9 points of the hollow anchor bar in Geotechnical Anchorage Design

  1. Determine the type, structure and dimensions of the hollow anchor bar according to the anchorage strata.
  2. Test the anchoring force of the hollow anchor bar in order to inflict the coresponding prestress.
  3. Confirm the material and the cross-sectional area of the hollow anchor bar .
  4. Calculate the bond length between the grouting interactive structure and the strata.
  5. Compute the bond length between the grouting interactive structure and the hollow anchor bar.
  6. Ascertain the length of the anchored segment, tension section and anchorage depth of the hollow anchor bar.
  7. Define the tension length of the the hollow anchor bar according to the tension equipment selected.
  8. Ensure the structural form and the anticorrosion measures of the hollow anchor bar.
  9. Design the anchorage pattern and the protection measures of the drill bits.