WO1993022076A1 - Überwachungseinrichtung für eine mülldeponie und verfahren zur leckageortung - Google Patents
Überwachungseinrichtung für eine mülldeponie und verfahren zur leckageortung Download PDFInfo
- Publication number
- WO1993022076A1 WO1993022076A1 PCT/DE1993/000345 DE9300345W WO9322076A1 WO 1993022076 A1 WO1993022076 A1 WO 1993022076A1 DE 9300345 W DE9300345 W DE 9300345W WO 9322076 A1 WO9322076 A1 WO 9322076A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor
- sealing film
- hose
- monitoring device
- detection signal
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B1/00—Dumping solid waste
-
- 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
-
- 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
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/004—Sealing liners
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
Definitions
- the invention relates to a monitoring device for a landfill, in which a sealing film is used. It also relates to a particularly favorable embodiment of the sealing film and to a method for localizing a leak in a sealing film for a landfill.
- the invention is not only used in general for the sealing and monitoring of waste disposal sites, but also in particular for the location of leaks in industrial Sondermü11 storage facilities.
- Garbage can be arranged (basic sealing) so that no pollutants can get into the groundwater.
- the seal can also be installed above the refuse body (surface seal) in order to prevent the ingress of rainwater and thus the washing out of pollutants from the refuse.
- the laying of sensor hoses that is to say so-called LEOS hoses, is provided, and only on the side of the waste facing away from the waste body ⁇ seal.
- LEOS stands for "leak detection system”.
- the LEOS hoses which are laid in a meandering shape, filled with air and the walls of which are permeable to various substances present in the deposit, are connected to a central monitoring system. If the seal is placed below the waste body, a
- Damaged area is localized by detection of substances dissolved in the leachate. And when a seal is placed above the refuse body, a damaged area is located in it by detecting rising digest gases.
- a LEOS hose and a device that serves for its operation are known from DE-PS 24 31 907. It is a hose that is permeable to pollutants. At one end of the hose is one
- a pump is arranged with which individual volumes of a transport medium, for example individual gas volumes, are successively conveyed through the hose at time intervals.
- the hose is flowed through for a certain time at regular time intervals, that is to say at a constant frequency.
- sensors or detectors for the substances to be detected, in particular pollutants. If a pollutant gets into the vicinity of the hose, this pollutant penetrates the hose; it is brought to the sensors with the next pumping of the transport medium. Since the medium flows at a known speed, the difference between the switch-on time of the pump and the response time of the sensors can be used to determine exactly the location at which the pollutant entered the hose between two flow-through processes.
- German utility model G 91 07 693.5 (GR 91 G 8513 DE) describes an element for sealing and monitoring a body, in particular a landfill, by means of a control room.
- This element 5 is based on the knowledge that it makes sense to provide increased protection by means of a double barrier. This is useful both for the basic sealing and for the surface sealing of a landfill.
- the element is further based on the consideration that it also makes sense
- the element comprises two seals or sealing foils, which are arranged at a distance from one another by supporting elements.
- At least one channel is formed between the seals and the support elements, which has an inlet opening and an outlet opening for a transport medium, such as air.
- This channel is designed as a permeable LEOS tube or it contains
- Austresöffnu ⁇ g to the at least one sensor for example a sensor for stechniksdampf 'Flüs ⁇ and a sensor for gas, can be connected.
- The. Both seals are sealed at their edges, leaving the inlet and outlet openings of the channel free
- the support elements consist of a flow-permeable, but flow-restricting (largely homogeneous) material.
- the hose can be surrounded by a filling material that retains moisture, that is, by
- Monitoring device a control room in which (for the pollutant to be detected permeable) monitoring channels or sensor hoses are introduced, the contents of which are flushed towards the connected detector at regular time intervals.
- the control room consists of walls closed on all sides, which are preferably formed by polyethylene sheets or foils. It is vacuum tight.
- the object of the invention is to provide a monitoring device based on the use of a sensor hose for a landfill, in which a sealing film is used, which manages with less effort than in the prior art. Furthermore, a relatively simple method for locating leakages in the sealing film is to be specified.
- the invention is based on the consideration that one can do this task without a closed control room and with only a single, ie single-layer sealing film.
