Self-drilling Anchor Bolt

The product is composed by hollow anchor bar, anchor nut, anchor plate, anchor coupler, drill bit, and the hollow anchor bars can be cut and lengthened by coupling on request. It is unique anchoring system and can meet current and increasing demands of the tunneling industry and ground engineering.

Product Description

Type	Outer Dia. (mm)	Inner Dia. (mm)	Ultimate Load (KN)	Yield Load (KN)	Weight (Kg/m)	Thread type（Left hand）	Length	Steel
R25N	25	14	200	150	2.3	ISO10208	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R32L	32	22	260	200	2.8	ISO10208	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R32N	32	21	280	230	2.9	ISO10208	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R32/18.5	32	18.5	280	230	3.4	ISO10208	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R32S	32	17	360	280	3.5	ISO10208	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R38N	38	21	500	400	4.8	ISO10208	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R38/19	38	19	500	400	5.5	ISO10208	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R51L	51	38	550	450	6.0	ISO 1720	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
R51N	51	33	800	630	7.6	ISO 1720	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
T76N	76	49	1600	1200	16.5	MAI T76 standard	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1
T76S	76	45	1900	1500	19.0	MAI T76 standard	2m, 3m, 3.5m, 4m, 4.5m, 6m	EN 10083-1

1M,2M,3M,4M,6M can be supplied.

Features
1. Safe, reliable, and time saving. Self drilling system eliminates the requirement for a cased borehole.
2. Simple installation & operation.
3. Choice of drill bits for different ground conditions.
4. Grouting works synchronize with drilling or after drilling. Grout can fill fractures effectively.
5. Anchor bars can be cut and lengthened on request, applying to narrow spaces.
6. It provides higher bonding stress than smooth steel pipe depending on continuous wave thread.
Application
Radial bolting
Slope stabilization
Fore poling
Micropile

The system provides advantages for all areas of its applications, where boreholes would require the time consuming drilling with casing systems in unconsolidated or cohesive soil.

Threaded hollow bars are widely used in construction, mining, and tunneling industries for various applications. Some common uses and advantages of threaded hollow bars include:

1. Ground stabilization: Threaded hollow bars are used for ground stabilization in rock and soil. They are inserted into the ground and grouted to provide support and reinforcement, particularly in areas prone to landslides, collapsing walls, or sinkholes.

2. Anchoring systems: Threaded hollow bars can be used as part of anchoring systems to provide stability and support to structures. They are commonly used to secure retaining walls, slopes, and deep excavations, minimizing the risk of structural failure.

3. Foundation reinforcement: Threaded hollow bars are used to strengthen foundation structures in construction projects. By embedding the bars in concrete or soil, they increase the load-bearing capacity of foundations and prevent settlement or shifting.

4. Tunneling and mining: Threaded hollow bars are essential in tunnel construction and mining as they provide ground reinforcement and support to prevent collapse or cave-ins. The bars can stabilize the rock or soil while also serving as the base for other support structures.

Advantages of threaded hollow bars:

1. Versatility: Threaded hollow bars come in various sizes and lengths, making them suitable for a wide range of applications. They can be easily customized to fit specific project requirements.

2. High load-bearing capacity: These bars are designed to withstand heavy loads and provide substantial support and reinforcement to structures. They can effectively distribute and transfer the load to prevent any structural damage.

3. Corrosion resistance: Threaded hollow bars are often made of high-strength steel or other materials with excellent corrosion resistance. This makes them suitable for use in harsh environmental conditions, including marine or underground applications.

4. Installation efficiency: The threaded design of these bars allows for quick and easy installation. They can be installed with various types of drilling equipment, reducing labor and installation time.

5. Reliability and durability: Threaded hollow bars are known for their strength and durability, ensuring long-term stability and performance. They are built to withstand heavy loads, vibrations, and external forces.

Overall, threaded hollow bars offer a reliable and efficient solution for ground reinforcement and structural stability in various construction and mining applications.

Self-drilling Anchor Bolt