DIN Standards Committee Building and Civil Engineering
Geotechnical investigation and testing - Field testing - Part 16: Borehole shear test (ISO/FDIS 22476-16:2023); German and English version FprEN ISO 22476-16:2023
Abstract
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 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. This document applies only to tests carried out at a depth less than or equal to 30 m. In soft soils at great depths, the test may not be applicable. The parameters derived from this test are the shear strength properties: cohesion and friction angle.
Begin
2019-10-09
WI
00341133
Planned document number
DIN EN ISO 22476-16
Project number
00518760
Responsible national committee
Responsible european committee
CEN/TC 341 - Geotechnical Investigation and Testing
Responsible international committee
ISO/TC 182/WG 8 - Borehole expansion tests
draft standard
Geotechnical investigation and testing - Field testing - Part 16: Borehole shear test (ISO/DIS 22476-16:2023); German and English version prEN ISO 22476-16:2023
2023-04
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