WO1997009486A1 - Dispositif de mur drainant implante dans un sol - Google Patents
Dispositif de mur drainant implante dans un sol Download PDFInfo
- Publication number
- WO1997009486A1 WO1997009486A1 PCT/FR1996/001355 FR9601355W WO9709486A1 WO 1997009486 A1 WO1997009486 A1 WO 1997009486A1 FR 9601355 W FR9601355 W FR 9601355W WO 9709486 A1 WO9709486 A1 WO 9709486A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wells
- draining
- drainage
- gallery
- downstream
- Prior art date
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B11/00—Drainage of soil, e.g. for agricultural purposes
-
- 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
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
Definitions
- the invention relates to the protection of a terrestrial or underground zone or installation against the flow of water in the soil surrounding the site.
- This type of draining wall can both protect the area or installation in question against entrainment from internal pollution as a result of damage to this area or installation by water flows, but also protect an area or installation and its surroundings of external pollution caused by flows through the polluted site.
- Such a draining wall also makes it possible to envisage cleaning up polluted soil by hydraulic pumping.
- An application is planned for the geological storage of toxic waste, in particular nuclear waste.
- Figure 1 shows in section a region with its subsoil in which a fault phenomenon has occurred.
- This phenomenon is symbolized by two cracks, an upstream crack 1 and a downstream crack 2.
- the arrow 3 placed in the basement shows the direction of the water flow at this location.
- the vertical lines 4 parallel to each other symbolize storage wells joined at their apex by a horizontal handling gallery 5.
- the vertical wells ⁇ placed at the end of this storage facility are draining wells. Arrows placed around " these draining wells ⁇ show that the surrounding flows are attracted by these draining wells 6 and are channeled by the horizontal handling gallery. Thus, the flows tend to avoid the storage wells 4. This has the purpose of Consequently, the water passing through this storage area comes out with a partially reduced level of radioactivity.
- the flows of the massif are diverted from their initial orientation, generally horizontal, to reach a vertical orientation in the vicinity of the storage wells.
- the repository consisting of several rows of storage wells 6 and handling galleries placed parallel to one another (FIG. 2A) has defects in permeability, that is to say if the excavations are filled with a material having a greater permeability than that of the solid mass.
- These wells then help to drain the water from upstream of the storage also over a significant height of the massif. All this drained water is then channeled to contact with the waste located in the storage wells. Its potential contamination is then increased by the existence of all these draining excavations.
- the object of the invention is to remedy these drawbacks and, in general, to isolate an underground volume from the flows taking place in the subsoil at this location, to avoid altering this volume by the flow waters. or to prevent this runoff from extracting polluting materials when passing through it.
- the first main object of the invention is a draining wall device implanted in a ground to protect an area or a ground or underground installation against hydraulic flows in the basement, this wall comprising mainly:
- a plurality of draining wells forming a wall placed upstream of said zone to be protected, each defining a radius of determined hydraulic influence, vertical, spaced from each other by a distance much greater than said radius of hydraulic influence,
- the means for evacuating the hydraulically drained flows can be constituted by a pumping device connected to the upstream / downstream gallery.
- the means for evacuating the hydraulically drained flows consist of the natural outlet downstream from the underground zone.
- the means for evacuating the hydraulically drained flows can also consist of a plurality of draining wells located downstream, connected to each other by at least a second gallery of wells spaced from each other by a much greater distance. to the hydraulic influence radius of an isolated well to convey the drained flows downstream of the zone or installation.
- the draining wells also have a determined height greater than the height of the zone or volume.
- a second main object of the invention is a method of protecting a ground or underground zone or installation against hydraulic flows in the basement in a determined direction, this method consisting in placing a draining wall device such that it has just been summarized, substantially perpendicular to the determined direction of flow, upstream of the zone or of the installation.
- the installation or the zone is a nuclear waste storage installation comprising access galleries, each of these access galleries having a determined number of storage wells, these access galleries are draining galleries upstream / downstream which extend to the plurality of wells located upstream and downstream of the installation at the height of the second gallery of drainage wells, the number of drainage wells being two to five times more important than the number of draining axial galleries.
- FIG. 3 a diagram from above of an installation of Figure 1 equipped with a wall device according to the invention
- FIG. 4 a schematic view of a nuclear waste storage facility to which the wall device according to the invention is applied; - Figure 5, a cutaway view of an underground installation equipped with a wall device according to the invention in a first particular embodiment; - Figure ⁇ , a diagram relating to the use of the invention for the protection of a tunnel; and FIG. 7, a diagram in cutaway view of an underground installation equipped with a wall device according to the invention in a second embodiment.
