EP2310577A1 - Procédé et dispositif pour essais d'étanchéité sur étanchements d'ouvrages - Google Patents

Procédé et dispositif pour essais d'étanchéité sur étanchements d'ouvrages

Info

Publication number
EP2310577A1
EP2310577A1 EP09780849A EP09780849A EP2310577A1 EP 2310577 A1 EP2310577 A1 EP 2310577A1 EP 09780849 A EP09780849 A EP 09780849A EP 09780849 A EP09780849 A EP 09780849A EP 2310577 A1 EP2310577 A1 EP 2310577A1
Authority
EP
European Patent Office
Prior art keywords
electrically conductive
structural
seal
conductive layers
waterproofing
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.)
Granted
Application number
EP09780849A
Other languages
German (de)
English (en)
Other versions
EP2310577B1 (fr
Inventor
Andreas Rödel
Norbert Komma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Progeo Monitoring GmbH
Original Assignee
Progeo Monitoring GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Progeo Monitoring GmbH filed Critical Progeo Monitoring GmbH
Publication of EP2310577A1 publication Critical patent/EP2310577A1/fr
Application granted granted Critical
Publication of EP2310577B1 publication Critical patent/EP2310577B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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 present invention relates to a method and a device for leak testing of structural waterproofing.
  • the invention relates to a method for the splitting of defects or imperfections, in particular weak points having a reduced material thickness on a membrane-like, electrically or only slightly conductive structural seal, which has a high dielectric strength in comparison to air and provided with an electrically conductive layer is that is disposed inside or outside the structural waterproofing, extends substantially over the entire surface of the building seal and to which an electrical test voltage is applied, and a membrane-like waterproofing of electrically non-conductive or only slightly conductive material, which in comparison to air high electrical breakdown strength having, with a an electrical voltage source having test device for detecting damage or defects, in particular a reduced material thickness having weak points on the Bauwe gasket, and an electrically conductive layer which is disposed inside or outside of the structural waterproofing and extends substantially over the entire surface of the structural waterproofing.
  • Membrane-like seals have a significant share of the structural waterproofing to date.
  • the task of structural waterproofing is to safely protect the structure against the ingress of groundwater, soil moisture and rainwater, thereby reliably avoiding damage to the building structure and restrictions on the use of the structure over the entire life of the building.
  • Membrane-type seals usually consist of bituminous materials or of the mass plastics available today and are increasingly being produced industrially as sheet-like products but also as a sealing compound to be applied over the entire surface of the construction site.
  • Membrane-type structural waterproofing must be watertight to fulfill its function.
  • the seal in these systems, the seal is designed so that on the intended dry side of the seal a visual control option is created so that penetrating leakage water can be detected in the course of an inspection.
  • the monitoring can also be automated.
  • Disadvantage of this design is that a leak location is practically impossible, as well as leakage water can not be distinguished from occurring condensation, so that a clear leak detection is not possible in practice.
  • Another disadvantage is that a check of the seal is always bound to the fact that the seal is applied or was already at the time of the test with water.
  • Vacuum systems In these systems, the seal is designed for two days in such a way that an evacuable space is created between the gasket layers. If the control room evacuated to a certain negative pressure, it can be concluded about the increase in pressure over time on the tightness of the seal. Advantage of this system is that the tightness of the seal can also be checked independently of the application of water. Disadvantage of the method are the high cost of the double seal system and the lack of opportunity in the event of a leak to localize the damage site targeted. Electro-resistive systems: These systems make use of the fact that, in terms of materials, membrane-type seals have a high electrical resistivity and high dielectric strength. Different configurations are available:
  • leakage detection is basically only possible if the seal is exposed to water or moist cover material and has formed by penetrating moisture a conductive path in the leakage point. If the measurement is made from the upper side of the seal, the entire sealing surface must be scanned manually with the tester to check the seal. This requires considerable time and leads to reliable results only with sufficient expertise.