- the monitoring device provided here to achieve the stated object is equipped according to the invention
- the flushing transport medium can flow through the first and the second sensor hose in principle in the same direction or in the opposite direction.
- Either a common operator and detection system can be provided for the two sensor hoses; or separate operator and detection systems can be provided.
- the monitoring device is then particularly characterized in that a connection is provided between the output of the first sensor tube and the input of the second sensor tube, and in that the emission signal of the first sensor tube and the emission signal of the second are emitted Sensor hose a common detector is provided, which is connected to the output of the second sensor hose.
- the monitoring device is then particularly characterized in that a separate pump and a separate detector are provided for the first sensor hose and that a separate pump and a separate detector are also provided for the second sensor hose.
- the two sensor hoses are each preferably arranged in one plane or else meandering in space.
- a landfill is characterized according to the invention in that means are provided which hold the section of the first sensor hose parallel to the section of the second sensor hose.
- the stated object is achieved according to the invention in that, at regular time intervals, a transport medium is passed through a first sensor tube, which is laid on one side of the sealing film, and is passed through a second sensor tube, which is laid parallel to it on the other side of the sealing film, in such a way that the substances removed from the first and second sensor tubes are measured by detection signals that the detection signal of the first sensor tube is included the detection signal of the second sensor tube is linked in a location-appropriate manner, and that the linked signal is displayed.
- the two detection signals are preferably subtracted from one another in a location-appropriate manner.
- the basic principle of the present invention can be recognized quite simply from the following example: on both sides of the sealing film is largely parallel to one another arranged and pollutant-permeable sensor hoses, the LECS technology, ie the "sniffing technique" known per se, is used.
- the difference in the concentration on both sides of the sealing film is determined and represented as a function of the “hose supervisory position”, that is to say as a function of the flow path.
- a leak clearly marks itself as an extreme value, specifically regardless of the concentration concentrations present above the (for example horizontally arranged) sealing film as a result of contaminated sites that have settled in the concrete, for example.
- the advantages of the invention can be summarized as follows:
- the device described and the method do not require a vacuum-tight control room.
- the described method is independent of locally fluctuating hazardous waste concentrations above the sealing film in industrial areas; the reverse is true for landfill surface seals. Only a single-layer sealing film is required, which means considerable savings compared to the known double sealing film.
- the method measures the "barrier function of the sealing film" directly when forming the concentration difference; This means that the concentration difference is a measure of the quality of the sealing film (possibly heavily used there) at each measuring location.
- FIG. 1 shows in section a polyethylene sealing film, on each of which a sensor tube of known configuration is arranged on both sides, the sealing film being accommodated in a concrete structure;
- FIG. 2 shows an average of such a sealing film, which is arranged in the entire tub area of a landfill
- FIG. 3 shows a view from above of a sealing film with two sensor tubes through which the transport medium flows in the opposite direction;
- FIG. 4 shows a view from above of a sealing film with two sensor hoses through which flow flows in the same direction
- FIG. 5 shows the local course of the concentration, which is determined by the detector and a computer in a monitoring device according to FIG. 4;
- FIG. 6 the positive difference signal determined therefrom
- FIG. 7 alternatively the negative difference signal determined therefrom
- FIG. 8 shows a view of an essentially vertically arranged sealing film with sensor tubes
- FIG. 9 shows a spatially meandering configuration of the sensor tubes
- Figure 10 shows a landfill with bottom and side lining through a continuous sealing film
- FIG. 11 shows a landfill with bottom, side and edge lining using a continuous sealing film
- FIG. 12 shows a parallel holding device for the hose sections.
- FIG. 1 shows the mechanical part of a monitoring device which is provided for a landfill, in particular for an industrial hazardous waste plant.
- the centerpiece is a plastic sealing film 2, which preferably consists of polyethylene and is laid in a horizontal plane.
- a first permeable sensor tube 4 is laid in a meandering manner on the upper side of the sealing film 2.
- the individual sections of this first sensor tube 4 are designated 4a. They are housed in horizontally arranged protection collecting channels 6a running parallel to one another. These channels 6a are formed by a protective concrete layer 8, on top of which a layer 10 of vacuum concrete, which can be smoothed with corundum scattering, is applied.