- the invention proposes to add draining wells 6A in addition to the draining wells 6 of FIG. 2A, between these wells ⁇ initially planned.
- draining wells 6A additional to the draining wells ⁇ placed at the head of the access galleries which become axial drainage galleries and so-called balancing galleries upstream / downstream 7 and act as means for hydraulically discharging the wall.
- Figure 1 proposed a relatively deep ⁇ draining well.
- the lower arrows show that the general drainage in the area delimited by cracks 1 and 2 flows in the direction of arrow 3.
- the flow tends to be attracted by the latter and the direction of flow can be reversed upstream of the draining well ⁇ .
- This inversion constitutes a particularly interesting phenomenon to be exploited to limit the entrainment of water to the base of the storage wells 4 if it is possible to carry it out over the entire space of the massif located under the storage area. This effect is preserved in the device of the draining wall according to the invention if the draining wells 6 are more deeper than the area to be protected.
- a drainage and balancing gallery called a gallery of drainage wells 8, perpendicular to the axial drainage galleries 17 and parallel to a central access gallery 9 is provided at the level of the drainage wells 6 and 6A.
- This gallery of drainage wells 8 promotes the efficiency of the draining wells ⁇ and 6A and therefore increases their distance of influence to maintain the desired efficiency, despite the relatively large spacing between each draining well.
- This gallery of drainage wells 8 makes it possible to evacuate the flows drained by the wells ⁇ , 6A.
- Figure 4 is shown in detail an underground nuclear waste storage facility. There is a general gallery 9 giving access to upstream / downstream galleries 7.
- Each of these upstream / downstream galleries 7 provides access to a series of storage wells 4 in each of which are slipped several packages of nuclear waste poured into a mass of glass. The whole can be covered with clay inside the storage wells 4.
- a ventilation is organized in the central access gallery 9 and the upstream / downstream draining galleries 7 with an air return gallery 18.
- the draining property of the upstream / downstream galleries can be eliminated if tightening (or plugs) are placed there at the closure of the repository.
- the hydraulic connection between the upstream draining wall and the downstream can then be carried out by means of the air return gallery 18 if the latter is backfilled with a draining material when the storage is closed.
- a draining wall is placed upstream of the structure. It can also be effective to place a draining wall downstream referenced by its draining tubes 6B. It is noted that the depth of the draining wells ⁇ , 6A and 6B also makes it possible to capture a vertical geohydraulic circulation gradient.
- the system only works if there is at least one upstream / downstream gallery 7 in the axis of the flow which connects this draining wall to the hydraulic downstream of this area to be protected.
- a downstream wall can also be built: it will limit the depth of the upstream wall and the length of the axial drainage gallery dug downstream of this area.
- the general principle of the invention is therefore to draw up a draining wall comprising vertical draining wells 6, spaced from one another and connected at one of their ends by a gallery of drainage wells 8.
- the height of the draining wells is greater than the height of the volume or of the zone 11 underground or not to be protected from hydraulic flows, whatever the porosity of the massif or of the subsoil in question.
- the width of the draining wall can also be greater than the width of this volume 11.
- the wall of draining wells ⁇ is completed by a drainage and balancing gallery called the upstream / downstream gallery 7, oriented axially in the direction of the overall underground flow. It is connected upstream to the gallery of drainage wells 8 and downstream to a second wall of draining wells ⁇ by another gallery of drainage wells 8.
- Draining walls can also be made on the other two faces of the area to be protected to cope with any changes in the general direction of flow.
- Another way to allow the entrainment of water from upstream of the site and collected by the draining wall upstream downstream is to use other galleries further away from nuclear waste, such as return galleries air which are envisaged above the drainage or axial galleries mentioned above, provided that they are backfilled with a permeable material.
- An urban site can also be protected from entrainment from accidental pollution of a soil under an industrial or artisanal installation with this process.
- FIG. 6 shows an example of a particular use of the wall device, according to the invention, for the protection of a tunnel 20 against a general flow of water inside a massif, symbolized by the horizontal arrow 21.
- the wall is always made up of draining wells 6, with the difference that these wells can open onto the surface 24 of the soil of the solid mass traversed by the tunnel 20.
- the gallery of drainage wells 22 which connects the draining wells ⁇ is placed in this case at their lower ends.
- An upstream / downstream gallery 23 can also be provided at the same level as the gallery of drainage wells 22. In this case, the upstream / downstream gallery 23 passes below the tunnel 20 to open downstream thereof to the natural outlet in relation to the general flow of water, symbolized by the arrow 21.
