JFE商事テールワン List of Products and Services

The 'SP Soil Nail' handled by JFE Shoji Tail One Corporation is a self-drilling permanent rock bolt method developed by its group company, ST Engineering Co., Ltd., which is suitable for ground where the borehole walls do not stand independently. It can be constructed using general-purpose machinery such as small boring machines and backhoe drills, and depending on site conditions, construction can be carried out while minimizing scaffolding. By adopting a unique "partial double-tube method" and "two-directional pressure injection," it achieves improved workability and stable anchoring performance. Compared to conventional double-tube drilling methods, it is expected to reduce labor, shorten construction periods, and lower costs. Additionally, it accommodates a wide range of ground conditions from sandy soils to weathered rock and soft rock. It is utilized in various sites for slope reinforcement and slope disaster prevention measures. Furthermore, with the revision of NEXCO's "Cutting Soil Reinforcement Construction Method Design and Construction Guidelines" in July of the 6th year of Reiwa, the approach to applying self-drilling types to permanent installations has been reconsidered. It is anticipated that there will be further opportunities for comparison and examination of the SP Soil Nail method as an option for permanent reinforcement in ground where the borehole walls do not stand independently.

The "ST Micro Cap" is a product designed with a filling inlet and outlet on a circular plate, enabling void filling. It features an angle adjustment function for ground inclination, simplifying the structure and pursuing cost-effectiveness through the integration of traditional washers and plates. It also allows for secondary injection options to the back of the anchor, where issues are likely to occur. Please feel free to contact us when you need assistance. 【Features】 ■ The traditional square washer has been replaced with a circular washer of the same area, with four stiffeners arranged. ■ The bending rigidity of the washer has improved, resulting in more uniform load distribution from the lock bolt compared to conventional designs. ■ By integrating the reaction surface of the spherical hex nut with the washer, the installation process has been made more efficient. ■ The one-piece molding is expected to enhance cost-effectiveness. ■ The outer surface of the circular plate is finished with hot-dip galvanized coating, providing excellent protection from external environments. ■ By using a spherical male washer, it is also possible to accommodate other perforated bolts. *For more details, please download the PDF or feel free to contact us.

The "ST Lock Bolt" is a product designed for rebar insertion work with a nominal diameter of up to 65mm, where the hole wall is self-supporting. Rigid foam polyurethane effectively fills not only the back void but also various gaps around it. Considering the mortar finish on the head and the water-stopping function, it has an excellent head structure in terms of functionality, workability, and cost-effectiveness. [Accessories] ■ Spherical nut ■ Tip cap ■ Coupler *For more details, please download the PDF or feel free to contact us.

The "SP Leg Drill" is a product that enables the installation of permanent bolts up to 3.0m in ground that does not support self-standing holes using a leg drill. This pressurized injection can also be applied for the repair of aging slope coverings. It ensures reliable anchoring through pressurized injection. 【Features】 ■ Active two-directional pressurized injection ■ Achieves reliable full-area anchoring *For more details, please download the PDF or feel free to contact us.

The "SP Anchor" is a self-drilling rock bolt that can be used as a locking bolt with the drilling rod as is, particularly in unstable ground such as unsupported rock walls or steep slopes, where improved workability is desired. Rock bolts are widely used in tunnel support work in mountainous areas and slope reinforcement earthworks. Various types of grouting agents, such as cement-based and polyurethane-based, can be selected. Please feel free to contact us when needed. 【Features】 ■ No need for double pipes, making the drilling machine compact and easy to move, suitable for narrow workspaces. ■ Drilling, rod insertion, and grouting can be completed in one process, making it economical. ■ Can handle various strata with the same operation, eliminating the need for additional geological testing. ■ The series of operations is simple and does not require highly skilled workers. ■ It is a fully threaded steel rod, and by connecting with couplers, it can accommodate any length. ■ Various types of grouting agents, such as cement-based and polyurethane-based, can be selected. *For more details, please download the PDF or feel free to contact us.

The "Hybrid MP Method" is a construction technique that can be implemented even in narrow spaces within densely populated residential areas, allowing for affordable and reliable seismic reinforcement. Before pouring concrete on the entire surface and the top horizontal part of the existing stone masonry retaining wall, tension piles are driven in a diagonal vertical direction. Additionally, compression piles are driven nearly vertically into the foundation of the existing stone masonry, protecting the entire surface of the retaining wall to prevent the collapse of the stone masonry retaining wall. 【Drilling Call Diameter】 ■φ115 ■φ135 ■φ146 *For more details, please download the PDF or feel free to contact us.