EP1553228B1 - Method of controlling the flow of water in an aquifer - Google Patents

Method of controlling the flow of water in an aquifer Download PDF

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Publication number
EP1553228B1
EP1553228B1 EP04292960A EP04292960A EP1553228B1 EP 1553228 B1 EP1553228 B1 EP 1553228B1 EP 04292960 A EP04292960 A EP 04292960A EP 04292960 A EP04292960 A EP 04292960A EP 1553228 B1 EP1553228 B1 EP 1553228B1
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EP
European Patent Office
Prior art keywords
trench
panels
barrier
panel
prefabricated
Prior art date
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Not-in-force
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EP04292960A
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German (de)
French (fr)
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EP1553228A1 (en
Inventor
Jean-Pierre Compagnie du Sol Hamelin
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Soletanche Freyssinet SA
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Soletanche Freyssinet SA
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Publication of EP1553228A1 publication Critical patent/EP1553228A1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/06—Restraining of underground water
    • E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/06—Restraining of underground water
    • E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material

Definitions

  • the present invention relates to a method for producing groundwater circulation control barriers and a barrier as obtained by the implementation of the method.
  • the invention relates to the production of an underground barrier which makes it possible to control the circulation of groundwater in a water flow zone and, more particularly, in the case where this barrier has to be realized. in terrain with karstic rocks with large cracks or hoses with large water circulation.
  • the walls may consist of molded walls made of concrete or plastic concrete which are obtained by first making a trench in the ground and filling the trench with concrete, excavated walls or vibrofoncés under self-hardening grout or still the prefabricated walls installed in grout.
  • this technique can not be used. Indeed, it is necessary that the walls of the trench ensure the containment of concrete or grout that is put in place. This confinement can not be obtained if the soil consists for example of karstic rocks with large cracks or hoses with large water circulation. It is understood that, because of the significant crevices of the rock, the concrete or grout will immediately flow out of the trench making it impossible to achieve the wall.
  • a method of making an underground barrier and such a barrier according to the preamble of claim 7 is disclosed in US 6,554,544 .
  • a first object of the present invention is to provide a method for the realization of underground barriers in terrain with significant crevices.
  • limited sealing it is meant that the seal is achieved, for example, with concrete or grout, only in the areas of the trench corresponding to its bottom and vertical end walls, and that the sealing means do not fill the entire trench.
  • Another advantage of the invention is that, some of the panels having a controllable opening, it is possible to maintain this opening in the open position during the execution of the work, which avoids the accumulation of water in the trench. course of realization of the barrier, this water can flow through the opening made in at least some of the panels.
  • At least a portion of the prefabricated panels consist of sheet piles.
  • At least a portion of the prefabricated panels consist of prefabricated concrete panels.
  • At least a portion of the prefabricated panels consists of plastic sheets, for example high density polyethylene (HDPE) with locks and their seal. These sheets can be reinforced by metal profiles concreted in plastic tubes integrated with said sheets.
  • HDPE high density polyethylene
  • Another object of the invention is a sealing barrier of the type obtained by the implementation of the method of the type defined above.
  • FIG. 1 there is shown a trench 10 in which a control barrier against the flow of water must be made.
  • This trench comprises a bottom 12, end side walls 14 and 16 and longitudinal vertical walls 18 and 20.
  • the trench is made in such a way that the bottom is in a layer of the soil free of crevices and the vertical end walls 14 and 16.
  • the longitudinal vertical walls 18 and 20 comprise crevices allowing an abundant flow of groundwater.
  • the trench 10 can be made entirely before the introduction of the panels or, preferably, it is made in sections of length a little longer than the length of the prefabricated panels.
  • a panel 22 made for example of reinforced concrete.
  • the panel 22 has a lower edge 24, an upper edge 26 and two vertical lateral edges 28 and 30.
  • the height H of the panel is equal to the height of the barrier that is to be made, and its width is equal to L.
  • the lateral edges 26 and 28 of the panel are provided with mechanical connection and sealing elements constituted, for example, by sheet piles 32 and 34. At least some of the panels 22 are provided with an opening constituting a window 36 equipped with shutter means not shown.
  • a first end panel 22 1 is put in place and a seal 40 in which the element 30 is engaged is made along the vertical wall 14 of the trench.
  • a seal 40 in which the element 30 is engaged is made along the vertical wall 14 of the trench.
  • the panel 22 1 which may consist of several sheet piles.
  • a seal 42 of the lower edge 24 of the panel on the bottom of the trench to thereby seal between the panel and the bottom of the trench.
  • the different panels 22 2 , etc. are successively put into place by engaging the mechanical and sealing connecting elements 30 and 32 constituted, for example, by sheet piles.
  • the last panel 22 n is equipped with a fastening and sealing element 32 'which is embedded in a seal 44 made against the end wall 16 of the trench.
  • the trench is filled by any suitable means.
  • some panels have an opening 36 provided with controllable sealing means.
  • the windows 36 are preferably left open so that the water entering the trench 10 can flow through the openings 36 and not flow into this trench due to the presence of the panels.
  • the windows 36 equipped with their shutter means remotely controllable that is to say from the surface of the ground, can be opened or closed or placed in an intermediate position to allow the passage of a controlled flow of groundwater on either side of the barrier formed by the panels 22.
  • the prefabricated panels used to make the barrier are elements made of concrete or reinforced concrete. It goes without saying that we can use other materials still corresponding to the definition of prefabricated panels. One could also use at least in part as prefabricated sheet piles engaged with each other. Preferably in this case, some specialized panels for example made of concrete would include openings 36 to allow a controlled flow of groundwater.
  • the prefabricated panels could also consist of plastic sheets, for example high density polyethylene (HDPE) with locks and their seal. These sheets can be reinforced by metal profiles concreted in plastic tubes integrated with said sheets.
  • HDPE high density polyethylene
  • some panels will be prefabricated panels or panels with a concrete metal structure and equipped with an opening provided with closure means.
  • FIGS. 3A to 3D show the different stages of the establishment of the end panel 22 '.
  • the trench 10 is shown in which the penultimate panel 22 is already fitted with its securing element 32.
  • the seal 44 made against the end wall 16 of the trench in which is fixed is also shown.
  • the fastening and sealing element 34 is also shown.
  • the panel 22 comprises a sheet metal structure which defines two vertical end boxes 54 and 56 provided with a vertical slot 58, 60. This metal structure also defines a window 62 and two vertical rails 64 and 66. The metal structure also comprises two tubular passages 68 and 70 which are connected to a vertical control line 72.
  • the panel 22 ' is placed in the trench 10 so that the T-ends 50 and 52 of the fastening elements penetrate the vertical boxes 54 and 56 of the panel through the slots 58 and 60.
  • the figure 3C shows that the caissons 54 and 56 are filled with concrete or grout, as well as the volumes limiting the slides 64 and 66. This secures the panel 22 'and makes the seal between this panel and the panel 22. and between this panel and the end wall 16 of the trench.
  • a sliding hatch 74 for closing the window 62 is placed in the slides 64 and 66.
  • the figure 4 shows the panel 22 'placed in the trench 10. It shows the seal 31 to seal between the bottom 12 of the trench and the lower edge 24' of the panel 22 '. This figure also shows the mobile hatch 74 equipped with a displacement control system 76.
  • tubular passages 68 and 70 which pass through the panel 22 'over its entire thickness. These passages 68 and 70 allow a flow of water through the panel. These tubular passages may be closed by a closure rod 78 mounted movably in the vertical tube 72.
  • the closure may be provided by one or more inflatable shutters, valves, or any other suitable means, mechanically, hydraulically or otherwise .