  • sealing damage poses a very great risk, because sealing damage is usually recognized only by water ingress into the finished tunnel, since first the dewatering must be adjusted before the hydrostatic load pressure sets on the seal and sealing with water for the first time is charged. Due to the pressure build-up there is a further risk of damage to the seal, because with As the external pressure increases, the seal is pressed more and more against the concrete inner shell. If areas of the inner shell are not completely concreted out, the seal is pressed onto the exposed reinforcement of the inner shell and perforated, so that further damage risks exist.
  • the present invention has for its object to provide a method for leak-tightness of membrane-like, electrically or only slightly conductive structural waterproofing that allows a full-surface tightness test of such seals, regardless of whether the seal is applied to a substrate or sub- and / or is free on the upper side, is overbuilt with a reinforcement or is completely inaccessible embedded in the building structure.
  • the desired method should allow a tightness control even if the seal to be tested is not yet overbuilt with moist materials or in contact with water.
  • the desired method should allow the localization or preferably localization of existing defects in the seal to be tested.
  • the invention has for its object to provide a membrane-like structural seal, which is provided with a corresponding test device, which allows the implementation of the desired method.
  • the method according to the invention serves to detect defects or defects, in particular weak points having a reduced material thickness on a membrane-like, electrically or only slightly conductive structural seal, which has a high electrical breakdown strength in comparison to air.
  • Structural waterproofing is provided with a (first) electrically conductive layer which is arranged inside or outside the structural waterproofing and extends substantially over the whole area over the structural waterproofing.
  • a further electrically conductive layer is used, which is electrically separated from the said electrically conductive layer by the structural seal and likewise extends substantially over the entire surface of the building seal.
  • test voltage is applied to the two electrically conductive layers, the height of which is selected so that it is not electrically present in the presence of (at least) one conductive damage, faulty and / or weak point in the structural waterproofing to exceeding the electrical breakdown strength and the formation of an electric spark or arc at the site of damage, faulty and / or weak point comes, the test voltage is chosen to be smaller than a destructive Test voltage, in which corresponding to one of the structural seal to be tested undamaged and / or unattenuated structural seal an electrical breakdown would result in the formation of an electric spark or arc.
  • an edge region of the plastic sealing strip to be welded to an adjacent plastic sealing strip may optionally also be formed without an electrically conductive layer. According to the invention, preferably at least 90% of the area of the flat structural seal to be tested or
  • Plastic sealing membrane covered with the conductive layers over the entire surface.
  • the method according to the invention does without the disadvantages of the test methods of the prior art described at the outset. It allows a full-surface leak test of membranous, electrically or only slightly conductive
  • inventive method also allows the local limitation of existing defects in the seal to be tested. By combination with permanently installed potentiometric method can then continue to monitor the seal in the finished, iganbeierschischt tunnel structure.
  • the test voltage applied to the electrically conductive layers is selected such that it is at most 80% of an electrical voltage value at which an undamaged and / or non-weakened structural seal corresponding to one of the structural seals to be tested has an electrical breakdown an electric spark or arc.
  • weak points of the seal to be tested caused by material removal or layer thickness reduction are reliably detected, on the other hand it is ensured that intact surface areas of the seal, which have a required target thickness, are not destroyed by the electrical voltage application.
  • test voltage is steadily or gradually increased and / or it is tested in several test intervals, wherein the test voltage is increased in the respective subsequent test interval until the intact sealing corresponding bioprüfschreib is reached.
  • Different damage patterns for example material thickness reduction or continuous leaks
  • the seal to be tested is preferably subdivided into individual test sections, wherein the subdivision can be achieved by segmenting either one of the conductive layers or also both conductive layers in such a way that individual test sections of the seal to be controlled are subjected in sections allows this, in a favorable manner so that each seal web segment also forms a test segment.
  • the conductive layers and the seal to be tested are designed as a prefabricated multilayer sandwich system comprising conductive layers and at least one electrically insulating sealing layer conductive layers in a suitable manner, for example by gluing, laminating, laminating, co-extruding, vapor deposition or coating or combinations of these methods with the seal are partially or fully connected.
  • the conductive layers preferably have a surface resistance of less than 10 6 ohms and a resistivity of less than 10 5 ohm cm.
