, and the above-ground LNG storage tank in the Ishikariwan Shinko Area, Hokkaido, to secure a stable power supply for the future. In the construction of water outlet facilities, new civil engineering technologies, such as Submerged Steel-Pipe-Pile Well Method, Inclined-braceless Excavation Support, have been adopted to overcome unique problems under severe winter weather and sea conditions, and keep commercial operation on schedule by shortening construction process proactively. Moreover, it is for the first time in Japan to use fly ash at about 30% of the cement for the base slab and the dike concrete of the above-ground LNG storage tank with the aim of preventing thermal cracking and reduction of environmental load. This achievement is recognized for significant contribution to the development of civil engineering as advanced cases of same type of construction.

4. The Tokyo Outer Ring Road Project between Misato-Minami IC to Koya JCT


  • ① Shuto National Highway Office, Kanto Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism City
  • ② Saitama Construction Office, Kanto Branch, East Nippon Expressway Company City
  • ③ Chiba Construction Office, Kanto Branch, East Nippon Expressway Company

The construction project of the Tokyo Outer Ring Road between Misato-Minami and Koya is implemented by the East Nippon Expressway Company and the Ministry of Land, Infrastructure, Transport and Tourism. The project is located in the high density urban areas, and it has taken more than a half century because of the following difficulties; ・Formulation consensus with related organizations and negotiation with a lot of landowners (3,000 properties) ・The technical difficulty due to crossing many important infrastructure (6 railways, Roads, River) ・Construction of semi-underground structures of 10 km in total length under high level of groundwater This expressway contributes economic activities, improvement of traffic congestion in Tokyo metropolitan area, and the development of civil engineering technology in urban areas.

5.Construction and investigation project of underground research laboratory for high level radioactive waste disposal in Sedimentary host rock (Horonobe URL project)


  • Japan Atomic Energy Agency
  • Taisei-Obayashi-Sumitomo Mitsui Joint venture

The Horonobe Underground Research Laboratory (URL) Project has being pursued by Japan Atomic Energy Agency to enhance the reliability of relevant disposal technologies through investigations of the deep geological environment within the host sedimentary formation at Horonobe, northern Hokkaido. The URL Project consists of two major research areas, “Geoscientific Research” and “Research and Development on Geological Disposal Technologies”, and proceeds in three overlapping phases, “Phase I: Surface-based investigations”, “Phase II: Investigations during tunnel excavation” and “Phase III: Investigations in the underground facilities”, over a period of around 20 years. Phase III investigation was started in 2010 fiscal year.

6. The JR Yamada Line Damaged by Tsunami Rebuilt from Miyako to Kamaishi - Rebuilt According with the Urban Planning -


  • East Japan Railway Company
  • Sanriku Railway Company
  • Ministry of Land, Infrastructure, Transport and Tourism
  • Iwate Prefectural Government
  • Miyako City Government
  • Yamada Town Government
  • Otsuchi Town Government
  • Kamaishi City Government

The JR Yamada Line was decided to be rebuilt from Miyako to Kamaishi for 2019 Rugby World Cup through reconstruction conference for about 4 years. In 55.4km rebuilt area, several business operators promoted massive scale of the urban planning. Especially, river bridges were rebuilt by utilizing effective railway construction technology. The work has achieved rebuilt construction with the urban planning only 4 years. Moreover, related business operators made good friendships to become and promote sustainable local transportation. As a result, the work has contributed to the further development of civil engineering technology and the local communities.

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