Abstract

The method involves making a trench (10) in the ground at a location where a barrier is to be enforced. Each of prefabricated panels (22 1-22 n) having a lower side, lateral vertical sides and an aperture (36) is installed in trench such that adjacent panels are integrated. The lower sides are tightened with the trench base, and free vertical sides of end panels are tightened with respective lateral end walls (14, 16) of the trench. An independent claim is also included for an underground barrier formed in a trench to control circulation of water in ground.

Description

La présente invention a pour objet un procédé de réalisation de barrières de contrôle de circulation des eaux souterraines et une barrière telle qu'obtenue par la mise en oeuvre du procédé.The present invention relates to a method for producing groundwater circulation control barriers and a barrier as obtained by the implementation of the method.

De façon plus précise l'invention concerne la réalisation d'une barrière souterraine qui permet de réaliser le contrôle de la circulation des eaux souterraines dans une zone d'écoulement d'eau et, plus particulièrement, dans le cas où cette barrière doit être réalisée dans un terrain comportant des roches de type karstique avec de grosses fissures ou des boyaux avec des circulations d'eau importantes.More specifically, the invention relates to the production of an underground barrier which makes it possible to control the circulation of groundwater in a water flow zone and, more particularly, in the case where this barrier has to be realized. in terrain with karstic rocks with large cracks or hoses with large water circulation.

