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Help CenterHigh Quality Ground Rock Anchor Bolt ,Fully Screw Tie Rod
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high quality ground rock anchor bolt,Fully screw tie rod
Brief introduction
Self drilling rock anchor bolt is a bolting solution for unstable ground conditions such as sand, gravel, silt, and clays, and in soft to medium fractured rock formations.
For projects facing above geo-conditions, hollow bar self-drilling anchor should be considered as the main solution cuz it's designed for optimized installation, tailored to the project's needs.
By drilling a hole in collapsing soil or loose lock, with a sacrificial drill bit an a hollow bar, and after the drilling operation injecting cementitious grout or resin into the hollow bar and surrounding cavity, it's a top solution choice.
FEATURES :
(1) In the longitudinal direcition , rock body has equal tensile strength ,that is about 40% higher than the reverse-twist bolt in the same specification .
(2) Extend the support area , not only be used by end anchoring ,but also be used by fully anchoring ,that has a better support efficiency .
(3)Low price, widely used in coal mines, railways, hydropower and other types of roadway projects.
finish:yellow/blue/white zinc plated, hot dip galvanized
Test anchoring force
| Type | METAL BAR Diameter(mm) | anchoring KN | ||||
| deformed steel bar 6s≥335MPa | φ22 | >125 | ||||
| φ20 | >105 | |||||
| φ18 | >85 | |||||
| φ16 | >75 | |||||
| round steel bar 6s≥235MPa | φ22 | >90 | ||||
| φ20 | >70 | |||||
| φ18 | >60 | |||||
| φ16 | >50 | |||||
,
Specification:
| d | length | ||||||
| 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2600 | |
| φ16 | - | + | + | + | - | - | - |
| φ18 | - | + | + | + | + | - | - |
| φ20 | - | - | + | + | + | + | - |
| φ22 | - | - | - | + | + | + | + |
| Specification | Nominal Outside
Diameter
|
Ultimate Tensile
Force (KN)
|
Thread Direction | Pitch (mm) | Standard Length (mm) |
| Φ25 | 25 | 180 | Left | 12.7 | 2.5,3,3.5,4,4.5,5m |
| Φ28 | 28 | 220 | Left | 12.7 | 2.5,3,3.5,4,4.5,5m |
| Φ32 | 32 | 320 | Left | 12.7 | 2.5,3,3.5,4,4.5,5m |
| Φ38 | 38 | 380 | Left | 12.7 | 2.5,3,3.5,4,4.5,5m |
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