東興ジオテック List of Products and Services

This construction method combines a high-durability substrate that is highly resistant to erosion and does not mix seeds, with a seed fixation promotion net called "Seed Catcher V2," which efficiently captures seeds that fly in from the surrounding area. This allows for the rapid natural invasion of surrounding vegetation even on uneven rock slopes. The natural invasion promotion method utilizes the inherent recovery potential of nature for greening, aiming for vegetation through plants that invade from the surrounding area without bringing in plant materials (such as seeds or seedlings) from other regions. This helps avoid disruption of local genetic diversity. Therefore, it can be applied in greening projects in areas with high environmental conservation standards, such as national parks, where obtaining local seeds (seeds collected from the construction site area or seedlings grown from them) may be difficult. Additionally, this method is effective in cases where it is challenging to introduce vegetation through seeding or planting on sloped areas, or when the scale of the slope is relatively small and there are natural forests nearby, providing a close source of seeds.

• Slope protection material
• Civil Engineering Method
• Road construction

This method enables spraying in sites with a vertical height of over 80 meters, which was difficult with conventional vegetation substrate spraying methods. It has a proven track record of long-distance and high-elevation construction, with at least 700 meters of pumping distance and a vertical height of 160 meters, eliminating the need for temporary spraying plant yards or cableways for transporting materials. This method is particularly suitable for greening disaster recovery work in areas affected by landslides due to heavy rainfall, where the installation of temporary scaffolding is challenging. Additionally, this method can accommodate various greening objectives, ranging from rapid greening using non-native herbaceous plants to natural recovery greening with native species (herbaceous and woody plants) and the use of locally sourced seeds for regional seedling utilization.

• Civil Engineering Method
• Other civil engineering works
• Dam construction

This construction method involves directly spraying a high-quality organic growth substrate "Orgasoil" mixed with a reinforcement material "Non-Ras Fiber" and a thickening adhesive "Non-Ras Bond" onto the ground, thereby eliminating the need for wire mesh installation (Ras installation) while enhancing erosion resistance and strength. Although the wire mesh omission method has been developed and adopted in various regions across the country, it had the drawback of the growth substrate peeling off due to weather and site conditions when the spray thickness was thin. This method significantly improves the durability of the growth substrate through the use of the newly developed "Non-Ras Bond" and "Non-Ras Fiber," addressing the shortcomings of conventional techniques.

• Road construction
• Civil Engineering Method
• Power generation facilities

Kiri Fiber is a short fiber material designed to suppress crack formation in mortar and concrete spraying work, developed to effectively utilize textile waste yarn that is disposed of as industrial waste. It is a recycled product made from polyester waste yarn cut to approximately 20mm. Kiri Fiber demonstrates excellent crack suppression effects by dispersing short fibers within the mortar and concrete.

• Fiber wall
• Earthworks
• Pile and foundation work

This is a resource-circulating greening method that uses site-generated soil, such as excavated soil and collapsed earth, as the main material for the growth substrate. By combining a unique adjustment technology for site-generated soil at the construction plant with a spraying method that uses a granulation agent solution in the water, up to 80% of the growth substrate can be made from site-generated soil. Using site-generated soil as the main material reduces CO2 emissions associated with the transportation of earth and minimizes the use of growth substrate materials that produce CO2 during the production process at the factory. It also creates a low-cost growth substrate with a granular structure suitable for plant germination and growth, and high erosion resistance. In traditional methods, using site-generated soil as the main material required it to be made into a slurry, as in the case of imported soil spraying work. However, the Recycling Earth Green Method allows for the omission of wire mesh installation and enables the spraying of a growth substrate made from site-generated soil at a thickness of 3 to 10 cm or more by employing 1) a unique adjustment method for site-generated soil, 2) the mixing of short fibers, and 3) using the granulation agent solution as water. The Recycling Earth Green Method can accommodate a wide range of greening purposes, from rapid greening to natural recovery greening using domestically produced native species.

• Fiber wall
• Retaining wall
• Pile and foundation work

This is a vegetation substrate spraying method that combines "Orga Soil," an organic growth substrate made from a mixture of high-quality bark compost and peat moss, with "Remi Control," an inorganic erosion control material that does not adversely affect plant growth, to create a growth substrate that is highly resistant to erosion and suitable for plant germination and growth.

• Waste treatment facilities
• Erosion control works
• Other civil engineering works

The Early Germination Power Testing Method (NETIS: KT-060003-V, utilized from fiscal year 2013 until the end of the registration period) is a seed quality inspection technique that can test the germination rate of woody plant seeds within about a week, regardless of whether the seeds are dormant. The correlation between the test values and the germination rates obtained by conventional testing methods is very high, allowing for the pre-confirmation of germination rates of woody plant seeds, which often have significant variability, and reflecting this in seed mixture design. This greatly enhances the accuracy of quality management in design and construction. The Japan Tree Seed Research Institute applies the Early Germination Power Testing Method to seed quality management and the development of storage technologies, supporting the supply of reliable domestically produced native seeds. Additionally, they offer contract services for vitality testing of seeds using the Early Germination Power Testing Method.