La réalisation de barrages souterrains pour couper la circulation d'eau dans des terrains perméables fait appel à différentes techniques connues dans le domaine des fondations spéciales. On peut citer parmi celles-ci :

  • les injections ;
  • le jet grouting (injection sous pression) ;
  • les colonnes de sol mixé ; ou
  • les parois.
The construction of underground dams to cut off the flow of water in permeable terrain uses different techniques known in the field of special foundations. These include:
  • injections;
  • jet grouting (injection under pressure);
  • the columns of mixed soil; or
  • the walls.

En ce qui concerne les parois, elles peuvent consister en des parois moulées en béton ou en béton plastique qui sont obtenues en réalisant au préalable une tranchée dans le sol et en remplissant cette tranchée avec du béton, les parois excavées ou vibrofoncées sous coulis autodurcissant ou encore les parois préfabriquées installées dans du coulis.As regards the walls, they may consist of molded walls made of concrete or plastic concrete which are obtained by first making a trench in the ground and filling the trench with concrete, excavated walls or vibrofoncés under self-hardening grout or still the prefabricated walls installed in grout.

Quelle que soit la technique de parois considérée, leur réalisation nécessite le creusement d'une tranchée et le remplissage de cette tranchée avec du coulis ou du béton.Whatever the wall technique considered, their realization requires the digging of a trench and the filling of this trench with grout or concrete.

Dans certains terrains, cette technique ne peut pas être utilisée. En effet, il est nécessaire que les parois de la tranchée assurent le confinement du béton ou du coulis qui y est mis en place. Ce confinement ne peut être obtenu si le sol est constitué par exemple par des roches de type karstique présentant de grosses fissures ou des boyaux avec des circulations d'eau importantes. On comprend en effet que, en raison des anfractuosités importantes de la roche, le béton ou le coulis s'écoulera immédiatement hors de la tranchée rendant ainsi impossible la réalisation de la paroi.In some lands, this technique can not be used. Indeed, it is necessary that the walls of the trench ensure the containment of concrete or grout that is put in place. This confinement can not be obtained if the soil consists for example of karstic rocks with large cracks or hoses with large water circulation. It is understood that, because of the significant crevices of the rock, the concrete or grout will immediately flow out of the trench making it impossible to achieve the wall.

Un procédé de réalisation d'une barrière souterraine et une telle barrière selon le préambule de la revendication 7 est divulgué dans US 6 554 544 .A method of making an underground barrier and such a barrier according to the preamble of claim 7 is disclosed in US 6,554,544 .

Il existe donc un réel besoin de disposer d'un procédé de réalisation de barrières souterraines qui puissent s'adapter au type de terrains décrits ci-dessus.There is therefore a real need to have a method of making underground barriers that can adapt to the type of terrain described above.

Un premier objet de la présente invention est de fournir un procédé permettant la réalisation de barrières souterraines dans des terrains présentant des anfractuosités importantes.A first object of the present invention is to provide a method for the realization of underground barriers in terrain with significant crevices.

Pour atteindre ce but, selon l'invention, le procédé comprend les étapes suivantes :

  • on réalise une tranchée dans le sol à l'emplacement où la barrière doit être réalisée de telle manière que le fond de la tranchée soit dans une couche de terrain suffisamment imperméable ;
  • on fournit des panneaux préfabriqués, présentant un bord inférieur et deux bords latéraux verticaux équipés de moyens d'étanchéité mutuelle, certains desdits panneaux comportant une ouverture munie de moyens d'obturation commandables ;
  • on met en place dans la tranchée lesdits panneaux de telle manière qu'on réalise une solidarisation et une étanchéité entre deux panneaux adjacents ;
  • on réalise une première étanchéité limitée entre le bord inférieur de chaque panneau et le fond de la tranchée ; et
  • on réalise une deuxième étanchéité limitée entre le bord libre vertical de chaque panneau d'extrémité avec la paroi d'extrémité de la tranchée.
To achieve this object, according to the invention, the method comprises the following steps:
  • a trench is made in the soil where the barrier is to be constructed in such a way that the bottom of the trench is in a sufficiently impermeable layer of soil;
  • providing prefabricated panels having a bottom edge and two vertical side edges provided with mutual sealing means, some of said panels having an opening provided with controllable sealing means;
  • said panels are placed in the trench in such a way that a joining and sealing is achieved between two adjacent panels;
  • a first limited seal is made between the lower edge of each panel and the bottom of the trench; and
  • a second limited seal is made between the vertical free edge of each end panel with the end wall of the trench.

