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Pile CPT
NEN 6743
The NEN 6743 "Piled Foundations" standard determines the maximum pressure at pile toe pmax,toe from the corresponding i-th penetration test as follows:
| kde: | qc,I,m | - | mean of the cone tip resistance qc,I (see article 5.3.3.3 in NEN 6743 standard) |
| qc,II,m | - | mean of the minimum cone tip resistance qc,II (see article 5.3.3.3 in NEN 6743 standard) | |
| qc,III,m | - | mean of the cone tip resistance qc,III (see article 5.3.3.3 in NEN 6743 standard) | |
| αp | - | pile toe coefficient | |
| s | - | pile shape coefficient | |
| β | - | expanded pile toe coefficient |
The maximum pressure at pile toe pmax,toe is limited by the value of 15 MPa. In cohesionless soils the analysis takes into account the influence of overconsolidation (OCR).
The maximum shaft friction pmax,shaft is given by:
| where: | αs | - | shaft friction coefficient |
| qc,z,a | - | tip resistance at depth h |
Literature :
NEN 6743:1991/A1:1997, Geotechniek - Berekeningsmethode voor funderingen op palen - Drukpalen
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Company Fine develops structural engineering software with main focus on geotechnical software and structural engineering analyses.
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Společnost Fine se zabývá vývojem stavebního software, zejména programů na statické výpočty, zakládání staveb a geotechniku.
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