1. https://data.geoscience.fr/ncl
  2. Proc
  3. _101
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Entry: Flat jack test

URI: https://data.geoscience.fr/ncl/Proc/101

The purpose of the test is the measurement of in situ stress. The testing technique is based on the release of the stress in a small area of a structure by a plane cut perpendicular to its surface. The flat jack is then loaded in the cut and the pressure is gradually increased by a hydraulic pump until the state of strain is equal to the previously existing condition before the cut.

Core metadata

is a geotechnical test | Process | Concept | in situ test | stress measurement process in aRock mass
category 14
submitted byHélène Bressan
accepted on 5 Aug 2021 09:30:12.419

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date accepted 5 Aug 2021 09:30:12.419
date submitted 5 Aug 2021 08:56:58.310
definition
entity Flat jack test
source graph graph

description
en The purpose of the test is the measurement of in situ stress. The testing technique is based on the release of the stress in a small area of a structure by a plane cut perpendicular to its surface. The flat jack is then loaded in the cut and the pressure is gradually increased by a hydraulic pump until the state of strain is equal to the previously existing condition before the cut.
fr L'essai a pour but la mesure de la contrainte in situ. La technique d’essai est basée sur la libération de la contrainte dans au sein d'un massif rocheux par une coupe plane perpendiculaire à sa surface. Le vérin plat est ensuite placé et chargé dans la saignée et la pression est progressivement augmentée par une pompe hydraulique jusqu’à ce que l’état de contrainte soit égal à la condition antérieure à la coupe.
item class in situ test | geotechnical test | stress measurement process in aRock mass | Process | Concept
label
en Flat jack test
fr Mesure des contraintes au vérin plat
notation 101
register Proc
status status stable
submitter
account name h.bressan@brgm.fr
name Hélène Bressan

type register item
version info 3
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Definition

category geotechnics
description
en The purpose of the test is the measurement of in situ stress. The testing technique is based on the release of the stress in a small area of a structure by a plane cut perpendicular to its surface. The flat jack is then loaded in the cut and the pressure is gradually increased by a hydraulic pump until the state of strain is equal to the previously existing condition before the cut.
fr L'essai a pour but la mesure de la contrainte in situ. La technique d’essai est basée sur la libération de la contrainte dans au sein d'un massif rocheux par une coupe plane perpendiculaire à sa surface. Le vérin plat est ensuite placé et chargé dans la saignée et la pression est progressivement augmentée par une pompe hydraulique jusqu’à ce que l’état de contrainte soit égal à la condition antérieure à la coupe.
in scheme Process
label
en Flat jack test
fr Mesure des contraintes au vérin plat
notation 101
pref label
en Flat jack test
fr Mesure des contraintes au vérin plat
status Valid
top concept of Process
type geotechnical test | Process | Concept | in situ test | stress measurement process in aRock mass

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