FR2746187A1 - Soil injection monitoring process - Google Patents
Soil injection monitoring process Download PDFInfo
- Publication number
- FR2746187A1 FR2746187A1 FR9603295A FR9603295A FR2746187A1 FR 2746187 A1 FR2746187 A1 FR 2746187A1 FR 9603295 A FR9603295 A FR 9603295A FR 9603295 A FR9603295 A FR 9603295A FR 2746187 A1 FR2746187 A1 FR 2746187A1
- Authority
- FR
- France
- Prior art keywords
- ground
- soil
- tongues
- different points
- cables
- 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.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 title claims abstract description 6
- 238000002347 injection Methods 0.000 title claims description 12
- 239000007924 injection Substances 0.000 title claims description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 210000002105 tongue Anatomy 0.000 claims abstract description 8
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 4
- 239000004417 polycarbonate Substances 0.000 claims abstract description 4
- 239000011347 resin Substances 0.000 claims abstract description 4
- 229920005989 resin Polymers 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 239000004115 Sodium Silicate Substances 0.000 abstract description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052911 sodium silicate Inorganic materials 0.000 abstract description 3
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 3
- 239000010935 stainless steel Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract 1
- 238000004441 surface measurement Methods 0.000 abstract 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 8
- 230000007423 decrease Effects 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000005370 electroosmosis Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 235000019351 sodium silicates Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
- E21B47/10—Locating fluid leaks, intrusions or movements
- E21B47/113—Locating fluid leaks, intrusions or movements using electrical indications; using light radiations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Structural Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Remote Sensing (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
PROCEDE ET APPAREILLAGE POUR LA SURVEILLANCE DE
L'INJECTION D'UN PRODUIT CONSOLIDANT DANS UN SOL
La présente invention concerne la technique de la consolidation et de l'imperméabilisation des sole, an particulier des sols argileux, par injection de produits tels que les silicates de sodium et analogues. On rappelle, sans avoir besoin d'entrer dans le détail, que le principe de cette technique est basé sur le fait que le silicate injecté remplace l'eau du sol par électro-osmose et électromigration, polymérise et devient solide.METHOD AND APPARATUS FOR MONITORING
INJECTION OF A CONSOLIDATING PRODUCT INTO SOIL
The present invention relates to the technique of consolidating and waterproofing sole, in particular clay soils, by injecting products such as sodium silicates and the like. It will be recalled, without having to go into detail, that the principle of this technique is based on the fact that the injected silicate replaces the water in the soil by electro-osmosis and electromigration, polymerizes and becomes solid.
Cette injection peut s'effectuer par mise sous pression ou par électroinjection. Dans les deux cas il est nécessaire de suivre le front d'injection pour pouvoir obtenir un traitement homogène et ne traiter que la zone visée. This injection can be carried out by pressurization or by electroinjection. In both cases it is necessary to follow the injection front in order to be able to obtain a homogeneous treatment and only treat the targeted area.
Dans le cas d'injection sous pression, on ne peut guère contrôler que la pression et le volume d'injection, ce qui n'indique pas quelle est la répartition précise du silicate dans la zone traitée. On n'a ainsi aucune garantie que toute la zone souhaitée aura été traitée, ni que la partie traitée l'aura été de façon homogène. In the case of injection under pressure, one can hardly control that the pressure and the volume of injection, which does not indicate what is the precise distribution of the silicate in the treated area. There is therefore no guarantee that the entire desired area will have been treated, or that the treated area will have been treated in a homogeneous manner.
Dans le cas de l'électroinjection, on se heurte aux mêmes difficultés, avec en outre le risque que le front de silicate ait envahi l'une des électrodes, à savoir la cathode, de façon prématurée à un niveau donné, c'est-à-dire avec une avance notable par rapport à la progression du front de silicate aux autres niveaux. Il en résulte qu'au niveau considéré une cristallisation du silicate pourra provoquer l'arrêt total de l'électroinjection. In the case of electroinjection, the same difficulties are encountered, with the risk that the silicate front has invaded one of the electrodes, namely the cathode, prematurely at a given level, that is to say ie with a significant advance compared to the progression of the silicate front on the other levels. As a result, at the level considered, crystallization of the silicate may cause the complete electroinjection to stop.
Le but de la présente invention est d'éviter ces inconvénients, et de proposer un procédé de surveillance de la progression du front de silicate en un certain nombre de points de la zone d'injection, que celle-ci soit assurée par injection sous pression ou par électroinjection. The object of the present invention is to avoid these drawbacks, and to propose a method for monitoring the progress of the silicate front at a certain number of points in the injection zone, whether this is ensured by injection under pressure. or by electroinjection.
A cet effet, un procédé conforme à la présente invention, pour la surveillance de la progression d'un front d'injection dans une zone de traitement de sol destinée à être consolidée et imperméabilisée, est caractérisé par une mesure de la résistance du sol entre différents points d'un maillage prédéfini. To this end, a method according to the present invention, for monitoring the progress of an injection front in a soil treatment zone intended to be consolidated and waterproofed, is characterized by a measurement of the resistance of the soil between different points of a predefined mesh.
