UNE EN ISO 22476-16:2025
Geotechnical investigation and testing - Field testing - Part 16: Borehole shear test (ISO 22476-16:2024)
Investigación y ensayos geotécnicos. Ensayos de campo. Parte 16: Ensayo de corte en sondeo. (ISO 22476-16:2024).
| Označení normy: | UNE EN ISO 22476-16:2025 |
| Počet stran: | 52 |
| Vydáno: | 2025-09-24 |
| Status: | Norma |
| Počet stran (Španělsky): | 56 |
UNE EN ISO 22476-16:2025
This Part of ISO 22476 is applicable to the borehole shear test using the Phicometer procedure, commonly named the phicometer test (etymologically derived from phi for friction angle, co for cohesion and meter for measurement). The test method covers a 4 steps procedure consisting of drilling a borehole, lowering the probe to the test depth, inflating it into the borehole wall and shearing the soil by applying a series of steps of controlled radial pressure and simultaneously pulling out the probe with a constant displacement rate. The test sequences are shown in figure 1. The test can be performed in all types of natural soils, fills and artificial soils, which can be saturated or not. It does not apply to very soft soils, soft clays, very loose soils, rocks, slightly altered rocks and natural or artificial soils with a predominance of cobbles having a particle diameter greater than 150 mm. Generally the test is applicable in soils with an order of magnitude of their in situ resistance characteristics as follows: Ménard pressuremeter limit pressure: 0,4 MPa < pLM < 3 5 MPa approximately or more than 4 MPa in granular non cohesive soils; CPT Cone resistance: 1,5 MPa
