NA 005

DIN Standards Committee Building and Civil Engineering

Project

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

NA 005-05-09 AA - Ground; field tests (national mirror committee for ISO/TC 182/WG 2, WG 5, WG 6, WG 7 und WG 8)  

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
Order from Beuth Verlag

Contact

M. Eng.

Ulrich Wittchow

Am DIN-Platz, Burggrafenstr. 6
10787 Berlin

Tel.: +49 30 2601-2627
Fax: +49 30 2601-42627

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