On a en effet constaté que la résistance électrique d'un matériau (argile, sable, etc.) diminue quand la proportion du produit de traitement qutil contient (comme le silicate de sodium) augmente. Ainsi, en mesurant la résistance du sol entre différents points d'un maillage prédéfini, on pourra obtenir une bonne représentation de la pénétration et de la répartition du silicate dans le sol traité. It has in fact been observed that the electrical resistance of a material (clay, sand, etc.) decreases when the proportion of the treatment product that it contains (such as sodium silicate) increases. Thus, by measuring the resistance of the soil between different points of a predefined mesh, it will be possible to obtain a good representation of the penetration and of the distribution of the silicate in the treated soil.
De préférence, lesdits différents points sont répartis dans le sol selon un maillage tridimensionnel, ce qui permet d'obtenir une représentation de la répartition du produit de consolidation dans le sol en projection horizontale à différents niveaux de profondeur. Preferably, said different points are distributed in the ground in a three-dimensional mesh, which makes it possible to obtain a representation of the distribution of the consolidation product in the ground in horizontal projection at different depth levels.
La présente invention concerne également un appareillage de mesure pour la mise en oeuvre du procédé qui vient d'être décrit. The present invention also relates to a measuring apparatus for implementing the method which has just been described.
Selon l'invention, un tel appareillage est caractérisé en ce qu'il comporte un ensemble de cannes propres à être enfoncées dans le sol aux différents points dudit maillage prédéfini, et dont chacune porte en différents emplacements de sa longueur des languettes conductrices, chacune reliée par un câble isolé à une borne de mesure accessible en surface. According to the invention, such an apparatus is characterized in that it comprises a set of rods suitable for being driven into the ground at the various points of said predefined mesh, and each of which carries at different locations along its length conductive tabs, each connected by an insulated cable to a measuring terminal accessible on the surface.
Avantageusement, une canne est constituée dtun tube rigide à la surface extérieure duquel sont fixées lesdites languettes, lesdits câbles isolés associés chacun à une languette s'étendant à l'intérieur dudit tube puis traversant son fond supérieur en direction de la surface du sol, l'ensemble des bornes de mesure étant repérables et disposées de sorte à pouvoir être explorées automatiquement par un commutateur. Advantageously, a rod is made up of a rigid tube on the external surface of which said tabs are fixed, said insulated cables each associated with a tab extending inside said tube then crossing its upper bottom in the direction of the ground surface, l 'the set of measurement terminals being identifiable and arranged so that they can be automatically explored by a switch.
Sur le plan de la réalisation pratique, on peut prévoir par exemple que lesdits tubes sont en polycarbonats et que ses câbles internes sont noyés dans une résine d'étanchéité, les languettes étant en acier inoxydable. In terms of practical implementation, it can be provided for example that said tubes are made of polycarbonates and that its internal cables are embedded in a sealing resin, the tongues being made of stainless steel.
Ainsi, on prend toute précaution pour mesurer exactement la résistance du sol à chaque fois entre deux languettes portées par deux tubes différents, selon toutes combinaisons souhaitables, et en évitant les fuites de courant, même si le sol est très humide. Thus, every precaution is taken to measure the resistance of the soil exactly each time between two tabs carried by two different tubes, in any desirable combination, and avoiding current leaks, even if the soil is very wet.
Un mode d'exécution de l'invention va maintenant être décrit à titre d'exemple nullement limitatif avec référence aux figures du dessin annexé dans lequel
- la figure 1 est un diagramme montrant la résistance drun sol, entre deux points donnés, en fonction de sa concentration en silicate de sodium, supposée homogène ; et
- la figure 2 représente schématiquement un appareillage conforme à la présente invention.An embodiment of the invention will now be described by way of non-limiting example with reference to the figures of the accompanying drawing in which
- Figure 1 is a diagram showing the resistance of a soil, between two given points, as a function of its concentration of sodium silicate, assumed to be homogeneous; and
- Figure 2 schematically shows an apparatus according to the present invention.
Sur la figure 1 on a pris l'hypothèse d'un sol kaolin. Le diagramme montre que la résistance électrique du sol diminue rapidement entre les concentrations O et 100 l/m3, diminue peu entre 100 et 200 et se stabilise au-del*. In Figure 1 we have assumed a kaolin soil. The diagram shows that the electrical resistance of the soil decreases rapidly between concentrations O and 100 l / m3, decreases little between 100 and 200 and stabilizes beyond *.
Chaque mesure de résistance indiquera donc une concentration donnée.Each resistance measurement will therefore indicate a given concentration.
On comprend que le principe de l'invention, tel qu'exposé plus haut, est basé sur ce phénomène. It is understood that the principle of the invention, as explained above, is based on this phenomenon.
La figure 2 montre un type d'appareillage utilisable pour la mise en oeuvre de ce procédé. I1 comporte en tant que support une canne en forme de tube de polycarbonate 1 portant extérieurement et à différentes hauteurs des languettes conductrices 2, par exemple en acier inoxydable. FIG. 2 shows a type of apparatus usable for the implementation of this method. I1 comprises as support a cane in the form of a polycarbonate tube 1 carrying externally and at different heights conductive tabs 2, for example made of stainless steel.
