Field and lab tests
DCP refusal
Refusal means the cone could not go deeper. Here is how to record it and how it shows on the log.
Refusal is when you cannot drive the cone further. For example, you hit rock or a very hard layer.
Record a refusal
- Add or edit the DCP reading at the depth where the cone stopped.
- Switch on Refusal. The switch says: "The cone stopped going down."
- Fill in Travel on last blows (mm). This field only shows when Refusal is on.
- Save the reading.
What you see
- The chart marks the reading with a clay-coloured end cap and an R.
- The PDF log draws the same cap and letter.
If you switch Refusal off
The app clears Travel on last blows (mm). The reading becomes an ordinary reading again.
Refusal on the borehole
The borehole also has an Ended because field. Choose Refusal there if the whole hole ended in refusal. The two settings are separate. The DCP refusal marks one test. Ended because describes the hole.
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