CEN/TC 341/WG 5 - Borehole expansion tests

This document is applicable to pressuremeter tests using cylindrical flexible probes placed in pre-existent boreholes using testing procedures other than the Menard procedure.
Pressuremeter tests following the Menard procedure are provided in ISO 22476-4.
NOTE          A high-pressure flexible pressuremeter probe which contains transducers for the measurement of radial displacements is also known as flexible dilatometer probe or high-pressure dilatometer probe.
This document applies to tests performed in any kind of grounds, starting from soils, treated or untreated fills, hard soils and soft rocks, up to hard and very hard rocks, either on land or offshore.
The parameters derived from this test can include stiffness, strength, initial in-situ stress state and consolidation properties.

This document specifies equipment requirements, the execution of and reporting on the Ménard pressuremeter test.
This document describes the procedure for conducting a Ménard pressuremeter test in natural grounds, treated or untreated fills, either on land or off-shore.
The pressuremeter tests results of this document are suited to a quantitative determination of ground strength and deformation parameters. They can yield lithological information in conjunction with measuring while drilling performed when creating the borehole (according to ISO 22476-15). They can also be combined with direct investigation (e.g. sampling according to ISO 22475-1) or compared with other in situ tests (see EN 1997-2).

This document specifies the equipment requirements, execution of and reporting on self-boring pressuremeter (SBP) tests.
NOTE       This document fulfils the requirements for self-boring pressuremeter test as part of the geotechnical investigation services according to EN 1997-1 and EN 1997-2.
Tests with the self-boring pressuremeter cover the measurement in situ of the deformation of soils and weak rocks by the expansion and contraction of a cylindrical flexible membrane under pressure.

This document specifies the equipment requirements, execution of and reporting on full displacement pressuremeter (FDP) tests.
NOTE       This document fulfils the requirements for full displacement pressurementer test as part of the geotechnical investigation services according to EN 1997-1 and EN 1997-2.
Tests with the full displacement pressuremeter cover the measurement in situ of the deformation of soils and weak rocks by the expansion/contraction of a cylindrical flexible membrane under pressure.

ISO 22476-7:2012 specifies the equipment requirements, execution of and reporting on borehole jack tests.
It specifies the procedure for conducting a borehole jack test in ground stiff enough not to be adversely affected by the drilling operation. Two diametral cylindrical steel loading plates are placed in the ground and opened by pressure. Pressure applied to, and associated opening of, the probe are measured and recorded so as to obtain a stress-displacement relationship of the ground for the range of the expected design stress.
ISO 22476-7:2012 applies to test depths of  < 100 m and to testing either on land or off-shore.

This European standard specifies requirements for indirect ground investigations of soil by borehole expansion tests within the scope of the geotechnical investigations and testing in accordance with ENV 1997. The purpose of this European standard is to eliminate as far as possible erroneous assessments of subsoil conditions as well as to limit scatter when repeating tests and improve reproducibility when undertaking borehole expansion testing.

ISO 22476-5:2012 specifies the equipment requirements, execution of and reporting on flexible dilatometer tests.
ISO 22476-5:2012 is applicable to tests in ground stiff enough not to be adversely affected by the drilling operation.
ISO 22476-5:2012 is applicable to four procedures for conducting a test with the flexible dilatometer.
ISO 22476-5:2012 applies to tests performed up to 1 800 m depth. Testing can be conducted either on land or off-shore.

This document deals with equipment requirements, the execution of and reporting on the Ménard pressurermeter test as part of geotechnical investigation and testing according to EN 1997-1 and EN 1997-2.
The present document describes the procedure for conducting a Ménard pressuremeter test in natural soils, treated or untreated fills and in soft rocks, either on land or off-shore.