  • a further advantageous embodiment of the method according to the invention consists in that the test voltage is applied to one of the electrically conductive layers via at least two spatially spaced feed points, such that the current flows or corresponding electrical quantities, in particular the electrical voltage, at an electrical breakdown at a Schad -, Weak and / or weak point are measured, and that on the basis of the ratio of the current flows or corresponding electrical variables, in particular voltages, the location of the damage, faulty and / or weak point is determined. In this way, the location of a defect, fault and / or weak point of the seal can be determined relatively accurately, even if the seal to be tested is not or only partially accessible.
  • the measurement of the electrical voltage ratio is preferably carried out via one or more measuring probes, which are capacitively coupled indirectly to one of the conductive layers without galvanic connection.
  • the probes can be implemented in a simple manner, so that the location of a defect, faulty and / or weak point of the seal can optionally be determined or limited faster.
  • the measurement of the electrical voltage ratio can also over
  • Measuring probes are made, which are directly coupled to one of the conductive layers.
  • a further embodiment of the method according to the invention provides that an electrically conductive bearing layer of the structural waterproofing, for example a moist substrate, in particular a still relatively wet or hardened concrete layer, is used as one of the electrically conductive layers.
  • an electrically conductive bearing layer of the structural waterproofing for example a moist substrate, in particular a still relatively wet or hardened concrete layer
  • the production of a second or additional electrically conductive layer is dispensed with and an already existing electrically conductive support layer is used instead, which enables a corresponding cost saving.
  • the relatively smooth concrete ceiling can be used as an electrically conductive support layer.
  • a further advantageous embodiment of the method according to the invention is characterized in that at least the electrically conductive layer arranged on the accessible side of the structural seal is provided with an electrically non-conductive layer, preferably a light-colored, electrically insulating plastic film.
  • This electrically non-conductive layer protects against electric shock.
  • a light-colored version of this layer has a favorable effect on the visibility conditions of persons working within or in the field of structural waterproofing and also serves the visual recognition of mechanical damage.
  • the structural waterproofing is industrially prefabricated together with the electrically conductive layers and the electrically insulating layer (plastic film) as a sandwich-like composite film or composite sealing web, for example by coextrusion or laminating.
  • the electrically conductive layers and the electrically insulating layer plastic film
  • coextrusion of the various layers may sometimes lead to defects in the intermediate or embedded electrically conductive layer, which can preclude a reliable detection of damage and / or defects on the later to be tested structural waterproofing.
  • the entire surface of the at least on the accessible side of the structural seal arranged electrically conductive layer and / or the entire surface of training on the back of the Structural seal arranged electrically conductive layer is checked by means of electrical capacitance measurement.
  • the membrane-like structural seal according to the invention consists of electrically non-conductive material, so that it has a high electrical breakdown strength compared to air. It is provided with an electrical voltage source having a test device for detecting defects or defects, in particular a reduced material thickness having weak points on the structural waterproofing.
  • the structural waterproofing according to the invention is equipped with a (first) electrically conductive layer, which is arranged inside or outside the structural waterproofing and extends substantially over the whole area over the structural waterproofing.
  • the structural waterproofing is provided with a further electrically conductive layer, which is electrically separated from the said (first) electrically conductive layer by the structural sealing and extends essentially over the whole area over the structural waterproofing.
  • the test apparatus has means for adjusting the height of the test voltage that can be applied to the structural seal over the electrically conductive layers, so that the test voltage can be increased from zero or a minimum value greater than zero continuously or stepwise to an electrical voltage value which is reduced by a safety amount below is a destructive voltage at which would correspond to one of the structural seal to be tested undamaged and / or unattenuated structural seal an electrical breakdown with the formation of an electric spark or arc, and is higher than the dielectric strength of the building sealing thickness corresponding air gap by an amount of security is.
  • FIG. 1 shows a cross section of a tunnel with a building seal according to the invention.
  • Figures 2 to 6 are each a section of various structural waterproofing according to the invention in an enlarged cross-sectional view.
