Rock bolt reinforcement method (existing tunnel reinforcement method)

This is a method for effectively and economically reinforcing the lining with rock bolts in gravelly mountainous areas where it is difficult to achieve anchoring stability.

The "Rock Bolt Reinforcement Method" is a reinforcement method for existing tunnels based on the geological conditions of the surrounding ground. - It involves inserting steel materials deeper based on the slip surface of the soil mass, securing the entire steel structure with grout, and passively generating tensile forces in the steel as the ground deforms, thereby suppressing ground deformation and the occurrence of slips. - This method effectively and economically reinforces the tunnel lining with rock bolt anchoring, especially in sandy and gravelly ground where conventional rock bolt installation has struggled to achieve anchoring strength. 【Features】 ■ Saber EX: A high-pressure water expansion type rock bolt for reinforcement that does not require an anchoring agent. This allows for simultaneous anchoring during installation, reducing the cycle time per bolt and enabling immediate strength development. - The bolts are treated with a high corrosion-resistant coating, contributing to the longevity of the tunnel and ensuring reliable ground retention effects. ■ IBO ZAM: A self-drilling rock bolt that can perform drilling and bolt insertion simultaneously, shortening the cycle time per bolt. - It features an R32 thread rolled along its entire length, making it very easy to handle on-site. It is effective not only as a self-drilling bolt but also as an injection bolt utilizing its hollow structure. *For more details, please refer to the PDF document or feel free to contact us.

basic information

【Saber EX】 ■ Construction without filler material using high-pressure water With the expansion-type rock bolt using high-pressure water, no bonding agent is required, allowing for simultaneous installation and bonding, which shortens cycle time and enables early strength development. ■ Reliable ground support effect By providing a male thread at the mouth, it allows for tightening with a nut, which is expected to enhance the reliability of ground support. ■ High corrosion-resistant rock bolt A high corrosion-resistant surface treatment is applied along the entire length of the bolt, contributing to the longevity of tunnel structures. 【IBO ZAM】 ■ Good workability with self-drilling type The drilling rod itself becomes the rock bolt, eliminating the need for rod retrieval and rock bolt insertion. ■ Stable anchoring performance R32 rope threads are rolled along the entire length, ensuring slime discharge performance and stable adhesion. ■ Shortened cycle time Drilling and bolt insertion can be performed simultaneously, reducing cycle time. ■ Pursuit of cost-effectiveness Selecting bits according to the ground conditions to pursue cost-effectiveness. ■ Applicable to a wide range of uses NATM (pattern bolts, fore-poling) Tunnel repair and reinforcement Injection bolts (LW, urethane) Slope reinforcement And more, applicable to a wide range of uses. *For more details, please refer to the PDF materials or feel free to contact us.