- the sealing film 2 On the lower side of the sealing film 2 there is a second permeable sensor tube 12, which is also laid in a meandering shape and the parts of which are designated by 12a.
- the sections 12a of the second sensor hose 12 each run parallel to a section 4a of the first sensor hose 4.
- the second sensor hose 12 is also permeable to pollutants to be monitored. In particular, it also consists of polyethylene. Both sensor tubes 4, 12 are therefore the LEOS tubes already mentioned. Their distance from the sealing film 2 is only slight and is, for example, between 0.5 and 2 hose diameters.
- the second sensor hose 12 In contrast to the first sensor hose 4, the second sensor hose 12 is not housed in protective collecting channels 6a but in a fine gravel layer 14. This fine gravel layer 14 is supported on a foundation 16 made of concrete. The foundation 16 can in turn be closed at the bottom by a lean concrete layer 18.
- first and second hose 4 or 12 can be laid in the same way either in concrete protection channels or in fine gravel.
- Figure 2 shows the left edge of a trough with vertical walls, which is formed in the soil 20.
- the bottom and the edge area are each covered with a lean concrete layer 18 and 22, respectively.
- a concrete foundation 16 On top of this is a concrete foundation 16, which has a vertically projecting wall 24 between the bottom and edge areas.
- a protective layer 14A is applied to the foundation 16, which contains parallel portions 12a of a second sensor tube 12 in its entire area or in a partial area.
- Protective layer 14A is in turn a sealing film 2 made of plastic. It is noteworthy that the single-layer sealing film 2 extends continuously from the floor to the wall and into the edge area. Reinforcement pieces 26 can be provided at the corners. On this sealing film 2 there is in turn a further protective layer 28 in which the parallel sections 4a of the first sensor hose 4 are accommodated. It is again characteristic here that the sections 4a run parallel and closely adjacent to the sections 12a.
- a concrete layer 8 is in turn arranged on the protective layer 28, analogously to FIG. 1.
- a complete monitoring device for a landfill is shown in principle in FIG.
- a first sensor tube 4 is in turn meandered on the upper side of the sealing film 2.
- a second sensor tube 12 is likewise laid in a meandering shape directly on the underside of the sealing film 2.
- the second sensor tube 12 is shown in dashed lines at a short distance from the first sensor tube 4. It is noteworthy that the end of the first sensor tube 4 merges into the beginning of the second sensor tube 12 via a short, essentially vertically extending connecting piece 30. In this way, a transport medium m can flow through the two sensor tubes 4, 12 in succession and in the opposite direction, which is illustrated by small arrows 31.
- a pump 32 is provided at the input of the first sensor hose 4. Instead, it could also be arranged at the end of the second sensor hose 12 as a suction pump.
- a sensor or detector 34 which responds to one or more of the pollutants entering the sensor tubes 4, 12.
- the detector emits a first detection signal cl, which is a measure of the concentration c as a function of the time t of a pollutant flushed out of the first sensor tube 4 by means of the transport medium. It also emits a second detection signal c2, which is a measure of the concentration c as a function of the time t of the pollutant flushed out of the second sensor hose 12 by means of the transport medium m.
- first the second detection signal c2 (t) and then the first detection signal cl (t) are emitted.
- These two detection signals cl (t) and c2 (t) are fed to a computer 36, where the one signal is initially stored. With the aid of the flow velocity of the transport medium m (measured in a known manner), the local course of the concentration c along the flow path s is calculated in the computer 36, that is to say the detection signals cl (s) and c2 (s). These two detection signals are linked to one another in the computer 36 according to their location, preferably subtracted from one another, and are displayed, as will become clear later. An evaluation can also take place here.
- sealing film 2 Because in the present case only a single sealing film 2 is required to seal the landfill, it is relatively single. fold, with two sensor tubes 4, 15 12 arranged in parallel to localize a leak 40 in the sealing film 2.
- the monitoring device according to FIG. 4 otherwise has the same structure as that of FIG. 3.
- the sealing film 2 can also be vertical or instead of horizontal
- connection 30 is generally not a sensor hose, but a non-permeable hose. leads. It can also be arranged largely outside the sealing film 30.
- the concentration c determined by the computer 36 with the aid of the flow velocity is shown as a function of the flow path s, which is measured in meters.
