NF EN ISO 22476-7

NF EN ISO 22476-7

March 2013
Standard Current

Geotechnical investigation and testing - Field testing - Part 7 : borehole jack test

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.

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Main informations

Collections

National standards and national normative documents

Publication date

March 2013

Number of pages

33 p.

Reference

NF EN ISO 22476-7

ICS Codes

93.020   Earthworks. Excavations. Foundation construction. Underground works

Classification index

P94-521-7

Print number

1 - 04/03/2013

International kinship

ISO 22476-7:2012

European kinship

EN ISO 22476-7:2012
Sumary
Geotechnical investigation and testing - Field testing - Part 7 : borehole jack test

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.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes, définitions et symboles
    1
  • 3.1 Termes et définitions
    1
  • 3.2 Symboles et abréviations
    2
  • 4 Appareillage
    3
  • 5 Mode opératoire
    8
  • 5.1 Étalonnage du dispositif d'essai
    8
  • 5.2 Forage de la cavité et mise en place du dispositif
    8
  • 5.3 Programme de chargement
    9
  • 5.4 Remblayage du trou de forage
    10
  • 5.5 Exigences de sécurité
    10
  • 6 Résultats d'essai
    11
  • 6.1 Équations de base
    11
  • 6.2 Essais de chargement
    11
  • 6.3 Essai de chargement sous contrainte constante
    12
  • 7 Rapport
    12
  • 7.1 Généralités
    12
  • 7.2 Rapport des résultats d'essai
    12
  • 7.3 Choix de la mise à l'échelle des axes
    14
  • 7.4 Présentation des résultats d'essai
    14
  • Annexe A (normative) Dimensions des sondes dilatométriques rigides et facteurs de forme du dispositif associés
    15
  • Annexe B (normative) Étalonnage et correction
    16
  • Annexe C (normative) Exemple de rapport du terrain
    17
  • Annexe D (informative) Exemple d'essai
    18
  • Annexe E (normative) Introduction de la sonde dilatométrique rigide dans le terrain
    20
  • Annexe F (normative) Résolutions et incertitudes
    22
  • Bibliographie
    23
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