EP0705941B1 - Two piezometers pressuremeter - Google Patents
Two piezometers pressuremeter Download PDFInfo
- Publication number
- EP0705941B1 EP0705941B1 EP94400638A EP94400638A EP0705941B1 EP 0705941 B1 EP0705941 B1 EP 0705941B1 EP 94400638 A EP94400638 A EP 94400638A EP 94400638 A EP94400638 A EP 94400638A EP 0705941 B1 EP0705941 B1 EP 0705941B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- tube
- pressure
- membrane
- piezometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012528 membrane Substances 0.000 claims description 46
- 239000011148 porous material Substances 0.000 claims description 26
- 239000002689 soil Substances 0.000 claims description 22
- 238000005553 drilling Methods 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 230000001413 cellular effect Effects 0.000 claims 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 2
- 230000000717 retained effect Effects 0.000 claims 1
- 210000004027 cell Anatomy 0.000 description 18
- 230000035515 penetration Effects 0.000 description 18
- 238000005259 measurement Methods 0.000 description 15
- 239000000523 sample Substances 0.000 description 13
- 238000009434 installation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000004575 stone Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000005056 compaction Methods 0.000 description 6
- 239000004459 forage Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/008—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/027—Investigation of foundation soil in situ before construction work by investigating properties relating to fluids in the soil, e.g. pore-water pressure, permeability
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/006—Measuring wall stresses in the borehole
Definitions
- This device has the same advantages and the same defects as the one described (2.1) but the rework in this case is the result of repression.
- the device consists of a single cell probe preceded by a thin-walled corer carrying the membrane cell of measured.
- the English device additionally includes a pressure sensor interstitial in the middle of the membrane cell, this membrane cell is fitted with springs with gauges deformations.
- the device object of the invention can be in two categories based on the method of implementing the probe.
- Type I Piezoinclined diaphragm diaphragm device
- Type II Membrane apparatus for piezo-inclined drilling
- the porous stone of the piezometer (5) is fitted by a cylinder (10) which serves to prevent clogging during penetration of the system and to avoid the re-entry of small grains of soil in the piston oil chamber (13) (8).
- the space (20) allows the establishment of links (14).
- the pressurized fluid flowing in the pipeline (2) prevents displacement of the cylinder (10) relative to the porous piezometer stone (5).
- the pressurized fluid flowing in the pipeline (2) prevents displacement of the cylinder (10) relative to the porous piezometer stone (5).
- the piezometer (5) approaches level (6), it emerges from cylinder (10) which remains in place by the effect of the link (14).
- the maneuvering tube (12) containing the piezometer (5) continues to run up to level (6).
- the fluid in the pipe (2) is evacuated through the porous stone of the piezometer (5).
- the operating tube (12) of the piston (8) fits into the cylinder (10) and drives it in its movement.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Soil Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Geophysics (AREA)
- Measuring Fluid Pressure (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Description
Différents essais in-situ sont utilisés pour étudier les
caractéristiques de mécanique du sol, ainsi que la capacité
portante et le tassement du sol dont :
Ce type d'experience consiste à utiliser un tube vertical,
dont l'extremité contient un capteur de force et un autre de
la pression interstitielle.
La méthode de mise en oeuvre s'effectue de la manière
suivante:
- Faire pénétrer le tube vertical dans le sol avec une vitesse connue.
- Au cours de la pénétration et à chaque 20 cms de profondeur, on enregistre la mesure de résistance du sol contre la pénétration du tube et ainsi, la mesure de la pression interstitielle.
The implementation method is carried out as follows:
- Make the vertical tube penetrate the ground with a known speed.
- During penetration and at every 20 cm depth, the measure of resistance of the soil against the penetration of the tube is recorded and thus, the measurement of pore pressure.
Alors dans ce type d'experiènce, touts les mesures sont en fonction de la pénétration, et la vitesse de pénétration est un facteur de la méthode de mise en oeuvre.So in this type of experience, all the measures are in function of penetration, and the speed of penetration is a factor of the method of implementation.
L'inconvénient de ce type d'experiènce est qu'il :
En conséquence, la mesure de la pression interstitielle au
cours des experiènces de pénétration manque de précision et
se heurte au problème du colmatage.
Or, on ne peut pas admettre des mesures de la pression
interstitielle en fonction de la résistance du sol au cours
de pénétration pour déterminer la capacité portante et le
tassement du sol. Consequently, the measurement of the pore pressure during penetration experiments lacks precision and comes up against the problem of clogging.
However, it is not possible to accept measurements of the pore pressure as a function of the resistance of the soil during penetration to determine the bearing capacity and the compaction of the soil.