- a transition course 46 then follows, which is caused by the flushing of the connection 30.
- the concentration curve can be recognized as the second detection signal c2 ", which occurs through the return line or the second sensor hose 12.
- This curve again contains the locations (xl, yl) and (x2, y2), that is to say at the Locations of higher concentration, again a slight maximum in each case.
- a pronounced extreme value 48 is clearly recognizable, which characterizes the leak point 40.
- This maximum 48 is located at the point that is to be determined by the monitoring device c2 (s) is followed by a final maximum 52 after a further transition section 50. This is due to equipment. It is therefore clear from FIG. 5 that a double concentration value c is assigned to each point s of the sealing film 2 along the double line 4, 12.
- concentration values cl and c2 are subtracted point by point along the flow path s, one obtains - depending on the choice of sign - either the local course of the differential signal c shown in FIG. 6 or the one shown in FIG. In each of the two curve profiles, the identified leak point 48 'or 48 1 ' can be clearly recognized at the point s_o.
- FIGS. 3 and 4 it was initially assumed that the horizontal floor area of a landfill, characterized by coordinates x, y, was provided with a sealing film 2 and monitored for leaks 30.
- Figure 8 it is now shown that this can also be carried out on an inclined or vertical wall.
- two sensor tubes 2, 12 are laid parallel to one another and meandering on both sides of the sealing film 2.
- the sealing film 2 spans a coordinate network x, z.
- the sections 4a, 12a that is to say the long line sections of the meander, of the sensor tubes 4 and 12 run vertically or obliquely in the room.
- a box-shaped landfill which comprises a floor area and four perpendicular walls arranged at right angles.
- the two sensor hoses 4, 12 are laid spatially meandering on both sides of the respective wall sealing film 2.
- the countercurrent principle is used again.
- the direct flow direction can also be selected instead.
- a trough-shaped landfill is shown again in principle in FIG.
- the garbage body in the center is not shown. It is shown here that the first sensor tube 4 and the second sensor tube 12 can be laid on a combination of horizontally and vertically arranged walls. Any meandering installation can also be selected here.
- this principle has been extended to the edge region of the trough-shaped landfill.
- the upper edge area is therefore included in the laying here. And here, too, any meandering installation can be chosen.
- the two sensor hoses 4, 12 do not necessarily have to be connected in series in the same or opposite direction when the flow is applied, as was previously shown in the figures. Instead, it is also possible to use a separate pump and a separate detector for the first sensor tube 2, which emits the first detection signal cl. A separate pump and a separate detector, which emits the second sensor signal c2, is likewise provided for the second sensor hose 12. The correct connection of the two detection signals cl, c2 then takes place in the manner described.
- section 4a of the first sensor tube 4 attached to one side of the film is held parallel to section 12a of the sensor tube 12 attached to the other side of the film.
- Special means are required for this.
- Such means 60 and 62 are shown by way of example in FIG.
- These means 60, 62 for keeping the partial Pieces 4a, 12a can be integrated in the sealing film 2, for example in the form of knobs. Instead, they can also be attached to it, for example welded to it or preferably glued to it. In particular, they can be designed in the form of a clamping device.
- plastic guide pieces 64, 66 rounded on one side and adapted to the hoses 4, 12 are glued to the sealing film 2 ' on both sides thereof.
- the tube pieces 4a, 12 ⁇ are aligned parallel to one another in the depressions.
