1. Bearing efficiency coefficient of nut assembly: no longitudinal rib rebar type ≥ 0.95; Equal strength rebar type ≥ 0.95.
2. Matching nut: ordinary nut, flange nut, mushroom first-class strong nut, iron damping nut, injection damping nut.
3. the bearing capacity of the tray: should not be less than 1.3 times the standard value of the yield force of the matching rod body.
Supporting tray: 120×100×8, 110×110×10, 120×120×8, 130×130×10, 150×150×10, etc. (unit mm).
4. Accessories for high-strength bolt:
High-strength damping nut: it can be matched with high-strength non-longitudinal ribbed steel bar body with yield strength of 500MPa. Compared with cast steel or forged nut, it can give full play to the performance of anchor rod.
Greatly improve the supporting effect; The high strength damping nut is a composite plastic plug injected at the back end of the screw hole of the nut body. Due to the role of the damping plug, the nut belt can be screwed
The dynamic bolt rotates together, fully stirring the bottom of the hole, the anchoring effect is good, effectively improve the installation stress of the bolt, and improve the support effect of the bolt! The main models are
M24, M22, M20, M18, the shape of four, six two kinds.
Drag reduction washer: the drag reduction is obvious, and the use of high-strength damping nuts can increase the prestress installation of the anchor rod by more than 50%.
Metal flat washer: improves the stress condition of the nut.
Let pressure pipe: reduce the impact damage of high ground pressure on the anchor rod, and greatly improve the roadway support effect under high ground stress under the condition of ensuring prestress.
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