- Figure 7 shows another embodiment of the means for hydraulically discharging the wall. It is a pumping station 18 which fulfills this function, via a pipe 19 connected to the upstream / downstream drainage and balancing gallery 7. It is also conceivable to clean polluted soil by making such a draining wall and placing it in a suitable position. A draining wall arranged downstream and at a certain distance from the polluted site will allow a much shorter time of action than in the case of a network of wells in the polluted area, on the one hand. This solution also avoids determining the precise location of this area, on the other hand. Finally, it does not require as significant sizing of the pumping equipment as in the case of a network of wells in the polluted area.
- This process can also be applied to storage of nuclear waste without vertical sinks.
- the waste packages are then placed in the horizontal access galleries with the following precaution: the axial draining gallery (or) must (is) hydraulically isolated from these access galleries: clamps (or plugs ) not very permeable must be made at the entrance and exit of these access galleries.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Agronomy & Crop Science (AREA)
- Mechanical Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Sewage (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69607824T DE69607824T2 (de) | 1995-09-05 | 1996-09-04 | Vorrichtung einer entwässerungsmauer im boden |
CA002204407A CA2204407C (fr) | 1995-09-05 | 1996-09-04 | Dispositif de mur drainant implante dans un sol |
EP96930210A EP0795061B1 (fr) | 1995-09-05 | 1996-09-04 | Dispositif de mur drainant implante dans un sol |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR95/10386 | 1995-09-05 | ||
FR9510386A FR2738268B1 (fr) | 1995-09-05 | 1995-09-05 | Mur drainant implante dans un sol |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997009486A1 true WO1997009486A1 (fr) | 1997-03-13 |
Family
ID=9482275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/001355 WO1997009486A1 (fr) | 1995-09-05 | 1996-09-04 | Dispositif de mur drainant implante dans un sol |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0795061B1 (fr) |
DE (1) | DE69607824T2 (fr) |
ES (1) | ES2147393T3 (fr) |
FR (1) | FR2738268B1 (fr) |
RU (1) | RU2169815C2 (fr) |
WO (1) | WO1997009486A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2208013A1 (es) * | 2001-07-04 | 2004-06-01 | Paulino Alegre Fidalgo | Muro de salvaguarda y control de reservas de agua subterranea. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2354418A1 (fr) * | 1976-06-09 | 1978-01-06 | Morfeldt Carl Olof | Procede pour empecher la contamination des eaux souterraines par des produits ou des installations se trouvant sur le sol ou dans des cavites en dessous du niveau du sol |
US4288174A (en) * | 1979-09-10 | 1981-09-08 | Laws Awbrey C | System for groundwater flow control |
US5316410A (en) * | 1992-06-09 | 1994-05-31 | Blume Robert F | Foundation drainage system |
-
1995
- 1995-09-05 FR FR9510386A patent/FR2738268B1/fr not_active Expired - Lifetime
-
1996
- 1996-09-04 DE DE69607824T patent/DE69607824T2/de not_active Expired - Lifetime
- 1996-09-04 ES ES96930210T patent/ES2147393T3/es not_active Expired - Lifetime
- 1996-09-04 RU RU97109346/03A patent/RU2169815C2/ru not_active IP Right Cessation
- 1996-09-04 EP EP96930210A patent/EP0795061B1/fr not_active Expired - Lifetime
- 1996-09-04 WO PCT/FR1996/001355 patent/WO1997009486A1/fr active IP Right Grant
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2354418A1 (fr) * | 1976-06-09 | 1978-01-06 | Morfeldt Carl Olof | Procede pour empecher la contamination des eaux souterraines par des produits ou des installations se trouvant sur le sol ou dans des cavites en dessous du niveau du sol |
US4288174A (en) * | 1979-09-10 | 1981-09-08 | Laws Awbrey C | System for groundwater flow control |
US5316410A (en) * | 1992-06-09 | 1994-05-31 | Blume Robert F | Foundation drainage system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2208013A1 (es) * | 2001-07-04 | 2004-06-01 | Paulino Alegre Fidalgo | Muro de salvaguarda y control de reservas de agua subterranea. |
Also Published As
Publication number | Publication date |
---|---|
FR2738268B1 (fr) | 1997-10-24 |
FR2738268A1 (fr) | 1997-03-07 |
EP0795061A1 (fr) | 1997-09-17 |
EP0795061B1 (fr) | 2000-04-19 |
RU2169815C2 (ru) | 2001-06-27 |
DE69607824T2 (de) | 2000-11-09 |
DE69607824D1 (de) | 2000-05-25 |
ES2147393T3 (es) | 2000-09-01 |
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