Ces languettes sont chacune reliées à un câble conducteur isolé 3, le faisceau des câbles 3 passant à l'intérieur du tube 1 et étant noyé dans une résine d'étanchéité 4. Après avoir traversé le fond 5 du tube 1, les câbles 3 rejoignent la surface et sont connectés à un ensemble de bornes repérées 6. Grâce à un commutateur manuel ou automatique, on peut ainsi effectuer les mesures de résistance voulues entre les languettes de deux cannes prédéterminées du maillage, les différentes combinaisons de mesures, éventuellement traitées par ordinateur, donnant alors l'image tridimensionnelle d'imprégnation du sol en silicate, au cours, notan- ment, d'une opération d'injection sous pression ou d'élec troinjection. These tongues are each connected to an insulated conductive cable 3, the bundle of cables 3 passing inside the tube 1 and being embedded in a sealing resin 4. After having crossed the bottom 5 of the tube 1, the cables 3 join the surface and are connected to a set of terminals marked 6. Thanks to a manual or automatic switch, it is thus possible to carry out the desired resistance measurements between the tongues of two predetermined rods of the mesh, the different combinations of measurements, possibly processed by computer , thus giving the three-dimensional image of impregnating the silicate soil, in particular during a pressure injection or electro-injection operation.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9603295A FR2746187A1 (en) | 1996-03-15 | 1996-03-15 | Soil injection monitoring process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9603295A FR2746187A1 (en) | 1996-03-15 | 1996-03-15 | Soil injection monitoring process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2746187A1 true FR2746187A1 (en) | 1997-09-19 |
Family
ID=9490229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9603295A Pending FR2746187A1 (en) | 1996-03-15 | 1996-03-15 | Soil injection monitoring process |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2746187A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1034067C2 (en) * | 2007-06-29 | 2008-12-30 | B & P Bodeminjectie B V | Method for applying an underground plate-shaped construction. |
| CN113373989A (en) * | 2021-06-04 | 2021-09-10 | 吉林建筑大学 | Foundation slip casting expansion tester |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2524145A1 (en) * | 1982-03-24 | 1983-09-30 | Teiesu Gijutsu Kk | METHOD AND APPARATUS FOR CONTROLLING THE INJECTION AREA OF A SOIL CEMENTING AGENT DURING A SOIL STABILIZATION PROCESS |
| GB2128335A (en) * | 1982-08-13 | 1984-04-26 | Omnium Assets Trust Syndicate | Measuring conductivity of a soil sample |
| US4652811A (en) * | 1983-05-03 | 1987-03-24 | K.I.T. (Medidot) Ltd. | Method for measuring liquid content in a porous medium such as soil |
| WO1991006854A1 (en) * | 1989-11-04 | 1991-05-16 | Natural Environment Research Council | Method for use in assessing the physical state of ground materials and apparatus for use therein |
| FR2700019A1 (en) * | 1992-12-28 | 1994-07-01 | Techsol | Resistivity exploration and concrete injection control processes |
| US5357202A (en) * | 1991-12-19 | 1994-10-18 | Henderson Michael E | Plural electrode method for measuring subsurface changes in conductivity as an indication of fluid migration |
-
1996
- 1996-03-15 FR FR9603295A patent/FR2746187A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2524145A1 (en) * | 1982-03-24 | 1983-09-30 | Teiesu Gijutsu Kk | METHOD AND APPARATUS FOR CONTROLLING THE INJECTION AREA OF A SOIL CEMENTING AGENT DURING A SOIL STABILIZATION PROCESS |
| GB2128335A (en) * | 1982-08-13 | 1984-04-26 | Omnium Assets Trust Syndicate | Measuring conductivity of a soil sample |
| US4652811A (en) * | 1983-05-03 | 1987-03-24 | K.I.T. (Medidot) Ltd. | Method for measuring liquid content in a porous medium such as soil |
| WO1991006854A1 (en) * | 1989-11-04 | 1991-05-16 | Natural Environment Research Council | Method for use in assessing the physical state of ground materials and apparatus for use therein |
| US5357202A (en) * | 1991-12-19 | 1994-10-18 | Henderson Michael E | Plural electrode method for measuring subsurface changes in conductivity as an indication of fluid migration |
| FR2700019A1 (en) * | 1992-12-28 | 1994-07-01 | Techsol | Resistivity exploration and concrete injection control processes |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1034067C2 (en) * | 2007-06-29 | 2008-12-30 | B & P Bodeminjectie B V | Method for applying an underground plate-shaped construction. |
| EP2009225A1 (en) * | 2007-06-29 | 2008-12-31 | B & P Bodeminjectie B.V. | Method for providing a slab-shaped underground structure |
| CN113373989A (en) * | 2021-06-04 | 2021-09-10 | 吉林建筑大学 | Foundation slip casting expansion tester |
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