Il existe trois catégories de pressiomètre reposant sur leur
methode de mise en oeuvre:
C'est une sonde à trois cellules installé dans une cavité. La sonde est alimenteé par un liquide sous pression. L'augmentation de la pression de ce liquide fait gonfler la sonde. Pour chaque mètre de profondeur, on détermine la capacité portante et le tassement du sol par la relation entre les mesures de changement de la pression antérieur et le changement du volume de la cellule centrale de mesure.It is a three cell probe installed in a cavity. The probe is supplied by a pressurized liquid. The increase the pressure of this liquid causes the probe to swell. For each meter deep, we determine the capacity load bearing and soil compaction by the relationship between previous pressure change measurements and the change in the volume of the central measuring cell.
L'inconvénient de ce type d'appareils :
Pénétration dans le sol par l'intermédiaire de tube vertical terminé par une sonde mono-cellulaire à membrane alimentée par un liquide sous pression.Penetration into the soil via vertical tube terminated by a single cell membrane fed probe by a pressurized liquid.
Pour chaque mètre de profondeur on arrète la pénétration du système pour déterminer la capacité portante et le tassement suivis des mêmes étappes de la précendente procédure.For each meter of depth, the penetration of the system for determining bearing capacity and settlement followed by the same steps of the above procedure.
Cet appareils a les mêmes avantages et les mêmes défauts que celui décrits (2.1) mais le remaniement dans ce cas est le résultat du refoulement.This device has the same advantages and the same defects as the one described (2.1) but the rework in this case is the result of repression.
L'appareil consiste d'une sonde mono-cellulaire précédé d'une carottier à paroi mince portant la cellule à membrane de mesure. The device consists of a single cell probe preceded by a thin-walled corer carrying the membrane cell of measured.
Il existe deux genres d'appareils :
- l'appareil français:
pressiomètre auto-foreur (PAF) du LCPC avec sa membrane soutenue par un liquide. - l'appareil anglais:
pressiomètre auto-foreur de Cambridge.
- the French apparatus:
LCPC self-drilling pressiometer (PAF) with its membrane supported by a liquid. - the English apparatus:
Cambridge self-drilling pressuremeter.
Les deux appareils s'accordent sur le principe, mais l'appareil anglais comprend en plus un capteur de la pression interstitielle au milieu de la cellule à membrane, cette cellule à membrane est équipé de ressorts avec des jauges des déformations.The two devices agree in principle, but the English device additionally includes a pressure sensor interstitial in the middle of the membrane cell, this membrane cell is fitted with springs with gauges deformations.
Ce deux genres d'appareils permet d'éliminer les inconvénients du remaniement du sol au contact de la sonde par le forage préalable ou par le refoulement à cuase de l'enfoncement.These two kinds of devices can eliminate disadvantages of reworking the soil on contact with the probe by pre-drilling or by tank discharge of the depression.
L'inconvénient de ce type d'appareils :
Je souhaitrais affirmer que :
Il est impossible de déterminer la capacité portante et le
tassement du sol par l'unique mesure de la pression
interstitielle. Mais, il faut mesurer des relations de chacun
de changements de la pression interstitielle et la résistance
du sol en fonction d'une charge exercée.
Ainsi,le but de l'appareil objet de la présente invention
est de construire et d'enregistrer les mesures des relations
entre les trois parametres suivantes:
- La pression du fluide alimentant la cellule à membrane.
- Le volume de la cellule à membrane.
- La pression interstitielle d'un élément, sa place est
précis avec certaines conditions pour que le mesures
s'accomodent avec la concept de la méthode scientifique
concernant l'appareil objet de la présente invention. Ces
conditions du placement du capteur de la pression
interstitielle ( piézomètre ) sont :
- a. au niveau des déformations maximales de la cellule à membrane.
- b. au voisinage de la cellule à membrane et en deça d'une distance de 10 cms.
It is impossible to determine the bearing capacity and the compaction of the soil by the sole measurement of pore pressure. But, one must measure relationships of each of changes in pore pressure and soil resistance as a function of a load exerted.
Thus, the aim of the apparatus which is the subject of the present invention is to construct and record the measurements of the relationships between the following three parameters:
- The pressure of the fluid supplying the membrane cell.
- The volume of the membrane cell.
- The pore pressure of an element, its place is precise with certain conditions so that the measurements can be accommodated with the concept of the scientific method relating to the apparatus which is the subject of the present invention. These conditions for the placement of the pore pressure sensor (piezometer) are:
- at. at the level of the maximum deformations of the membrane cell.
- b. in the vicinity of the membrane cell and within a distance of 10 cms.
