JB Engineering Soil Nailing Bolts are used in various Hydro Power Projects, Road Projects and Projects of the similar nature to provide strength and durabilty FUSSION BONDED EPOXY COATED & GALVANIZED MATERIALS AVAILABLE as well.
Rock bolts are 15 to 32 diameter bars, inserted in 30 to 60 mm bore holes. They are generally between 3 and 6 meters long. Let’s explore the various types of rock bolts and how they are used to ensure a secure structure.
Soil Nailing bolts usually involves the insertion of reinforcement bars (Hollow/solid) into the exposed slope followed by grouting, placement of a wire mesh and shotcreting before the testing and locking off of the nail through stressing jacks. Hollow soil nail bars can also be self-drilling thus acting as drilling rods with expendable drill bits. Soil nails are cost effective for stable soils where water pressure is not an issue and for excavations where space is a constraint.
They may be bonded along their entire length by cement grouting or anchored at various points at the base of the hole using chemical resin or a mechanical anchorage. Rock bolts transfer load from the unstable exterior, to the confined (and much stronger) interior of the rock mass.
Applying the principles of systematic rock anchoring to soil seems to be obvious, but the requirements for soil nailing are higher. Soil nails are 20 to 50 mm diameter bars, inserted in 70 to 150 mm bore holes. They are generally over 6 meters long and may be as much as 30 meters.
These two techniques above insert the reinforcing element (reinforced concrete) into the soil/rock mass. The solid and hollow bars both are available in JB Engineering Rock Bolts, India. Solid bars are usually installed into the pre-drilled holes and then grouted into place using a separate grout line, whereas hollow bars may be drilled and grouted simultaneously by the use of a sacrificial drill bit and by pumping grout down the hollow bar as drilling progresses. Applying for underground applications in unconsolidated soil/rock conditions, hollow bar is typically effective.