  • the vault of the tunnel shown in Fig. 1 was covered immediately after completion of the mountain outbreak 1 with shotcrete 2 and steel inserts. The propulsion of such a tunnel is usually carried out discontinuously in axial sections.
  • the reinforced shotcrete 2 forms an outer arch, whose inner surface is covered with a structural waterproofing 3.
  • the structural waterproofing 3 is intended to prevent ingress of water or moisture from the mountains in the region of the outer arch 2.
  • On the building waterproofing 3 follows inside a vault 4 made of concrete, which is referred to below as the inner shell. Before the interior vault or the inner shell 4 is concreted, the structural waterproofing 3 is tested for leaks. For this purpose, the structural waterproofing 3 is provided with a test device 5 for detecting any existing defects or defects.
  • the structural seal 3 to be tested is a seal with a material-based high insulation resistance and a high electrical breakdown strength compared to air.
  • this can be an electrical DC and / or alternating field.
  • the test voltage between the voltage-applied conductive layers 6, 7 is now chosen according to the invention such that, when the sealing strip 3 is intact, the dielectric strength is not exceeded at any point in the seal 3, but at the points where where the material strength of the voltage-loaded waterproofing membrane 3 due to damage due to the undamaged state reduced is and / or where damage or production due to imperfections in the seal 3 are present, for which purpose a test voltage of at least 1000 volts per millimeter thickness of the surface seal to be tested or waterproofing membrane 3 is used, with the result that it These points come to a voltage breakdown, which according to the invention can be detected and located in different ways.
  • the height of the voltage applied to the surface seal 3 to be tested via the conductive layers 6, 7 and also the current flow from the voltage source 8 into the test arrangement can be measured to carry out the method during the test procedure. If defects and / or imperfections in the surface seal 3 are present, it is according to the invention at these defects and / or defects, unless there is a direct short circuit between the conductive layers 6, 7 is due to damage, to exceed the
  • test voltage and charging current can be detected. If damage is present which causes a short-circuit of the conductive layers 6, 7 which is low compared to the resistance of the intact sealing material, this is recognized by the fact that, compared with the undamaged seal, this is significantly higher Short-circuit current flows even at a low test voltage, which is not sufficient for a spark discharge. Thus, with the method according to the invention, a short-circuit-related damage can be detected safely. However, if a predetermined test voltage is reached, without causing a short-circuit current or arc discharge current, the seal 3 is classified as intact, this in particular if the maximum test voltage has been previously without further discharge effects for a longer period of time.
  • the electrical resistance of the test object is determined from the quotient of voltage and current and used as a further quality criterion.
  • a local assignment of the location of the spark or of a short circuit and thus the local location of the damaged area can also be carried out if the feeding of the test voltage is effected via at least two feed points 9, 10 which are spaced apart from each other in space (cf. in longitudinally formed test sections preferably lie on the two opposite narrow sides of the test section, and the current flows or corresponding electrical variables, eg the electrical voltage at the time of electrical breakdown, i.
  • the current flows or corresponding electrical variables eg the electrical voltage at the time of electrical breakdown, i.
  • Strains of the location of the spark or short circuit and thus the location of the damaged area can be determined in good approximation, since this ratio largely corresponds to the distance ratio of the feed points to the location of the spark or short circuit.
  • the measurement of the voltage conditions in the event of a damage-caused short circuit or damage-caused spark discharge can also take place directly in one of the two conductive layers 6, 7 or indirectly without galvanic connection to the electrical measuring circuit by one or more capacitively coupled probes, e.g. from the visible side of the seal 3.
  • the occurrence of sparks or arcs can also be detected according to the invention by detecting the electromagnetic sparks (so-called bursts) emanating from the spark or arc with a suitable detector (not shown) and / or that from the arc light and / or heat radiation emitted at the damaged area and / or material heating effects are detected and evaluated in a suitable manner, for example by suitable image recording methods, also insofar as the detected interference signals and / or light and / or heat radiation and / or material heating effects for the localization of the spark and / or short circuit and thus the damage position can be used.
  • a camera (not shown), in particular a thermal imaging camera can be used.
