Swellex Bolt
Advantage:
The Split Set Anchor / Friction Rock Stabilizer offers significant advantages in the field of geotechnical support. As a highly effective Friction Rock Stabilizer, the specially designed Split Set Anchor creates radial friction to quickly reinforce unstable rocks in mines and tunnels. Compared with traditional support methods, the Split Set Anchor is easy to install and requires no grouting or complex equipment, significantly saving construction time and costs. In addition, Self-Drilling Friction Bolt further optimizes the process by combining drilling and anchoring functions, especially for broken formations. Its high tensile strength, corrosion resistance and adaptability make it the solution of choice for modern geotechnical engineering.
Description:
Split Set Anchor is an efficient and reliable geotechnical support product, widely used in mining, tunneling, slope reinforcement and other engineering fields. As a representative of Friction Rock Anchor, it is designed with an axial slit in the high-strength steel pipe, which generates a radial expansion force during installation and closely adheres to the drilling wall to form a stable friction anchoring effect. Compared with traditional anchors, Split Set Anchor does not require grouting or resin reinforcement, and is quick to install, providing immediate support and significantly improving construction efficiency.
Compared to Swellex Bolt, Split Set Anchor has the advantage of being simpler and less costly to install, with excellent tensile strength and shear resistance, making it suitable for a wide range of geologic conditions. The high toughness of the material adapts to the deformation of the rock mass and maintains the stability of the support over time. In addition, Split Set Anchor can be used with different sizes of trays and nuts to flexibly meet project needs, making it an ideal choice for underground project support. Whether for temporary support or permanent reinforcement, Split Set Anchors and Friction Rock Anchors provide a safe, cost-effective and efficient solution and have become one of the key technologies in modern geotechnical engineering.
Specification
Diameter(±0.5) | 33mm | 39mm | 40mm | 42mm | 46mm | 47mm |
Length(±0.5) | 1.2m | 1.5m | 1.9m | 2.0m | 2.5m | 3m |
Mining Plate(±0.5) | 140*140*6mm,150*150*5mm,200*200*10mm | |||||
Material | Q235,16Mn,20 Mnsi | |||||
Material of sewing tube anchor
The material of sewing tube anchor directly affects its bearing capacity, durability and applicable environment. Common materials include:
(1) High-strength alloy steel
High-quality carbon steel (Q235, Q345) or alloy steel (42CrMo) with high tensile strength (≥500MPa) and good toughness.
The surface can be hot dip galvanized (HDG) or epoxy coated to improve anti-corrosion performance, suitable for wet or corrosive environments.
(2)Stainless steel material (optional)
Suitable for highly corrosive environments (e.g. coal mines, saline and alkaline strata), with 304 or 316 stainless steel to extend service life.
(3)Special treatment process
Cold roll forming:Ensure uniform wall thickness of the steel pipe and improve the effect of rubbing anchoring,
Heat treatment and tempering:Enhance the hardness and fatigue resistance of the steel.
Performance Characteristics of Slit Pipe Anchor
The core advantage of Slit Pipe Anchor (Friction Rock Stabilizer) lies in its immediate support ability, high friction resistance and construction convenience, the main performance indexes include:
(1) High friction anchoring force
Through the elastic deformation of the steel pipe and the borehole wall closely, radial friction resistance (30-50kN) is generated, which can provide immediate support without grouting.
It is suitable for unstable geological conditions such as loose rock formations and fractured zones.
(2) Excellent tensile and shear resistance
Tensile strength ≥150kN, shear resistance ≥100kN, can effectively control the deformation of surrounding rock.
Compared with Swellex Bolt (Expansion Anchor), Slit Tube Anchor is more suitable for dynamic loading environment.
(3) Adaptable
can be matched with accessories such as pallets, nuts, ball washers, etc. to adapt to different support needs.
Diameter range of 33mm-48mm, length of 1m-6m, flexible to match the needs of the project.
(4) Corrosion resistance
Galvanized or epoxy coated treatment ensures more than 20 years of service life and reduces maintenance costs.
Production process of sewing tube anchor
The manufacturing process of sewing tube anchor directly affects its quality and performance, and the key steps include:
(1) Steel pipe cutting and seam opening
Laser cutting or precision sawing is used to ensure a flat cut and reduce stress concentration.
Single or double slits (width 1-2mm) are opened along the axial direction to provide elastic expansion capacity.
(2) Cold Roll Forming
Adjust the outer diameter of the tube by cold rolling process to improve surface smoothness and enhance friction contact area.
(3) Heat treatment (optional)
Tempering (quenching+tempering) of high-strength steel to enhance comprehensive mechanical properties.
(4) Anti-corrosion treatment
Hot dip galvanized (zinc layer ≥80μm) or sprayed with epoxy resin, suitable for acidic and humid environment.
Installation and use of Slit Pipe Anchor
The installation of Slit Pipe Anchor (Self-Drilling Friction Bolt) is convenient and suitable for quick support, the main steps are as follows:
(1) Drilling
Drill the holes with rock drill or drill truck, the hole diameter is 2-4mm larger than the anchor diameter (e.g. Φ33 anchor with Φ35-37 drill hole).
Make sure the hole wall is clean and no residual slag.
(2) Anchor installation
Insert the sewing tube anchor into the hole, and strike the end of the anchor with an impact hammer or installation machine to make it fully expanded and closely fit with the hole wall.
Provide support force instantly after installation without waiting for curing (e.g. resin anchors need to wait for solidification).
Product Qualification
