Cone Penetration Test - CPT, CPTu
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Geotechnical CPT
A brief introduction to a Geotechnical investigation method called Cone Penetration Test, CPT or CPTu for short.
Contents at a Glance
Brief introduction to CPT
A short intro in layman terms
CPT is a well standardized method to find out the composition and properties of soils, without taking a sample.
This can be very useful since sampling is fairly time consuming and thus expensive.
The standard probe these days would measure the following parameters:
Pore Pressure (U) - The water pressure generated as the probe is moving through the soil
Point Resistance (Q) - The force required to penetrate the soil
Fritction (F) - The force generated at the side of the probe as it moves
Compared to most other non-sampling methods of investigation, such as SPT, Cone Penetration Test has many benefits.
This can be very useful since sampling is fairly time consuming and thus expensive.
The standard probe these days would measure the following parameters:
Pore Pressure (U) - The water pressure generated as the probe is moving through the soil
Point Resistance (Q) - The force required to penetrate the soil
Fritction (F) - The force generated at the side of the probe as it moves
Compared to most other non-sampling methods of investigation, such as SPT, Cone Penetration Test has many benefits.
A few CPT Benefits
Compared to SPT and other non-sampling methods
- Well standardized method
- Test result likely be comparable regardless of which operator does the test. Extensive Geotechnical knowledge not required.
- Test results likely to be independent on equipment manufacturer or firm
- Insitu test which means accurate results independent of death (rod friction doesn't affect result)
Non commercial CPT Links
- Cone penetration test - Wikipedia
- Geotechnical CPT on Wikipedia
- In-situ testing Research
- Dr.Paul W. Mayne
- Deep compaction of granular soils
- Article featuring CPT by Dr. K. Rainer Massarsch on Geoforum
- SourceForge.net: OpenSounding
- Open Source Software
- Cptu.eu - CPT information board
- Links to various CPT resources
CPT books