  • the detection of the spark gap according to the invention takes place purely visually, either by detecting and localizing it during the existence of the arc or by detecting and locating the damaged area on the visible side of the seal 3 based on the changes caused by spark erosion and / or heat during sparking or after the sparking or short-circuit current has stopped.
  • At least one of the conductive layers 6, 7 is designed as a conductive fleece, woven fabric, knitted fabric or other fabric, wherein the required conductivity by addition of electrically conductive particles and / or fibers and / or threads and / or wires to the non-conductive nonwoven fabric, woven fabric, knitted fabric or fabrics and / or by a coating or impregnation of the non-conductive nonwoven fabric, fabric, knitted fabric or fabric with corresponding conductive materials and / or by a Metallevampfung the non-conductive nonwoven fabric, fabric, knitted or Sheet is achieved and / or a nonwoven fabric, woven, knitted or other fabric is used, which by using electrically conductive fibers and / or filaments having the conductivity required for carrying out the test method.
  • the electrical conductivity of the nonwoven fabric or other fabric is achieved by providing a highly hygroscopic material the support material of the nonwoven fabric or sheet is applied or incorporated into the support material, so that above a certain humidity of the substance in the hygroscopically absorbed moisture at least partially dissociated and an ionic, sufficient for performing the method according to the invention electrical conductivity of the nonwoven fabric or in the fabric absorbed liquid causes.
  • the application of the hygroscopic substance preferably takes place in the aqueous phase.
  • the nonwoven fabric or the other fabric in the microstructure of its surface facing towards the seal 3 to be tested is such that electrically conductive fibers, particles, threads and / or wires from the surface so stand out that when applying the test voltage between the conductive layers 6, 7 adjust high field strength peaks on the thus protruding parts, with the result that the ignition of arcs is favored in the presence of the intended damage prerequisites.
  • the carrier material of the nonwoven fabric or fabric 6, 7 consists of thermally significantly more resistant components compared to thermoplastics, preferably glass, metal and / or carbon fibers and / or more thermally stable, conductive particles, Fibers and / or filaments in order to prevent the surface of the nonwoven fabric or of the fabric 6, 7 in the region of the arc from prematurely melting and sticking or burning away or evaporating as a result of the heat development during the electric arc. This prevents that the arc extinguished prematurely and can not be ignited again at this point without it has come to the damaged area to a required for the visual detection thermally induced material change or for a thermographic detection sufficient material heating.
  • one or both conductive layers by means of which the seal 3 to be tested is delimited, form part of the building structure, eg the support of the seal 3 (eg the outer arch 2 in FIG. 1) and / or a constructive one Cover the seal 3 and points or have a relation to the sealing material significantly higher, sufficient for the conduct of the test method electrical conductivity, so that can be dispensed with the use of one or even both sandwiched in the seal 3 integrated conductive layers 6, 7 for performing the test method.
  • At least one of the conductive layers 6, 7 is not led to the edge of the seal 3, but only so far that the length and thus the dielectric strength of the air gap between the two loaded with test voltage layers larger is used as the leak test
  • At least one of the conductive layers 6, 7 is arranged inside the sealing strip 3, wherein this inner conductive layer 6 is narrower overall than the sealing strip 3 to be tested, so that the conductive layer 6 adjoins the web longitudinal sides is completely enclosed by electrically insulating sealing material and at the longitudinal edges of the geomembrane a sufficiently high dielectric strength with respect to the second conductive layer 7 is achieved for the implementation of the test method (see Fig. 2).
  • the conductive layer 6 arranged on the mountain side or on the underside of the seal or sealing membrane 3 is designed as a conductive fleece, the conductive fleece being largely flush on one longitudinal side of the geomembrane 3 up to the edge of the seal 3, on the other longitudinal side of the geomembrane 3 to be tested but in the width of the welding zone 1 1 protrudes from the edge of the web, so that the web before welding with the adjacent geomembrane 3 does not have to be removed from the welding zone consuming (see FIG. 3).
