Self drilling anchors are most commonly used items for slope stabilization projects as well as tunneling and mining projects because of its flexibility to use in various type of soil and rock conditions. JB Engineering Corporation systems reduces the cost of project to a significant amount with its lower cost of stocking as it can be kept with full length and can be cut as per project requirement. Smaller diameter bars can be used under same load due to extraordinary steel mechanical properties. Several types of drill bits (Cross, Clay, Jetting, segment etc.) available for various project needs. Soil nailing should be planned in rhombus shaped grid to ensure efficient distribution of the reinforcement. Available in various types of coatings such as epoxy, galvanized etc.
The JB Engineering Corporation system is designed to drill without casing loose soil as well as rock. Available in various sizes R25, R32, R38 and R51 along with matching accessories such as drill bit, coupler, hex nut, bearing plates etc. The system is designed for both temporary and permanent applications. It allows optimum bonding and load transfer. JB Engineering Corporation system is fully compliant to EN 14490 (European Standard for Soil Nails).
Self drilling anchors are special type of rod anchors. Self-drilling anchor consists of a sacrificial drill bit, hollow steel bar of the appropriate outer and inner diameter and coupling nuts. The anchor body is made of a hollow steel tube with an outer round thread. Steel tube has the sacrificial drill bit at one end and the corresponding nut with a steel end plate.
Self drilling anchors are used in a way that hollow steel bar (rod) has a corresponding sacrificial drill bit on its top instead of a classic drill bit. Centralisers guarantee a consistent grout cover around the hollow steel bar and that the bar remains in the center of the drilled hole.
The basic application of self drilling anchors is installation under the conditions of the soil/rock with the risk of drill hole collapse due to pulling out of drill bit as in the classical anchor installation process.
Self drilling anchors can be installed in length greater than classic rod anchors (joining of a hollow steel bar with coupling nuts).
Self Drilling Anchors are used in a variety of civil engineering and geotechnical applications, including: