2024 Innovative Technique Award
1. Development of Mixed Structural Foundation using
Steel Segment Press-Fit Method（Urban-Foundation® Method）
- Yuto Ohba（JFE Steel Corporation）
- Kaoru Matsuoka（JFE Metal Products Corporation）
- Osamu Ishizaka
The Urban-foundation method is a new technology to construct a foundation using the Urban-ring method to construct a shaft by press-fitting steel segments. The feature is that by rigidly improving the circumferential joint of the steel segment, the steel segment functions with the constraint body of the internal concrete, and the hoop can be reduced.
2. Development of rapid deck slab renewal system (Smart Deck Renewal (SDR) System®)
- Hiroyuki Yamanaka (Kajima Corporation)
- Takahiro Arai (Kajima Corporation)
- Keiji Mimuro (Kajima Corporation)
- Hirokazu Fuchisaki (Kajima Corporation)
- Toshimichi Ichinomiya (Kajima Corporation)
For road bridge renewal, it is highly requested to minimize social losses, such as restriction of existing traffic, derived by the work implementation. To comply to the request, we developed innovative SDR system ® which turns the deck slab renewal work site to “mobile factory”
3. Upgrading of Road Bridge Decks using Very High Strength Fiber Reinforced Cementitious Composites (VFC)
- Yuji Watanabe (Kajima Corporation）
- Shuji Yanai (Kajima Corporation）
- Toshimichi Ichinomiya (Kajima Corporation）
- Tohru Makita (Central Nippon Expressway Company Limited)
- Dai Wakabayashi(Central Nippon Expressway Company Limited)
- Makoto Muranaka(Central Nippon Expressway Company Limited)
The present technology makes it possible to improve the load-bearing capacity and durability of road bridge decks without changing the deck thickness by placing a thin overlay of Very high strength Fiber reinforced Cementitious composites (VFC), which have excellent tensile properties and very low permeability.
4. Streamlining Quality Control Operations and Realizing Total Quality Management in the Construction of Trapezoidal CSG Dams through Advanced Sensing Technology Utilization
- Shoji Sato
- Michitaka Okamoto
- Takaya Matsumoto
- Atsushi Oi
- Hiroaki Kobayashi
- Keisuke Tanaka
Through the development of the "Surface Water Quantity Management System" and the "Field Density Measurement System (Geo-DX Compaction)," we have achieved labor-saving and improved productivity of quality control in the construction of trapezoidal CSG dams.
5. Development of the new road slab replacement machine and methodology for expressway renewal projects
- Hideto Morita (Taisei Corporation)
- Yuji Hayashi (Taisei Corporation)
- Kohei Furukawa (Taisei Corporation)
- Tatsuo Shintaku (Taisei Corporation)
- Toshiaki Shirai (Taisei Corporation)
- Hitoshi Takeda (Taisei Corporation)
In order to address this problem, we have developed the new methodology consisting of the new road slab replacement machine and the slob jointing system. This development improves the workability of construction, shortens the construction period and avoid traffic restrictions during replacement works in weekends.
6. Development of high-durability and environmentally friendly concrete manufacturing technology (e-CON) for cement-less precast concrete products.
- Satoshi Tanaka (Nippon Hume Co.)
- Minoru Hata (Nippon Hume Co.)
- Makoto Sato (Tokyo metropolitan Sewerage service Co.)
A cementless concrete (e-CON) for precast products has been developed. The main raw materials of e-CON's binder consist of industrial by-products such as ground granulated blast furnace slag, fly ash, and silica fume. Furthermore, by using e-CON, it is possible to reduce CO2 emissions in the manufacture of precast products by approximately 80% compared to the use of conventional cement
7. Development of a bridge deck overlay method using ultra-fast hardening UHPFRC (Stiff-crete)
- Takayoshi Tomii (Obayashi Road Corporation)
- Shunji Aoki (Obayashi Road Corporation)
- Kazunari Sasaki (Obayashi Road Corporation)
- Jun Homma (Obayashi Road Corporation)
- Koji Tamataki (Mitsubishi UBE corporation)
Ultra-fast hardening UHPFRC (Stiff-crete) has been developed as a material that can be used to overlay existing bridge decks, improving the durability of existing slabs and preventing re-degradation. Stiff-crete is applicable for a sloped surface and can enable early opening to traffic.
8. Development of concrete quality monitoring system during concrete placement
- Tsutomu Yamada
- Shinji Ninomiya
- Yuji Umino
- Akihiro Kanazawa
- Takeshi Iyoda
To Prevent void generation at the upper part of the crown area in a tunnel lining, we devised an innovative sensor to detect concrete filling and compaction along the length of the crown area. This sensor features a long, thin sheet on which multiple detection components and associated wires are placed.
9. Development of Fully Automated Shield Driving Technology -Integrated system of “Directional Control Technology” and “Face Stability Control Technology”
- Takeda Atsushi
- Hayashi Masataka
- Nakamoto Atsushi
- Ebara Masahiro
- Soma Kanami
"Fully Automated Shield Driving Technology" is a system that integrates direction control technology and face stability control technology.
The direction control technology consists of underground automatic surveying technology.
