Tunnel Engineering

Rock Bolt Pull-Out Capacity for Bonded Grouted Anchors in Tunnel Support calculator

Rock Bolt Pull-Out Capacity for Bonded Grouted Anchors in Tunnel Support engineering calculator.

Runnable This tool can run, but independent engineering verification has not been established.

Quick Answer

Calculate Rock Bolt Pull-Out Capacity for Bonded Grouted Anchors in Tunnel Support

Calculator

Axial Pull-Out Capacity (N)
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Result Interpretation

Rock Bolt Pull-Out Capacity for Bonded Grouted Anchors in Tunnel Support calculator computes Axial Pull-Out Capacity in N using the defined engineering formula and the input values provided. Axial Pull-Out Capacity is expressed in N. No universal acceptance threshold is defined by this calculator.

Worked Example

Verified calculation

Given:

  • Bolt Diameter = 0.032
  • Effective Bond Length = 2
  • Grout-Rock Bond Strength = 1500000

Expected Result:

  • Axial Pull-Out Capacity = 301592.89474462

Engineering Interpretation:

Under the given input conditions, the calculated result is: Axial Pull-Out Capacity = 301592.89474462 N.

The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.

Formula / Method

axial pull-out capacity = 3.14159265358979 * bolt diameter * effective bond length * grout-rock bond strength

Formula family: formula_tunnel_rock_bolt_pull_out_capacity_calculator_bonded_grouted

Variables

SymbolLabelRoleDescription
bolt_diameter Bolt Diameter INPUT Bolt Diameter
bond_length Effective Bond Length INPUT Effective Bond Length
grout_rock_bond_strength Grout-Rock Bond Strength INPUT Grout-Rock Bond Strength
axial_pull_out_capacity Axial Pull-Out Capacity OUTPUT Axial Pull-Out Capacity

Calculation Steps

  1. Enter the bolt diameter in m.
  2. Enter the effective bond length in m.
  3. Enter the grout-rock bond strength in Pa.
  4. Step 1: Compute axial pull-out capacity.
  5. Read the axial pull-out capacity (N) from the results.

Engineering Summary

Calculate Rock Bolt Pull-Out Capacity for Bonded Grouted Anchors in Tunnel Support

Frequently Asked Questions

What does this calculator calculate?

The Rock Bolt Pull-Out Capacity for Bonded Grouted Anchors in Tunnel Support calculator estimates Axial Pull-Out Capacity based on the input parameters you provide

Why is bolt diameter important in this calculation?

bolt diameter is directly proportional to axial pull-out capacity. When you enter bolt diameter in m, the calculator uses it in the engineering formula to compute the output

How should I interpret the result axial pull-out capacity?

The calculator outputs axial pull-out capacity in N. For larger forces, you can divide by 1000 to express the result in kN. The result is computed directly from the input values using the defined engineering formula

What units should I use for the inputs?

Enter each value in the units shown next to the input field: Bolt Diameter (m), Effective Bond Length (m), Grout-Rock Bond Strength (Pa). Make sure all inputs use the specified units for consistent results

What assumptions does this calculator use?

This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment

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