東王技研 List of Products and Services

Tōō Kingiken Co., Ltd. has decided to develop and provide the wooden frame method covering "VELS," which improves the structure and workability of traditional flood control methods. This initiative aims to effectively utilize thinned timber from cedar and larch produced during forest management across the country, revitalizing the forestry industry. Additionally, it addresses the promotion of the reuse of concrete debris from construction by reducing costs for public works, while also considering recent issues such as waterfront environments. For more details, please contact us or refer to the catalog.

• Special Construction Method

Traditionally, the foundation works for revetments and vertical/horizontal band works were carried out using on-site concrete pouring methods with formwork assembly. However, Toho Giken Co., Ltd. has developed and popularized precast concrete products as a labor-saving method, which are widely used as slope protection and small stop blocks. However, in methods that use water-stopping sheet piles, the increase in width of the sheet piles leads to larger web dimensions, and blocks corresponding to II-W, III-W, and IV-W type water-stopping sheet piles face issues in manufacturing costs and construction due to the increase in product dimensions and the complexity of the formwork structure. The "VE Panel" proposed by Toho Giken Co., Ltd. for slope protection foundations and small stop uses a residual steel plate frame, which can accommodate various slope gradients and specifications/dimensions. It is made from high corrosion-resistant galvanized steel plates (manufactured by Nippon Steel Corporation, Super Dima) that are processed in the factory, allowing for an assembly and installation method on-site that only requires pouring of infill concrete, eliminating the need for dismantling. For more details, please contact us or refer to the catalog.

• Special Construction Method

Currently, on Earth, the emissions of greenhouse gases due to massive energy consumption are increasing, and global warming is progressing at a pace far beyond expectations. The impacts on ecosystems and climate change, such as increased evaporation and drought areas, indicate that the future world will face intensified natural disasters and severe water shortages, with extremely serious consequences for human society. An urgent message has been issued by scientists calling for immediate action towards climate stabilization worldwide. It has been pointed out that Japanese people have historically taken water and safety for granted, reflecting a lack of awareness and sense of crisis. Our country, located in a region of heavy rainfall and high humidity, has long enjoyed abundant rainfall and clean water resources, living in a "safe society." Now is the time to re-recognize the spirit and teachings of our ancestors regarding "waste not, a single drop of water," and to effectively utilize the precious natural resource of "rainwater" that remains in our country. Each individual has a significant responsibility to start taking action from familiar matters to realize a "low-carbon society" and leave a beautiful Earth environment for future generations. For more details, please contact us or refer to the catalog.

• Flood prevention facilities, fire tanks, and flood control ponds

"Fessel G II" creates a stable vegetative cover foundation by preventing the sliding and flow of covered soil through its vertical and horizontal protrusion structures on the block surface. The rib-like protrusion structure enhances the strength of the block itself. The blocks are enlarged to 0.8 pieces/m², which reduces construction labor and costs through decreased work rates and labor-saving measures, and allows for high-quality revetment design and planning through the verification of mechanical stability. For more details, please contact us or refer to the catalog.

• Airport facilities
• River construction

The TG-style parapet wall features a structure divided into L-shaped main body blocks and beam-shaped foundation blocks, with the gap between the toe of the breast wall and the slope protection filled with cast-in-place concrete. This design enhances the waterproofing function to prevent damage to the embankment from water infiltration. When the blocks are integrated into a single structure, the complexity of the formwork leads to difficulties in concrete pouring and demolding, and the variety of slope types for the revetment increases formwork costs, resulting in a significant rise in product prices due to decreased turnover rates. Additionally, transporting and delivering the blocks, as well as installation and dimensional adjustments on-site, require considerable effort, hindering the efficiency of the laying work. Therefore, the TG-style parapet wall is designed to allow for adjustments in the cast-in-place concrete to accommodate changes in the slope of the toe section, making it a construction-friendly structure and dimension. This method of constructing parapet walls responds to the recent demands for cost reduction and high-quality construction. For more details, please contact us or refer to our catalog.

• Protective fence
• River construction
• Crane and others

The TG method involves installing concrete by filling it into the ground across driven sheet piles, without the need for any formwork. Therefore, it does not use wood, contributing to the prevention of global forest resource depletion and promoting greening. There is no concern about floating, washing away, or misalignment during construction even in rising water conditions, significantly shortening the construction period and reducing the number of on-site workers, making it an economical method and product. It is easy to manage dimensions and quality, and curing work is also simple. Additionally, there are products available that accommodate wide sheet piles. For more details, please contact us or refer to the catalog.

• Airport facilities
• River construction
• Piles, caissons, sheet piles

In recent years, the creation of rivers with rich environments of water and greenery has been promoted, and step revetments equipped with water-friendly functions that allow people and nature to interact as public spaces are being constructed in various locations. The TG-style step block "Mizube" is a block designed for step revetments that takes into account flood control functionality, aesthetics, and cost-effectiveness. It comes in a wide variety of options, allowing for selection based on the natural environment and intended use of the site. For more details, please contact us or refer to the catalog.

• Airport facilities
• River construction
• stone

Due to the growing awareness of waterfront environments, riverbank construction methods that use natural materials such as wood and stone have been re-evaluated with consideration for natural ecosystems. To this end, Toho Giken Co., Ltd. has developed various products, including the wooden sunken bed "Biocross," the wooden formwork "Bels," the wooden composite block "Bioplus," and the multifunctional fish nest "Max," which have been successfully implemented in rivers across the country. We have now developed and proposed a new TG-style single-sided formwork construction method called "MACS-II" (Max II), which is effective for ensuring the safety of riverbank flood control functions and creating ecological environments. For more details, please contact us or refer to our catalog.