  • the conductive layer 61, 71 arranged in the region 11 of the subsequent welding zone may advantageously consist of an electrically conductive self-adhesive film or an electrically conductive self-adhesive fleece or of an electrically conductive, wipeable or washable coating.
  • the conductive layer 6, 7 can also be realized in the region of the welding zone 11 in such a way that the fleece arranged on the back of the sealant is applied in the entire width of the geomembrane 3 to be tested Area of the welding zone 11 has only a low adhesive tensile strength against the geomembrane 3, so that it can be detached after the tightness test and before welding without much effort in the welding zone and then can be brought out of the weld zone 11 by folding or cutting back.
  • the folding over of the conductive layer 6 or 7 is indicated in FIG. 5 by arrows.
  • the conductivity of at least one of the conductive layers 6, 7 is advantageously adjusted in its areal conductivity to the conductive layer 7 arranged within the seal 3 to be tested or arranged on the accessible visible side of the seal 3 in that, even when the maximum possible test voltage and complete electrical charging of the seal in the event of a short circuit between the conductive layers 6, 7, the maximum possible short-circuit or discharge current is limited by the conductive layer 7 which causes the internal resistance of the charged seal 3 It will be understood that there can be no danger to the test apparatus 5 itself or to life and limb, regardless of where it is sealing it to a contact or approximation to the test under test of Fr. emd emotions or people is coming.
  • This conductive layer 7 or both conductive layers 6, 7 preferably has a surface resistance of more than 10 4 ohms and a resistivity of more than 10 3 ohm cm.
  • a preferred embodiment of the structural seal according to the invention provides that on the visible side of the inner conductive layer 7, an electrically non-conductive foil or protective layer 12 is arranged, which preferably has a light color.
  • At least one of the required electrically conductive layers 6, 7 is formed as a metal foil or metallized plastic film or as a metallic or metallized other fabric, wherein at least one surface is electrically nonconductive.
  • Layer 7 is not damaged. Is between the thus formed conductive layer 7 and a laid after completion of the seal 3 steel reinforcement, e.g. a tunnel inner shell 4, the electrical resistance measured, it can be determined according to the invention, whether the reinforcement rests in a manner on the waterproofing 3, that the seal on the upper side has already been damaged, but without being pierced already, the position of the damage in the manner already described via the measurement of the phase currents or the resistance ratios or the voltage conditions when measuring over at least two spaced feed line or at least two spaced measuring points in one of the conductive layers 6, 7 can be limited so that the danger spot before the Concreting can be detected and eliminated.
  • the electrical resistance measured it can be determined according to the invention, whether the reinforcement rests in a manner on the waterproofing 3, that the seal on the upper side has already been damaged, but without being pierced already, the position of the damage in the manner already described via the measurement of the phase currents or the resistance ratios or the voltage conditions when measuring over at least two spaced feed line or at least two space
  • one of the conductive layers is designed so that it is firmly connected to the 3, wherein the conductive layer is not brought to at least one longitudinal side of the sealing strip 3 to be tested to the edge, but at least as far away from this, that a welding of the sealing strip 3 with its adjacent web 3 is possible without the conductive layer extends into the joining zone 11.
  • At least one of the conductive layers 6, 7 is formed so that it reaches up to the edge of the webs to be joined and thus into the joining zone, wherein it remains in the joining zone 11 during the joining process and during the joining process with the plastic material of the seal 3 which has been softened by joining so that the conductivity of the layer 6, 7 in the joining region is interrupted.
  • At least one conductive layer 6, 7 is formed as a peelable film-like layer on the seal 3 to be tested, so that the layer is at least partially removed from the extent required for joining individual sealing sheets 3 Seal 3 can be deducted.
  • the above-described conductive layer is also used to check during the concreting operation, e.g. when concreting a tunnel inner shell of the concrete to be concreted annulus is completely filled with concrete or if unfilled areas are present in which at later pressurized water, the tunnel seal is pressed unprotected on the reinforcement of the inner shell.
  • the electrical capacitance of one or both conductive layers is measured during the concreting process or thereafter against the introduced concrete and the measured values are compared with a desired value or a comparison value.