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU39475/93A AU669703B2 (en) | 1992-04-24 | 1993-04-21 | Monitoring device for a rubbish dump and process for locating leaks |
| JP5518821A JPH07505827A (ja) | 1992-04-24 | 1993-04-21 | ゴミ処分場の監視装置及びその漏洩位置検出方法 |
| EP93908801A EP0637271B1 (de) | 1992-04-24 | 1993-04-21 | Überwachungseinrichtung für eine mülldeponie und verfahren zur leckageortung |
| SK1289-94A SK128994A3 (en) | 1992-04-24 | 1993-04-21 | Monitoring device for a rubbish dump and process for locating leaks |
| DE59306938T DE59306938D1 (de) | 1992-04-24 | 1993-04-21 | Überwachungseinrichtung für eine mülldeponie und verfahren zur leckageortung |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4213585.0 | 1992-04-24 | ||
| DE4213585A DE4213585A1 (de) | 1992-04-24 | 1992-04-24 | Überwachungseinrichtung für eine Mülldeponie und Verfahren zur Leckageortung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993022076A1 true WO1993022076A1 (de) | 1993-11-11 |
Family
ID=6457438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1993/000345 Ceased WO1993022076A1 (de) | 1992-04-24 | 1993-04-21 | Überwachungseinrichtung für eine mülldeponie und verfahren zur leckageortung |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US5570974A (de) |
| EP (1) | EP0637271B1 (de) |
| JP (1) | JPH07505827A (de) |
| AT (1) | ATE155367T1 (de) |
| AU (1) | AU669703B2 (de) |
| CA (1) | CA2134100A1 (de) |
| CZ (1) | CZ256794A3 (de) |
| DE (2) | DE4213585A1 (de) |
| DK (1) | DK0637271T3 (de) |
| ES (1) | ES2105244T3 (de) |
| RU (1) | RU94045958A (de) |
| SK (1) | SK128994A3 (de) |
| WO (1) | WO1993022076A1 (de) |
Families Citing this family (18)
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|---|---|---|---|---|
| DE4326361C1 (de) * | 1993-08-05 | 1994-10-20 | Hubert Reidick | Verfahren und Vorrichtung zur Bestimmung der Durchlässigkeit von Bodenformationen, insbesondere von Deponiebasisabdichtungen und/oder von Deponieabdeckungen |
| JP2869431B2 (ja) * | 1995-11-17 | 1999-03-10 | 株式会社環境アセスメントセンター | 地下ダム |
| AU709750B2 (en) * | 1996-04-06 | 1999-09-09 | Hanson Quarry Products Europe Limited | Lining for a landfill site |
| US6016714A (en) * | 1997-09-08 | 2000-01-25 | Lockheed Martin Idaho Technologies Company | Sensor system for buried waste containment sites |
| AU3263501A (en) * | 1999-12-06 | 2001-06-12 | Bechtel Bwxt Idaho, Llc | Advanced containment system |
| US7153061B2 (en) * | 2000-12-04 | 2006-12-26 | Battelle Energy Alliance, Llc | Method of in situ retrieval of contaminants or other substances using a barrier system and leaching solutions |
| US7056063B2 (en) * | 2000-12-04 | 2006-06-06 | Battelle Energy Alliance, Llc | Apparatus for indication of at least one subsurface barrier characteristic |
| US7160061B2 (en) * | 2000-12-04 | 2007-01-09 | Battelle Energy Alliance, Llc | Subterranean barriers including at least one weld |
| US6758634B2 (en) * | 2001-02-06 | 2004-07-06 | Bechtel Bwxt Idaho, Llc | Subsurface materials management and containment system |
| CA2503216C (en) * | 2004-04-06 | 2012-11-27 | Claude J. Degarie | Membrane-covered reservoir having a hatchway therein |
| US20080273955A1 (en) * | 2007-05-02 | 2008-11-06 | International Truck Intellectual Property Company, Llc. | Refuse collection device and disposal method for public transportation vehicles |
| CN102183343A (zh) * | 2011-03-18 | 2011-09-14 | 华侨大学 | 垃圾填埋场渗沥液渗漏及其位置检测装置 |
| JP5250724B1 (ja) * | 2013-03-14 | 2013-07-31 | 株式会社フジコーポレーション | 最終処分場の底版構造 |
| JP5250725B1 (ja) * | 2013-03-14 | 2013-07-31 | 株式会社フジコーポレーション | 最終処分場の垂直壁構造 |
| US10227749B2 (en) * | 2017-04-28 | 2019-03-12 | R&B Leasing | Landfill liner system |