Par l'expression "étanchéité limitée", on veut dire que l'étanchéité est réalisée, par exemple, avec du béton ou du coulis, uniquement dans les zones de la tranchée correspondant à son fond et à ses parois verticales d'extrémité, et que les moyens d'étanchéité ne remplissent pas l'ensemble de la tranchée.By the term "limited sealing", it is meant that the seal is achieved, for example, with concrete or grout, only in the areas of the trench corresponding to its bottom and vertical end walls, and that the sealing means do not fill the entire trench.

On comprend que, grâce à l'invention, le problème lié à l'absence de confinement réalisé par la tranchée est résolu. En effet, les seules étanchéités à réaliser, le plus souvent par scellement avec un béton ou un coulis, concernent l'extrémité inférieure des panneaux et les bords verticaux des panneaux d'extrémité. Or, aussi bien le fond de la tranchée que les parois verticales d'extrémité de cette tranchée sont nécessairement dans des zones du sol dépourvues d'anfractuosités importantes. En revanche, il n'y a aucun scellement à base de béton ou de coulis à réaliser dans les zones susceptibles de comporter des anfractuosités importantes dans les parois verticales longitudinales de la tranchée initialement réalisées. En outre, les ouvertures commandables ménagées dans certains panneaux permettent de contrôler le débit d'eau souterraine à travers la barrière.It is understood that, thanks to the invention, the problem related to the absence of confinement made by the trench is solved. Indeed, the only seals to achieve, usually by sealing with a concrete or grout, concern the lower end of the panels and the vertical edges of the end panels. Now, both the bottom of the trench and the vertical end walls of this trench are necessarily in areas of the ground devoid of significant crevices. On the other hand, there is no cement-based grout to be made in the areas likely to have significant crevices in the longitudinal vertical walls of the trench initially made. In addition, the controllable openings in some panels control the flow of groundwater through the barrier.

Un autre avantage de l'invention est que, certains des panneaux comportant une ouverture commandable, il est possible de maintenir cette ouverture en position ouverte durant la réalisation des travaux, ce qui permet d'éviter l'accumulation d'eau dans la tranchée en cours de réalisation de la barrière, cette eau pouvant s'écouler par l'ouverture réalisée dans au moins certains des panneaux.Another advantage of the invention is that, some of the panels having a controllable opening, it is possible to maintain this opening in the open position during the execution of the work, which avoids the accumulation of water in the trench. course of realization of the barrier, this water can flow through the opening made in at least some of the panels.

Selon un premier mode de mise en oeuvre de l'invention, au moins une partie des panneaux préfabriqués sont constitués par des palplanches.According to a first embodiment of the invention, at least a portion of the prefabricated panels consist of sheet piles.

Selon un deuxième mode de mise en oeuvre, au moins une partie des panneaux préfabriqués sont constitués par des panneaux préfabriqués en béton.According to a second embodiment, at least a portion of the prefabricated panels consist of prefabricated concrete panels.

Selon un troisième mode de mise en oeuvre, au moins une partie des panneaux préfabriqués est constituée par des feuilles en matière plastique, par exemple en polyéthylène haute densité (PEHD) avec des serrures et leur joint d'étanchéité. Ces feuilles peuvent être renforcées par des profilés métalliques bétonnés dans des tubes en matière plastique intégrés aux dites feuilles.According to a third mode of implementation, at least a portion of the prefabricated panels consists of plastic sheets, for example high density polyethylene (HDPE) with locks and their seal. These sheets can be reinforced by metal profiles concreted in plastic tubes integrated with said sheets.

Un autre objet de l'invention est une barrière d'étanchéité du type obtenu par la mise en oeuvre du procédé du type défini ci-dessus.Another object of the invention is a sealing barrier of the type obtained by the implementation of the method of the type defined above.

Selon l'invention, la barrière souterraine comprend :

  • une pluralité de panneaux préfabriqués disposés côte à côte dans la tranchée et reliés entre eux par des moyens de liaison mécanique et d'étanchéité, certains desdits panneaux comprenant une ouverture munie de moyens d'obturation commandables ;
  • des premiers moyens d'étanchéité limités entre le bord inférieur des panneaux et le fond de la tranchée ; et
  • des deuxièmes moyens d'étanchéité limités entre le bord vertical libre des panneaux d'extrémité et les parois d'extrémité de la tranchée.
According to the invention, the underground barrier comprises:
  • a plurality of prefabricated panels arranged side by side in the trench and interconnected by mechanical connection and sealing means, some of said panels comprising an opening provided with controllable sealing means;
  • first limited sealing means between the lower edge of the panels and the bottom of the trench; and
  • second limited sealing means between the free vertical edge of the end panels and the end walls of the trench.