Alors, si on compose l'invention d'un ensemble d'un des
appareils à membrane en parallel avec un des piézomètres
existants, et etant donné que, les piézomètres existants
peuvent etre classés en deux catégories :
On confirme que l'essentiel dans la conception de la présente
invention peut se résumer comme suit :
Le but du piston incliné est d'amener le capteur de la pression interstitielle (piézomètre) au voisinage de la cellule à membrane pour que le piézomètre soit au niveau des déformations maximales de la cellule et sur une distance supérieure ou égale au maximum au rayon de l'anneau plastique crée autour de la cavité.
The purpose of the inclined piston is to bring the pore pressure sensor (piezometer) in the vicinity of the membrane cell so that the piezometer is at the level of the maximum deformations of the cell and over a distance greater than or equal to the maximum of the radius of the plastic ring created around the cavity.
A la suite des explications qui précédent, il est à signaler que:
- Le piston incliné est une partie indivisible de l'appareil
objet de la présente invention (appareil à membrane à
piézo - incliné ) et son role est une partie de la méthode
de mise en oeuvre .
Le piston incliné est dimensioné sous le condition suivante :
Le déplacement du piston incliné ( double track ) est suffisamment long pour permettre au tube de manoeuvre du piston incliné d'amener le piézomètre, qui est fixé à son extrémité, jusau'à l'endroit précis. - On n'enregistre jamais les mesures de la pression interstitielle au cours de la pénétration ni du tube de manoeuvre du piston incliné ni de l'appareil objet de la présente invention .
- The inclined piston is an indivisible part of the device which is the subject of the present invention (piezo diaphragm device - inclined) and its role is a part of the implementation method.
The inclined piston is dimensioned under the following condition:
The displacement of the inclined piston (double track) is long enough to allow the operating tube of the inclined piston to bring the piezometer, which is fixed at its end, to the precise location. - One never records the measurements of the pore pressure during the penetration neither of the maneuvering tube of the inclined piston nor of the apparatus object of the present invention.
L'appareil objet de l'invention peut être en deux catégories reposant sur la méthode de mise en place de la sonde.The device object of the invention can be in two categories based on the method of implementing the probe.
Détails explicatifs des dessins de l'appareil objet de la
présente invention de type I : de page 1/4 à 4/4
- (7)
- : cellule à membrane.
- (18)
- : L'appareil objet de la présente invention à enfoncer de type I (appareil à membrane à enfoncé à piézo-incliné)
- (6)
- : Niveau de mesure . Ce niveau de mesure se répète tous les mètres par rapport à la surface du sol.
- (5)
- : Le piézomètre (pierre poreuse contient le capteur de la pression interstitielle)
- (8)
- : Piston à l'extrémité de son tube de manoeuvre (12) est le piézomètre (5)
- (15)
- : Ordinateur raccordé au piézomètre (5) pour enregistrer la pression interstitielle au niveau (6) au voisinage de la cellule à membrane (7) .
- (7)
- : membrane cell.
- (18)
- : The device which is the subject of the present invention for type I driving (piezo-tilted driving membrane device)
- (6)
- : Measurement level. This level of measurement is repeated every meter from the ground surface.
- (5)
- : The piezometer (porous stone contains the pore pressure sensor)
- (8)
- : Piston at the end of its operating tube (12) is the piezometer (5)
- (15)
- : Computer connected to the piezometer (5) to record the pore pressure at level (6) in the vicinity of the membrane cell (7).
Coupe verticale suivant S-S, montre:
- l'emplacement des coupes suivant A-A, B-B, C-C et D-D,
voir page page 3 / 4 - l'emplacement du détail (F),
voir page 4/4- (8)
- : piston incliné par rapport à l'axe
vertical du système
- canalisations (1), (3) :
- ressources de pression pour faire sortir et rentrer du tube de manoeuvre (12) du piston (8).
- canalisations (1), (3) :
- canalisation (2) :
- comprend deux voies :
- une pour raccorder le capteur dans le piézomètre (5) à l'ordinateur (15) (fig (1)).
- l'autre voie pour fournir du fluide sous pression qui nettoie la pierre poreuse du piézomètre (5)
- (20)
- : espace autour du piézomètre (5)
- (13)
- : la chambre d'huile du piston (8)
- (12)
- : le tube de manoeuvre du piston (8) qui glisse autour d'un tube fixe (17).
- the location of the cuts according to AA, BB, CC and DD, see
page page 3/4 - the location of the detail (F), see
page 4/4- (8)
- : piston inclined to the vertical axis of the system
- lines (1), (3):
- pressure resources for removing and returning from the operating tube (12) of the piston (8).
