Yidao Helical bolts composed of a Grade500-left hand hot-rolled thread bar, with bar diameters φ22 ,φ25, φ32mm , with a washer plate and dome nut, are used as a support element of high resistance in fortification and the reinforcement of rock slopes and soils, thus maintaining the integrity of the rock subjected to efforts in such a way that they act effectively either as an arch or a beam stretched through the excavation.
This bolt consists of a helical thread bar with an oval cross-section that acts with a fastening system, which consists of a perforated steel plate and dome nut. The latter work in a complementary fashion to strengthen and preserve the natural resistance of rock massif.
Geo-mechanical and operational advantages
Good for projects undertaken in areas with poor quality rocks and in high stress zones.
Large load transfer capacity on rock massifs.
The product’s simple design allows for simple and quick installation.
No sophisticated equipment is needed to make adjustments.
BACK 