D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit de plusieurs modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. La description se réfère aux figures annexées sur lesquelles :

  • la figure 1 est une vue simplifiée de dessus de la réalisation d'une barrière conforme à l'invention ;
  • la figure 2 est une vue simplifiée d'un panneau préfabriqué mis en place dans la tranchée ;
  • les figures 3A à 3D montrent en coupe horizontale la mise en place d'un panneau préfabriqué comportant une ouverture obturable pour permettre l'écoulement de l'eau ; et
  • la figure 4 est une vue en élévation d'un panneau préfabriqué muni d'une fenêtre.
Other characteristics and advantages of the invention will appear better on reading the following description of several embodiments of the invention given as non-limiting examples. The description refers to the appended figures in which:
  • the figure 1 is a simplified view from above of the embodiment of a barrier according to the invention;
  • the figure 2 is a simplified view of a prefabricated panel installed in the trench;
  • the Figures 3A to 3D show in horizontal section the establishment of a prefabricated panel having a closable opening to allow the flow of water; and
  • the figure 4 is an elevational view of a prefabricated panel with a window.

En se référant tout d'abord aux figures 1 et 2, on va décrire un premier mode de mise en oeuvre de l'invention.Referring first to Figures 1 and 2 a first embodiment of the invention will be described.

Sur la figure 1, on a représenté une tranchée 10 dans laquelle doit être réalisée une barrière de contrôle contre l'écoulement des eaux. Cette tranchée comporte un fond 12, des parois latérales d'extrémité 14 et 16 et des parois verticales longitudinales 18 et 20. Pour que le barrage soit efficace, il faut bien sûr que la tranchée soit réalisée de telle manière que le fond soit dans une couche du sol dépourvue d'anfractuosités ainsi que les parois verticales d'extrémité 14 et 16. En revanche, les parois verticales longitudinales 18 et 20 comportent des anfractuosités autorisant une circulation abondante d'eaux souterraines.On the figure 1 there is shown a trench 10 in which a control barrier against the flow of water must be made. This trench comprises a bottom 12, end side walls 14 and 16 and longitudinal vertical walls 18 and 20. For the dam to be effective, it must of course that the trench is made in such a way that the bottom is in a layer of the soil free of crevices and the vertical end walls 14 and 16. In contrast, the longitudinal vertical walls 18 and 20 comprise crevices allowing an abundant flow of groundwater.

La tranchée 10 peut être réalisée entièrement avant la mise en place des panneaux ou, de préférence, elle est réalisée par sections de longueur un peu supérieure à la longueur des panneaux préfabriqués.The trench 10 can be made entirely before the introduction of the panels or, preferably, it is made in sections of length a little longer than the length of the prefabricated panels.

Sur la figure 2, on a représenté un panneau 22 réalisé par exemple en béton armé. Le panneau 22 comporte un bord inférieur 24, un bord supérieur 26 et deux bords latéraux verticaux 28 et 30. La hauteur H du panneau est égale à la hauteur de la barrière que l'on veut réaliser, et sa largeur est égale à L. Les bords latéraux 26 et 28 du panneau sont munis d'éléments de liaison mécanique et d'étanchéité constitués, par exemple, par des palplanches 32 et 34. Au moins certains des panneaux 22 sont munis d'une ouverture constituant une fenêtre 36 équipée de moyens d'obturation non représentés.On the figure 2 , there is shown a panel 22 made for example of reinforced concrete. The panel 22 has a lower edge 24, an upper edge 26 and two vertical lateral edges 28 and 30. The height H of the panel is equal to the height of the barrier that is to be made, and its width is equal to L. The lateral edges 26 and 28 of the panel are provided with mechanical connection and sealing elements constituted, for example, by sheet piles 32 and 34. At least some of the panels 22 are provided with an opening constituting a window 36 equipped with shutter means not shown.

