Developed the self-drilling rock bolt system "Hawk Nailing" as per this specification.
Self-drilling bolt system used in conjunction with casing pipes. Ensures reliable grout filling. A lightweight and compact system suitable for construction in narrow spaces.
◎This is a self-drilling "high corrosion-resistant hollow bolt" for the specified installation. It is a casing and spacer combined type. The use of a self-drilling method with casing pipes improves construction quality. It is also suitable for construction in narrow areas, as it can be operated with a lightweight drilling machine or manually (using a leg hammer). Features: - A self-drilling bolt system that combines casing with "high corrosion-resistant hollow bolts." - Construction is possible with lightweight drilling machines or manually. - Ensures reliable grout filling. - Effective for construction in narrow spaces. The "Hawk-Nailing" is a self-drilling bolt system that uses hollow rock bolts with a corrosion-resistant coating (32 mm diameter) combined with casing pipes. It enables reliable grout filling, which has been a challenge in previous self-drilling methods. Additionally, it allows for construction with compact drilling machines or manually (using a leg hammer), making it suitable for narrow areas where large machinery cannot access. ★ We will be exhibiting at the Construction Technology Exhibition 2024 in the Kinki region! We look forward to your visit. Date: November 7, 2024 (Thursday) 9:30 AM - 5:00 PM November 8, 2024 (Friday) 9:30 AM - 4:45 PM Location: Intex Osaka, Hall 6, Zone C Booth Number: 176
basic information
○ Rock Bolt Specifications (High Corrosion-Resistant ZAM※ Coated Specification) Designation: R32 Cross-sectional Area (mm²): 432 (386) ※ The cross-sectional area in parentheses considers a corrosion allowance of 1mm Yield Load (kN): 200 Yield Point (N/mm²): 463 Tensile Load (kN): 230 Tensile Strength (N/mm²): 533 Weight (kg/m): 3.4 ※ "ZAM" is a registered trademark of Nippon Steel Corporation. "ZAM" is the product name for the galvanized steel sheet made from a molten zinc-aluminum-magnesium alloy developed by Nippon Steel Corporation. ■ Drilling Method Air and other supplies are provided from the swivel set on the rock bolt to drill to the specified depth. The drill cuttings are discharged through the gap between the casing pipe and the hole wall. (Reverse circulation drilling) ■ Injection Method Cement milk is filled and injected through the casing pipe with the injection head attached. After confirming no leaks, supplementary injection is performed while retrieving the remaining casing pipe. ■ Pipe Removal Method (Manual) Manual pipe removal work is possible. The tool used for pipe removal is divided into a wedge part and a striking part (weight), and after inserting the striking part into the casing pipe, the wedge part is set, and the striking part is lifted upward while removing the pipe.
Price range
Delivery Time
Applications/Examples of results
Reinforced soil work using rebar insertion (rock bolts) for cut slope stabilization.
Detailed information
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Air and other supplies are provided from the swivel set on the rock bolt, and drilling is carried out to the specified depth. The drill cuttings are discharged through the gap between the casing pipe and the hole wall. (This is known as reverse circulation drilling.)
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Cement milk is filled and injected through the casing pipe with the injection head attached. After confirming there are no leaks, supplementary injection is performed while retrieving the remaining casing pipe.
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This system allows for manual extraction work. The tool used for extraction is divided into a wedge part and a striking part (weight). After inserting the striking part into the casing pipe, the wedge part is set, and extraction is performed by striking the striking part upward.