- lines (1), (3):
- pipeline (2):
- includes two ways:
- one to connect the sensor in the piezometer (5) to the computer (15) (fig (1)).
- the other way to supply pressurized fluid which cleans the porous stone of the piezometer (5)
- (20)
- : space around the piezometer (5)
- (13)
- : the piston oil chamber (8)
- (12)
- : the piston operating tube (8) which slides around a fixed tube (17).
page 3/4 : coupe suivant A-A , B-B, C-C, D-D.
- (16)
- : piéces d'etanchéietés.
- (10)
- : cylindre qui emboite la pierre poreuse du piézomètre(5).
- (14)
- : lien qui relie le cylindre (10) au systéme et est en longueur de 5 cm moins long que la longueur du tube de manoeuvre (12) du piston (8).
- (16)
- : sealing parts.
- (10)
- : cylinder which fits the porous stone of the piezometer (5).
- (14)
- : link which connects the cylinder (10) to the system and is 5 cm shorter in length than the length of the operating tube (12) of the piston (8).
L'appareil objet de l'invention de type (I), ( appareil à membrane à enfoncé à piézo - incliné ), contient quatre canalisations numérotées de (1) à (4) :
- (1)
- : Dans la canalisation (1) l'huile sous pression fait sotir le tube (12) de manoeuvre du piston (8) de sa place à une distance suffisante pour arriver au niveau (6); niveau de déformation maximale de la sonde pressiométrique (7).
- (2)
- : La canalisation (2) comprend deux voies :
- L'une pour contient un cable électrique qui joint le capteur du piézomètre (5) à un ordinateur (15) de l'enregistrement de la pression interstitielle.
- Dans l'autre voie passe un fluide sous pression qui assure le nettoyage de la pierre poreuse du piézomètre (5).
- (3)
- : La canalisation (3) contient l'huile sous pression permettant la retour du tube de manoeuvre (12) du piston (8) à sa position initiale.
- (4)
- : La canalisation (4) alimente la sonde pressiométrique (7) par ses ressources des chargements ( fluide sous pression ).
- (1)
- : In the pipeline (1) the pressurized oil causes the piston operating tube (12) to come out of its place at a sufficient distance to reach the level (6); maximum deformation level of the pressuremeter probe (7).
- (2)
- : The pipeline (2) has two channels:
- One for contains an electric cable which joins the piezometer sensor (5) to a computer (15) for recording the pore pressure.
- In the other way passes a pressurized fluid which cleans the porous stone of the piezometer (5).
- (3)
- : The line (3) contains the pressurized oil allowing the return of the operating tube (12) of the piston (8) to its initial position.
- (4)
- : The pipe (4) supplies the pressuremeter probe (7) with its loading resources (fluid under pressure).
La pierre poreuse du piézomètre (5) est emboitée par un cylindre (10) qui sert à éviter le colmatage pendant la pénétration du système ainsi qu'à éviter la rentrée des petits grains du sol dans la chambre (13) d'huile du piston (8).The porous stone of the piezometer (5) is fitted by a cylinder (10) which serves to prevent clogging during penetration of the system and to avoid the re-entry of small grains of soil in the piston oil chamber (13) (8).
L'espace (20) permet la mise en place des liens (14).The space (20) allows the establishment of links (14).
Le fluide sous pression circulant dans la canalisation (2) évite le déplacement du cylindre (10) par rapport à la pierre poreuse du piézomètre (5). Lors du mouvement ou le piézomètre (5) s'approche du niveau (6), elle se dégage du cylindre (10) qui reste sur place par l'effet du lien (14).The pressurized fluid flowing in the pipeline (2) prevents displacement of the cylinder (10) relative to the porous piezometer stone (5). During the movement or the piezometer (5) approaches level (6), it emerges from cylinder (10) which remains in place by the effect of the link (14).
Le tube de manoeuvre (12) contenant le piézomètre (5)
continue sa course jusqu'au niveau (6). Le fluide dans la
canalisation (2) s'évacue à travérs la pierre poreuse du
piézomètre (5).
Dans son mouvement de retour à sa position initiale, le tube
de manoeuvre (12) du piston (8) s'emboite dans le cylindre
(10) et l'entraine dans son mouvement.The maneuvering tube (12) containing the piezometer (5) continues to run up to level (6). The fluid in the pipe (2) is evacuated through the porous stone of the piezometer (5).
In its movement back to its initial position, the operating tube (12) of the piston (8) fits into the cylinder (10) and drives it in its movement.