Pour la réalisation de la barrière, après avoir creusé la tranchée 10, on met en place un premier panneau d'extrémité 221 et on réalise le long de la paroi verticale 14 de la tranchée un scellement 40 dans lequel est engagé l'élément 30 de solidarisation du panneau 221 qui peut consister en plusieurs palplanches. En outre, on réalise à l'aide de béton ou de coulis un scellement 42 du bord inférieur 24 du panneau sur le fond de la tranchée pour assurer ainsi l'étanchéité entre le panneau et le fond de cette tranchée. On met en place successivement les différents panneaux 222, etc., en engageant les éléments de liaison mécanique et d'étanchéité 30 et 32 constitués, par exemple, par des palplanches. Le dernier panneau 22n est équipé d'un élément 32' de solidarisation et d'étanchéité qui est noyé dans un scellement 44 réalisé contre la paroi d'extrémité 16 de la tranchée. Enfin, on procède au comblement de la tranchée par tout moyen convenable.For the production of the barrier, after having dug the trench 10, a first end panel 22 1 is put in place and a seal 40 in which the element 30 is engaged is made along the vertical wall 14 of the trench. of securing the panel 22 1 which may consist of several sheet piles. In addition, is made using concrete or grout a seal 42 of the lower edge 24 of the panel on the bottom of the trench to thereby seal between the panel and the bottom of the trench. The different panels 22 2 , etc., are successively put into place by engaging the mechanical and sealing connecting elements 30 and 32 constituted, for example, by sheet piles. The last panel 22 n is equipped with a fastening and sealing element 32 'which is embedded in a seal 44 made against the end wall 16 of the trench. Finally, the trench is filled by any suitable means.

On obtient ainsi par la présence des différents panneaux et de leurs éléments de liaison mécanique et d'étanchéité un barrage continu s'opposant à la circulation des eaux souterraines. Comme on l'a indiqué, certains panneaux comportent une ouverture 36 munie de moyens d'obturation commandables. Lors de la réalisation de la barrière souterraine, de préférence on laisse ouvertes les fenêtres 36 de telle manière que l'eau pénétrant dans la tranchée 10 puisse s'écouler à travers les ouvertures 36 et ne s'écoule pas dans cette tranchée en raison de la présence des panneaux.This results in the presence of the various panels and their mechanical connection and sealing elements a continuous dam opposing the circulation of groundwater. As indicated, some panels have an opening 36 provided with controllable sealing means. When producing the underground barrier, the windows 36 are preferably left open so that the water entering the trench 10 can flow through the openings 36 and not flow into this trench due to the presence of the panels.

Lorsque la barrière a été entièrement terminée, les fenêtres 36 équipées de leurs moyens d'obturation commandables à distance, c'est-à-dire depuis la surface du sol, peuvent être ouvertes ou fermées ou mises dans une position intermédiaire afin de permettre le passage d'un débit contrôlé d'eau souterraine de part et d'autre de la barrière constituée par les panneaux 22.When the barrier has been completely completed, the windows 36 equipped with their shutter means remotely controllable, that is to say from the surface of the ground, can be opened or closed or placed in an intermediate position to allow the passage of a controlled flow of groundwater on either side of the barrier formed by the panels 22.

Dans l'exemple décrit en liaison avec les figures 1 et 2, les panneaux préfabriqués servant à réaliser la barrière sont des éléments en béton ou en béton armé. Il va de soi que l'on pourra utiliser d'autres matériaux correspondant toujours à la définition de panneaux préfabriqués. On pourrait également utiliser au moins en partie comme panneau préfabriqué des palplanches engagées les unes avec les autres. De préférence dans ce cas, certains panneaux spécialisés par exemple réalisés en béton comporteraient les ouvertures 36 afin de permettre un écoulement contrôlé des eaux souterraines.In the example described in connection with the Figures 1 and 2 , the prefabricated panels used to make the barrier are elements made of concrete or reinforced concrete. It goes without saying that we can use other materials still corresponding to the definition of prefabricated panels. One could also use at least in part as prefabricated sheet piles engaged with each other. Preferably in this case, some specialized panels for example made of concrete would include openings 36 to allow a controlled flow of groundwater.

Les panneaux préfabriqués pourraient également être constitués par des feuilles en matière plastique, par exemple en polyéthylène haute densité (PEHD) avec des serrures et leur joint d'étanchéité. Ces feuilles peuvent être renforcées par des profilés métalliques bétonnés dans des tubes en matière plastique intégrés aux dites feuilles.The prefabricated panels could also consist of plastic sheets, for example high density polyethylene (HDPE) with locks and their seal. These sheets can be reinforced by metal profiles concreted in plastic tubes integrated with said sheets.

Dans ce cas également, certains panneaux seront des panneaux préfabriqués ou des panneaux à structure métallique en béton et équipés d'une ouverture munie de moyens d'obturation.In this case also, some panels will be prefabricated panels or panels with a concrete metal structure and equipped with an opening provided with closure means.

En se référant maintenant aux figures 3A à 3D et 4, on va décrire un exemple de mise en place d'un panneau préfabriqué équipé d'une fenêtre et monté à une extrémité de la tranchée.Referring now to Figures 3A to 3D and 4 an example of setting up a prefabricated panel equipped with a window and mounted at one end of the trench will be described.