• Retaining wall
• Earthworks
• Pile and foundation work

This is a resource recycling greening method that uses shell remedy (crushed shell material) made from shells generated in coastal facilities and aquaculture industries to restore vegetation in strongly acidic soils (pH 4.0 or lower). Depending on the presence of spring water from the underlying ground, two types are selected: the corrective material mixing type and the corrective layer construction type. If there is no spring water from the underlying ground, the "corrective material mixing type" is applied, where shell remedy is mixed into the growth substrate and sprayed. If there is spring water from the underlying ground, the "corrective layer construction type" is applied, where an acidic corrective layer using shell remedy is constructed, and the growth substrate is sprayed on top for greening. When greening strongly acidic soils with a pH of 4.0 or lower, if measures against acidic soils are not taken, plants will be directly affected by hydrogen ions, and there will be indirect negative impacts due to changes in soil components and soil microbial dynamics. Therefore, when strongly acidic soils appear, it is difficult to maintain or restore vegetation with standard greening work, and it is necessary to consider the application of the Alplus method as a measure against strongly acidic soils.

• Retaining wall
• Earthworks
• Pile and foundation work

This is a method of spraying container seedlings (pot seedlings) and mountain seedlings collected around the site using a vegetation substrate spraying technique. It eliminates the need for digging planting holes and prevents weathering of the ground due to rainwater infiltration, thus avoiding concerns about destabilizing slopes. There are two types: the "pot seedling spraying type," which uses commercially available pot seedlings, and the "mountain seedling spraying type," which effectively utilizes locally sourced seedlings from the surrounding area. The mountain seedling spraying method can secure seedlings to slopes through spraying, making it possible to plant on rocky slopes where conventional seedling planting is difficult, and by combining it with sowing work (vegetation substrate spraying), it can create a diverse and rich greenery.

• Retaining wall
• Pile and foundation work
• Planting work

This is a resource-circulating greening method that chips wood, stumps, bamboo, and other materials generated on-site to use as the main material for growth substrates. Since raw chips can be used directly, there is no need to dispose of on-site generated materials as industrial waste, eliminating the need for processes or yards to compost the raw chips prior to greening, which reduces costs. Furthermore, because it does not require the removal of on-site generated materials or the composting of chips, it can reduce CO2 emissions.

• Fiber wall
• Retaining wall
• Pile and foundation work

To solve the problem of stagnation in vegetation succession due to the encroachment of surrounding vegetation that traditional vegetation substrate spraying methods have, this technique intentionally applies the growth substrate in a non-planar manner to achieve partial greening. This method creates spaces where plants can naturally invade from the moment of construction. Since it is a non-planar spraying method, it can reduce the area of the growth substrate to less than half compared to traditional full greening, significantly lowering CO² emissions generated during construction and achieving excellent cost savings economically.

• Retaining wall

This is a natural restoration greening method that uses domestic native woody seeds to spray and create forests on slopes. By adding a seed supply device to the conventional vegetation substrate spraying construction plant, the "two-layer spraying system" allows for the mixing of seeds only in the top 2 cm of the growth substrate, enabling effective use of seeds and cost reduction. In recent years, there has been a growing interest in slope greening that does not use foreign species, such as grasses from the Poaceae family or foreign native species, in light of laws regarding invasive species. The "Road Earthworks - Cutting Works and Slope Stabilization Guidelines (2009 Edition)" also lists 24 species of native woody plants as the main plants used for seeding work. To use domestic native species, which have a larger variation in germination rates compared to foreign species, for slope greening, it is necessary to use seeds of clearly defined quality. The slope afforestation method uses domestically produced native seeds that have been quality tested using an early germination test method and supplies seeds packed in quality-preserving material-filled measuring bags (Remedy Seeds) from its unique seed storage and shipping facility (RS Center).

• Trees
• Other civil engineering works

This is a natural restoration greening method that uses domestic native woody seeds for spraying to create forested slopes. By adding a seed supply device to the existing vegetation substrate spraying plant, the "two-layer spraying system" allows seeds to be mixed only in the top 2 cm of the growth substrate, enabling effective use of valuable domestic native seeds and cost reduction.

• Other civil engineering works

In order to ensure a stable supply of valuable domestic indigenous seeds, we store and manage the stock seeds under optimal conditions at RS centers (seed storage facilities) for each plant species. According to the seed blending design, the stored seeds are packaged into bags using an automatic seed weighing and bagging system for each construction unit, and shipped to the site via cool delivery service. The quality of the seeds is verified using the early germination power testing method (KT-060003-V, registration period on NETIS has ended). Please understand that stock is limited, and we appreciate your patience in case of shortages.

• Other civil engineering works

Using independently developed storage technology, we manage the storage of domestically produced traditional seeds under optimal conditions. By applying storage methods suited to each type of seed, we can suppress the decline in germination rates. In greening projects that utilize seeds collected from specific regions (local varieties), our facilities can be used to store seeds until the construction period. When using stored seeds for greening projects, they can be packaged with quality preservation agents at the RS Center (seed automatic weighing and bagging facility) according to the seed mixture for each construction unit and shipped out. We also offer storage services, where the seeds entrusted to us are first adjusted to the optimal storage conditions. During storage, we conduct regular quality inspections using the early germination power testing method (KT-060003-V, H25 - Utilization Promotion Technology, NETIS registration period ended) to ensure proper management. The RS Center supports natural recovery greening using locally collected seeds that consider biodiversity and contribute to the formation of landscapes in harmony with the surrounding environment.

• Trees
• Other civil engineering services