Rock Engineering
RQD & Core Recovery Log
Calculate and visualize Rock Quality Designation (RQD) and Core Recovery profiles from drilling runs.
RQD & Core Recovery Log
Calculate and visualize Rock Quality Designation (RQD) and Core Recovery profiles from drilling runs.
Inputs
Core Run Data
| Run ID | From (m) | To (m) | TCR (m) | Solid >10cm (m) | RQD % | Action |
|---|---|---|---|---|---|---|
| No core runs added yet. or load a preset above. | ||||||
Results
Add core runs above, or click a Demo preset, to plot RQD and core recovery against depth.
About this calculator
This free rqd & core recovery calculator runs entirely in your browser: what you enter is never uploaded. Use the calculation steps and the theory section to check the working, and print a calculation sheet with the inputs, results and formulae for your records.
Methods and references: Deere (1988).
Topics: rqd, core recovery, rock mechanics, drilling log, rock quality designation, tcr, scr.
Engineering notice: Results are for preliminary estimation, screening and education. All inputs and outputs must be independently verified by a qualified professional engineer before use in any design or construction decision. Read the full disclaimer
Disclaimer
This calculation sheet was generated with Geotechnical Toolbox for preliminary estimation, screening, educational and verification purposes only. Geotechnical engineering involves site-specific ground conditions and uncertainty. All inputs, methods, results and figures must be independently checked and approved by a qualified Professional Engineer (P.Eng. / PE) before being relied on for design, construction or any safety-critical decision. Results reflect the values entered at the time of printing. The author and site accept no liability for errors, omissions or damages arising from their use.
Open this calculator online: geotechnica.ca/tools/rqd-core-recovery
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