Les figures 3A à 3D montrent les différentes étapes de la mise en place du panneau d'extrémité 22'.The Figures 3A to 3D show the different stages of the establishment of the end panel 22 '.

Sur la figure 3A, on a représenté la tranchée 10 dans laquelle est déjà mis en place l'avant-dernier panneau 22 avec son élément de solidarisation 32. On a également représenté le scellement 44 réalisé contre la paroi d'extrémité 16 de la tranchée dans lequel est fixé l'élément de solidarisation et d'étanchéité 34.On the figure 3A the trench 10 is shown in which the penultimate panel 22 is already fitted with its securing element 32. The seal 44 made against the end wall 16 of the trench in which is fixed is also shown. the fastening and sealing element 34.

Sur la figure 3B, on montre la mise en place du panneau d'extrémité 22'. Préalablement à cette mise en place, on monte sur les éléments de solidarisation 32 et 34 des extensions verticales 46 et 48 qui se terminent par une forme en T 50, 52.On the figure 3B , we show the establishment of the end panel 22 '. Prior to this installation, the mounting elements 32 and 34 are mounted on the vertical extensions 46 and 48 which terminate in a T-shaped shape 50, 52.

Le panneau 22' comprend une structure métallique en tôles qui définit deux caissons verticaux d'extrémité 54 et 56 munis d'une fente verticale 58, 60. Cette structure métallique définit également une fenêtre 62 et deux glissières verticales 64 et 66. La structure métallique comporte également deux passages tubulaires 68 et 70 qui sont raccordés à une conduite verticale 72 de commande.The panel 22 'comprises a sheet metal structure which defines two vertical end boxes 54 and 56 provided with a vertical slot 58, 60. This metal structure also defines a window 62 and two vertical rails 64 and 66. The metal structure also comprises two tubular passages 68 and 70 which are connected to a vertical control line 72.

Le panneau 22' est mis en place dans la tranchée 10 de telle manière que les extrémités en T 50 et 52 des éléments de solidarisation pénètrent dans les caissons verticaux 54 et 56 du panneau grâce aux fentes 58 et 60.The panel 22 'is placed in the trench 10 so that the T-ends 50 and 52 of the fastening elements penetrate the vertical boxes 54 and 56 of the panel through the slots 58 and 60.

Après cette opération, la figure 3C montre qu'on remplit de béton ou de coulis les caissons 54 et 56, ainsi que les volumes limitant les glissières 64 et 66. On obtient ainsi la solidarisation du panneau 22' et la réalisation de l'étanchéité entre ce panneau et le panneau 22 et entre ce panneau et la paroi d'extrémité 16 de la tranchée.After this operation, the figure 3C shows that the caissons 54 and 56 are filled with concrete or grout, as well as the volumes limiting the slides 64 and 66. This secures the panel 22 'and makes the seal between this panel and the panel 22. and between this panel and the end wall 16 of the trench.

Dans l'étape représentée sur la figure 3D, on met en place dans les glissières 64 et 66 une trappe mobile 74 de fermeture de la fenêtre 62.In the step shown on the 3D figure a sliding hatch 74 for closing the window 62 is placed in the slides 64 and 66.

La figure 4 montre le panneau 22' mis en place dans la tranchée 10. On y voit le scellement 31 pour réaliser l'étanchéité entre le fond 12 de la tranchée et le bord inférieur 24' du panneau 22'. Cette figure montre également la trappe mobile 74 équipée d'un système de commande de déplacement 76.The figure 4 shows the panel 22 'placed in the trench 10. It shows the seal 31 to seal between the bottom 12 of the trench and the lower edge 24' of the panel 22 '. This figure also shows the mobile hatch 74 equipped with a displacement control system 76.

Sur la figure 4, on voit également les passages tubulaires 68 et 70 qui traversent le panneau 22' sur toute son épaisseur. Ces passages 68 et 70 autorisent un débit d'eau à travers le panneau. Ces passages tubulaires peuvent être obturés par une tige d'obturation 78 montée mobile dans le tube vertical 72. L'obturation peut être assurée par un ou des obturateurs gonflables, des vannes, ou tout autre moyen adapté, à commande mécanique, hydraulique ou autre.On the figure 4 , we also see the tubular passages 68 and 70 which pass through the panel 22 'over its entire thickness. These passages 68 and 70 allow a flow of water through the panel. These tubular passages may be closed by a closure rod 78 mounted movably in the vertical tube 72. The closure may be provided by one or more inflatable shutters, valves, or any other suitable means, mechanically, hydraulically or otherwise .