• Airport facilities
• River construction
• Wood panel and frame wall construction

Concerns about the deterioration of the natural environment and considerations for economic conditions have led to a demand for high-quality techniques in the execution of future public works, including environmental conservation and cost-effectiveness. In order to protect our country's "beautiful mountains and rivers," various bank protection methods and materials have been developed to preserve and create rich and vibrant natural landscapes and ecosystems. To this end, Tōō Giken Co., Ltd. has been working on the development and dissemination of numerous products and methods for bank protection. Recently, we have developed the "Jun Rock," a natural stone composite TG-type environmentally friendly block that harmonizes with the natural environment while maintaining safe flood control functions. The "Jun Rock" features approximately 12% void area per block, providing space for plants and small organisms to thrive, thus contributing to the preservation and creation of ecological environments. Additionally, the surface of the block is covered with natural granite finished with a protruding texture, offering a calm and rich appearance and landscape that only genuine materials can provide, unlike artificial stone blocks. For more details, please contact us or refer to our catalog.

• Airport facilities
• River construction
• Tile work

Tōō Kingiken Co., Ltd. developed and proposed the small connecting block "Fessel S" in 1982, which features connection and interlocking functions within the block itself. In 1986, for the large-scale disaster recovery work on the Yoshidagawa River, we developed the large connecting block "Fessel L," which received praise for its labor-saving properties, workability, and shortened construction period. In 1997, ahead of the promotion of "natural river development" due to the revision of the River Law, we developed and proposed "Fessel G," which incorporates soil covering functions and a surface porous structure, taking ecosystem conservation into consideration. Since 1994, it has been adopted in natural riverbank construction methods in rivers in the Tohoku region. Subsequently, through business partnerships with several companies, we have achieved a construction record of 330,000 square meters, including in the Chubu and Shikoku regions, and have received recognition for our work. For more details, please contact us or refer to our catalog.

• Tensioning and connecting blocks
• Airport facilities
• Earthworks

Tōō Kingiken Co., Ltd. has developed the "Ee Frame," a revetment method that excels in economy, construction, and functionality, utilizing high corrosion-resistant alloy-coated steel plates (Nippon Steel's Super Dima) and thinned timber logs as alternatives to traditional river construction methods such as willow branch work, chestnut stone rough wood work, soil cover block work, and cage mat methods. This method contributes to cost reduction, the utilization of domestic thinned timber, the recycling of construction by-products, and resource and energy conservation through reduced coating amounts on steel plates, thus helping to prevent global warming. It is also suitable for the preservation and regeneration of our beautiful natural environment and the maintenance of flood control functions, making it a "multi-natural river construction method." For more details, please contact us or refer to the catalog.

• Special Construction Method

In recent years, the method of "multi-natural river development," which does not use concrete (invisible methods), has been promoted in various regions, resulting in significant effects on the conservation and restoration of habitats for diverse organisms living by the water and natural landscapes. On the other hand, riverbank protection methods are required to have comprehensive functions, including flood disaster prevention and environmental measures. To this end, Toho Giken Co., Ltd. has been working on the development and dissemination of various methods and products under the "TG-style multi-natural riverbank series," with the guidance and cooperation of related parties, and has achieved implementation results in rivers across the country. The "TG-style sunken bed method" is a sunken bed construction that combines concrete foundation blocks with natural wooden lattice materials. For more details, please contact us or refer to the catalog.

• Airport facilities
• River construction

The TG-style wooden sunken floor construction "Biocross" features a base frame that is processed and assembled in the factory. At the construction site, the wooden sunken floor is completed through simple work processes, including laying the base frame, installing assembly bolts, erecting the framing materials, and placing the sunken stones. Compared to traditional wooden sunken floor construction, this method significantly reduces the number of workers required on-site, resulting in lower construction costs per cubic meter. Additionally, compared to wooden sunken floor construction with concrete block foundations, it reduces expenses related to block manufacturing, transportation, and installation, while the materials used are lightweight and offer excellent workability, making it a cost-effective construction method. For more details, please contact us or refer to the catalog.

• Earthworks
• Pile and foundation work
• stone

This construction method involves assembling a lightweight main sheet with joint fittings and bolts to create a framework, filling it with infill material to maintain flood control functionality. The components are lightweight, and assembly and installation are simple tasks that only require bolted connections. Even when installing a top cover, it can be easily connected using super clips, demonstrating excellent workability.

• Dam construction
• Airport facilities
• River construction

Biocross is proposed as a "multi-natural river construction" method that can be implemented more easily and economically. 【Features】 ○ The base frame is processed and assembled in the factory, and on-site work involves simply laying the base frame, installing assembly bolts and square materials, and placing the sinking stones, resulting in the completion of the wooden sunken bed. ○ Compared to traditional wooden sunken beds, the number of on-site workers can be significantly reduced, leading to lower construction costs per cubic meter. ○ Unlike wooden sunken beds with block foundations, there is no need for the manufacturing, transportation, or installation of concrete blocks; the materials are lightweight, making on-site construction extremely simple with manual labor, resulting in lower costs and a multi-natural wooden sunken bed that addresses cost reduction. ● For other functions and details, please download the catalog.

• Steel structure construction
• Foundation construction
• Airport facilities