  • the embodiment or application of the invention is not limited to tunnels. Rather, the inventive method or the inventive Building waterproofing also advantageous in the tightness control of seals of landfills, liquid tanks and / or roofs, in particular flat roofs apply.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

L'invention concerne un procédé de détection des défauts et vices, en particulier des points faibles présentant une épaisseur réduite de matériau, sur un étanchement d'ouvrage (3) en forme de membrane, électriquement non conducteur ou faiblement conducteur qui, par rapport à l'air, présente une résistance disruptive élevée et qui est doté d'une couche électriquement conductrice (6) qui est placée à l'intérieur ou à l'extérieur de l'étanchement d'ouvrage (3), qui s'étend sensiblement sur la totalité de la surface de l'étanchement d'ouvrage et à laquelle est appliquée une tension électrique d'essai. Afin d'identifier lesdits défauts, vices et/ou points faibles, on utilise une autre couche électriquement conductrice (7) qui est séparée électriquement de ladite couche électriquement conductrice (6) par l'étanchement d'ouvrage et qui s'étend sensiblement sur la totalité de la surface de l'étanchement d'ouvrage. La tension d'essai entre les couches électriquement conductrices (6, 7) soumises à la tension est choisie pour que, en présence d'au moins un défaut, vice et/ou point faible électriquement non conducteur dans l'étanchement d'ouvrage, la résistance disruptive soit dépassée et provoque la formation d'une étincelle ou d'un arc électrique à l'endroit du défaut, du vice et/ou du point faible. La tension d'essai est inférieure à une tension d'essai destructrice à laquelle, sur un étanchement d'ouvrage non détérioré et/ou non affaibli correspondant à l'étanchement d'ouvrage (3) à l'essai, il se produirait un claquage électrique avec formation d'une étincelle ou d'un arc électrique. L'invention concerne en outre un étanchement d'ouvrage (3) configuré en conséquence.
EP09780849A 2008-07-19 2009-07-20 Procédé et dispositif pour essais d'étanchéité sur étanchements d'ouvrages Not-in-force EP2310577B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008033947A DE102008033947A1 (de) 2008-07-19 2008-07-19 Verfahren und Vorrichtung zur Dichtheitsprüfung von Bauwerksabdichtungen
PCT/EP2009/059322 WO2010010072A1 (fr) 2008-07-19 2009-07-20 Procédé et dispositif pour essais d'étanchéité sur étanchements d'ouvrages

Publications (2)

Publication Number Publication Date
EP2310577A1 true EP2310577A1 (fr) 2011-04-20
EP2310577B1 EP2310577B1 (fr) 2012-11-07

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Application Number Title Priority Date Filing Date
EP09780849A Not-in-force EP2310577B1 (fr) 2008-07-19 2009-07-20 Procédé et dispositif pour essais d'étanchéité sur étanchements d'ouvrages

Country Status (10)

Country Link
US (1) US8604799B2 (fr)
EP (1) EP2310577B1 (fr)
JP (1) JP5307890B2 (fr)
KR (1) KR20110040944A (fr)
CN (1) CN102099531B (fr)
AU (1) AU2009273292B2 (fr)
CA (1) CA2731369C (fr)
DE (1) DE102008033947A1 (fr)
ES (1) ES2398947T3 (fr)
WO (1) WO2010010072A1 (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US20110187394A1 (en) 2011-08-04
ES2398947T3 (es) 2013-03-22
EP2310577B1 (fr) 2012-11-07
DE102008033947A1 (de) 2010-01-21
CN102099531A (zh) 2011-06-15
CA2731369A1 (fr) 2010-01-28
US8604799B2 (en) 2013-12-10
JP5307890B2 (ja) 2013-10-02
WO2010010072A1 (fr) 2010-01-28
AU2009273292B2 (en) 2013-10-24
AU2009273292A1 (en) 2010-01-28
JP2011528758A (ja) 2011-11-24
CA2731369C (fr) 2016-09-20
KR20110040944A (ko) 2011-04-20
CN102099531B (zh) 2014-04-09

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