Claims (10)

  1. A method of making an underground barrier for controlling the flow of water in the ground, the method being characterized in that it comprises the following steps:
    · making a trench in the ground at the position in which the barrier should be made in such a manner as to cause the bottom of the trench to be in a layer of ground that is sufficiently impermeable;
    · providing prefabricated panels each presenting a lower edge and two vertical side edges fitted with mutual sealing means, some of said panels including respective openings provided with controllable shutter means;
    · placing said panels in the trench in such a manner as to cause adjacent panels to be united and sealed together in pairs;
    · establishing first limited sealing between the bottom edge of each panel and the bottom of the trench; and
    · establishing second limited sealing between the free vertical edge of each end panel and the end wall of the trench.
  2. A method according to claim 1, characterized in that the uniting and sealing between said prefabricated panels are ensured at least in part by sheet piling.
  3. A method according to claim 1 or claim 2, characterized in that said panels are constituted at least in part by prefabricated panels made of concrete or of metal, or even of high-density polyethylene (HDPE).
  4. A method according to claim 3, characterized in that at least some of said concrete panels include a window forming said opening and a shutter plate mounted to slide in said window.
  5. A method according to claim 3 or claim 4, characterized in that some of said concrete panels include at least one pipe passing through the panel.
  6. A method according to claim 5, characterized in that said pipe is provided with controllable shutter means.
  7. An underground barrier for controlling the flow of underground water and made in a trench, with a plurality of prefabricated panels placed side by side in the trench and connected to one another by mechanical connection means and sealing means, the barrier being characterized in that it includes:
    · first limited sealing means between the bottom edge of the panels and the bottom of the trench; and
    · second limited sealing means between the free vertical edge of the end panels and the end walls of the trench; and
    in that some of said panels include respective openings provided with controllable shutter means.
  8. A barrier according to claim 7, characterized in that at least some of said prefabricated panels are made of concrete.
  9. A barrier according to claim 7 or claim 8, characterized in that some of said prefabricated panels are sheet piling.
  10. A barrier according to any one of claims 7 to 9, characterized in that some of said prefabricated panels are sheets of high-density polyethylene reinforced by section members.
EP04292960A 2003-12-18 2004-12-13 Method of controlling the flow of water in an aquifer Not-in-force EP1553228B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0314875 2003-12-18
FR0314875A FR2864122B1 (en) 2003-12-18 2003-12-18 METHOD FOR PRODUCING BARRIERS FOR CONTROLLING UNDERGROUND WATER CIRCULATION AND BARRIER OBTAINED BY THIS METHOD

Publications (2)

Publication Number Publication Date
EP1553228A1 EP1553228A1 (en) 2005-07-13
EP1553228B1 true EP1553228B1 (en) 2011-07-20

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Application Number Title Priority Date Filing Date
EP04292960A Not-in-force EP1553228B1 (en) 2003-12-18 2004-12-13 Method of controlling the flow of water in an aquifer

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EP (1) EP1553228B1 (en)
AT (1) ATE517212T1 (en)
ES (1) ES2369772T3 (en)
FR (1) FR2864122B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114108607B (en) * 2021-11-10 2023-07-18 中国一冶集团有限公司 Bored concrete pile construction method for penetrating karst cave

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300984A (en) * 1966-07-05 1967-01-31 Arthur L Armentrout Subterranean dam and method of making the same
DE3716292A1 (en) * 1987-05-15 1988-11-24 Thosti Boswau Wtb Bau Ag Method and arrangement for constructing a diaphragm wall
DE4205455C1 (en) * 1992-02-22 1993-09-02 Preussag Stahl Ag, 3150 Peine, De Sealing wall of elements driven into ground for dumps - has performed elements welded fabrications, with connector at one side which slides over edge of neighbouring elements forming chamber
HU222363B1 (en) * 1999-02-10 2003-06-28 Sándor Barkász Process for building of continuous, impermeable slot-wall, which enlarge permeability road
ATE281566T1 (en) * 2002-03-06 2004-11-15 Bvv Spezialtiefbautechnik Vert METHOD FOR SUPPORTING AND SEALING SOIL

Also Published As

Publication number Publication date
EP1553228A1 (en) 2005-07-13
FR2864122A1 (en) 2005-06-24
ES2369772T3 (en) 2011-12-05
FR2864122B1 (en) 2006-03-17
ATE517212T1 (en) 2011-08-15

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