Claims (5)
- A system of measuring the soil mechanical characteristics copmrises pushing or drilling vertically a cellular membrane in which one introduces a liquid under pressure so as to measure the cellular membrane volume increase as a function of the applied pressure; characterized in that said system comprising the introduction in the soil from the part just above the membrane cell and following an inclined direction, a pressure sensor be directed to the position of the maximum deformation level of the membrane cell so that, one measures the pressure changes in the sensor at level (6) as a function of the applied pressure in the membrane cell (7) in a way to measure the soil pore water pressure in the vicinity of the membrane cell (7).
- A system to measure the mechanical characteristics of the soil as defined in claim 1 of the type with a vertical tube the intermediate which is provided with a cellular membrane (7), characterized in that said system comprises a sheath equipped by an inclined piston (8) relative to the intermediate vertical tube axe. At the edge of the manoeuvre pivot tube of piston (8), a piezometer (5) is provided with a pore water pressure sensor and a hydraulic element to avoid getting plugged up.
- A system as defined in claim 2 characterized in that said system comprises the cellular membrane (7) being supplied by pressure through intermediate tube that comprises also three pipelines; pipelines (1,3) under pressure distinated to make the piston (8) manoeuvre tube (12) go out and return back, the pipeline (2) is double track, one to attatch the pore pressure sensor to a recording computer (15) and the other is to supply with fluid under pressure to assure that piezometer (5) is not getting plugged up.
- A system as defined in claims 2 or 3 characterized in that said system comprises, pipeline (2) is surrounded by a fixed tube (17) to protect it from the influence of the pressure in the oil chamber (13) of the inclined piston (8).
- A system as defined in any of the claims 2 until 4 characterized in that said system comprises, the piezometer (5) that is provided by a protection cylinder (10) and is retained by bonds (14).
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9211210A FR2696003B1 (en) | 1992-09-21 | 1992-09-21 | Method and device for measuring mechanical characteristics of the soil. |
DE1994624787 DE69424787T2 (en) | 1994-03-24 | 1994-03-24 | Pressiometer with two piezometers |
EP94400638A EP0705941B1 (en) | 1992-09-21 | 1994-03-24 | Two piezometers pressuremeter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9211210A FR2696003B1 (en) | 1992-09-21 | 1992-09-21 | Method and device for measuring mechanical characteristics of the soil. |
EP94400638A EP0705941B1 (en) | 1992-09-21 | 1994-03-24 | Two piezometers pressuremeter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0705941A1 EP0705941A1 (en) | 1996-04-10 |
EP0705941B1 true EP0705941B1 (en) | 2000-05-31 |
Family
ID=26137482
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94400638A Expired - Lifetime EP0705941B1 (en) | 1992-09-21 | 1994-03-24 | Two piezometers pressuremeter |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0705941B1 (en) |
FR (1) | FR2696003B1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2375398A (en) * | 2001-05-11 | 2002-11-13 | Local Link Internat Ltd | Piezometric pressure sensor |
WO2003029614A2 (en) * | 2001-09-28 | 2003-04-10 | Shell Internationale Research Maatschappij B.V. | Tool and method for measuring properties of an earth formation surrounding a borehole |
BE1019322A3 (en) | 2010-04-30 | 2012-06-05 | Iskander Khalil Fahmy | METHOD AND DEVICE FOR MEASURING THE MECHANICAL CHARACTERISTICS OF SOIL. |
CN114295810B (en) * | 2021-12-31 | 2024-01-12 | 深圳大学 | Device and method for measuring outdoor soil water storage capacity |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2303727A (en) * | 1941-06-10 | 1942-12-01 | Leslie A Douglas | Means for testing underground strata for the fluid content thereof |
NL7301924A (en) * | 1973-02-09 | 1974-08-13 | ||
US3858441A (en) * | 1973-07-12 | 1975-01-07 | Henri Jules Comeau | Soil testing apparatus |
US4408481A (en) * | 1982-03-12 | 1983-10-11 | The United States Of America As Represented By The Secretary Of The Air Force | Pore pressure probe assembly and two-stage emplacement thereof |
FR2631654B1 (en) * | 1988-05-19 | 1990-08-24 | Rech Geolog Miniere | METHOD AND APPARATUS FOR MEASURING INTERSTITIAL PRESSURE IN SATURATED SOIL |
-
1992
- 1992-09-21 FR FR9211210A patent/FR2696003B1/en not_active Expired - Fee Related
-
1994
- 1994-03-24 EP EP94400638A patent/EP0705941B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2696003A1 (en) | 1994-03-25 |
EP0705941A1 (en) | 1996-04-10 |
FR2696003B1 (en) | 1995-03-03 |
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