| US20220221368A1 (en) * | 2019-05-07 | 2022-07-14 | Les Systemes Flyscan Inc. | System And Method For Determining An Indication Of A Presence Of A Leak Of Hazardous Material Using A Trained Classification Module |
| CN116479948A (zh) * | 2023-04-27 | 2023-07-25 | 河南省地质环境规划设计院有限公司 | 一种垃圾处理厂地下水防渗帷幕 |
| CN119491471A (zh) * | 2025-01-15 | 2025-02-21 | 中国水利水电第九工程局有限公司 | 一种基于水利施工的堤防防渗处理方法 |
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| DE3919326A1 (de) * | 1989-06-13 | 1990-12-20 | Holzmann Philipp Ag | In einen untergrund eingebrachte schmalwand oder schlitzwand mit darin befindlicher dichtwandmasse |
| DE4015190A1 (de) * | 1990-05-11 | 1991-11-21 | Gore W L & Ass Gmbh | Flachbodentank und verfahren zur leckueberwachung von flachbodentanks |
| DE4021893A1 (de) * | 1990-07-10 | 1992-01-23 | Noell Gmbh | Verfahren und untersuchungseinrichtung zur feststellung der kontamination einer deponie |
| DE4109520A1 (de) * | 1991-03-22 | 1992-09-24 | Siemens Ag | Einrichtung zum abdichten und ueberwachen eines volumens |
| DE9108428U1 (de) * | 1991-07-08 | 1991-09-19 | Siemens AG, 8000 München | Element zum Abdichten und Überwachen eines Körpers mittels eines Kontrollraums |
| DE9108467U1 (de) * | 1991-07-09 | 1991-09-19 | Siemens AG, 80333 München | Element zum gas- und flüssigkeitsdichten Sichern und Überwachen eines Körpers, insbesondere einer Abfalldeponie |
| US5261764A (en) * | 1992-07-28 | 1993-11-16 | Walles Wilhelm E | In situ conversion of a single walled tank to a double walled tank |
-
1992
- 1992-04-24 DE DE4213585A patent/DE4213585A1/de not_active Withdrawn
-
1993
- 1993-04-21 SK SK1289-94A patent/SK128994A3/sk unknown
- 1993-04-21 DK DK93908801.9T patent/DK0637271T3/da active
- 1993-04-21 EP EP93908801A patent/EP0637271B1/de not_active Expired - Lifetime
- 1993-04-21 RU RU94045958/28A patent/RU94045958A/ru unknown
- 1993-04-21 CA CA002134100A patent/CA2134100A1/en not_active Abandoned
- 1993-04-21 WO PCT/DE1993/000345 patent/WO1993022076A1/de not_active Ceased
- 1993-04-21 ES ES93908801T patent/ES2105244T3/es not_active Expired - Lifetime
- 1993-04-21 AU AU39475/93A patent/AU669703B2/en not_active Ceased
- 1993-04-21 CZ CZ942567A patent/CZ256794A3/cs unknown
- 1993-04-21 DE DE59306938T patent/DE59306938D1/de not_active Expired - Fee Related
- 1993-04-21 AT AT93908801T patent/ATE155367T1/de not_active IP Right Cessation
- 1993-04-21 JP JP5518821A patent/JPH07505827A/ja active Pending
-
1994
- 1994-10-24 US US08/328,071 patent/US5570974A/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2431907A1 (de) * | 1974-07-03 | 1976-01-15 | Issel Wolfgang | Verfahren zur aufnahme von konzentrationsprofilen von substanzen laengs einer strecke |
| US5076728A (en) * | 1990-04-25 | 1991-12-31 | Tracer Research Corporation | Landfill liner leak detection system and method |
| DE9107693U1 (de) * | 1991-03-22 | 1991-08-22 | Siemens AG, 80333 München | Element zum Abdichten und Überwachen eines Körpers, insbesondere einer Abfalldeponie |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE155367T1 (de) | 1997-08-15 |
| SK128994A3 (en) | 1995-09-13 |
| CA2134100A1 (en) | 1993-11-11 |
| ES2105244T3 (es) | 1997-10-16 |
| CZ256794A3 (en) | 1995-11-15 |
| RU94045958A (ru) | 1996-08-20 |
| EP0637271A1 (de) | 1995-02-08 |
| DK0637271T3 (da) | 1998-02-09 |
| AU669703B2 (en) | 1996-06-20 |
| DE59306938D1 (de) | 1997-08-21 |
| AU3947593A (en) | 1993-11-29 |
| JPH07505827A (ja) | 1995-06-29 |
| EP0637271B1 (de) | 1997-07-16 |
| US5570974A (en) | 1996-11-05 |
| DE4213585A1 (de) | 1993-10-28 |
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