Method and device for checking the seal of structural seals

Abstract

The invention relates to a method for determining weak points with a reduced material thickness in a structural seal (3) having a high electrical dielectric strength in comparison to air, said seal provided with an electrically conducting layer (6, 7) disposed inside or outside of the structural seal (3), the electrically conducting layer (7) that is electrically separated from the electrically conducting layer (6) by the structural seal and that two all extend substantially over the entire surface of the structural seal. The level of the test voltage between the electrically conducting layers (6, 7) under voltage is selected such that the weak point is present in the structural seal, the electrical dielectric strength is surpassed and an electric arc or spark forms at the location of the damaged, faulty and / or weak point, wherein the test voltage is selected to be less than a destructive test voltage at which an electric breakdown would result in an undamaged and / or un-weakened structural seal corresponding to the structural seal (3) to be tested, thereby forming an electric arc or spark. Also claimed is a correspondingly designed structural seal (3).

Description

technical field [0001] The invention relates to a method and a device for leak detection of building seals. The invention relates in particular to a method for determining the location of damage or defects, in particular weak points of reduced material strength on membrane-type, non-conductive or only slightly conductive building seals, which are relatively air-resistant Has a high dielectric strength and is provided with a conductive layer, the conductive layer is arranged inside or outside the building seal, the conductive layer extends through the building seal substantially covering the entire plane, and a detection voltage is applied to the conductive layer; the invention also relates to A diaphragm-type building seal consisting of a non-conductive or only slightly conductive material having a high dielectric strength with respect to air, the building seal having features for determining damage or Detection device for the location of defects, in particular for the determ...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the cost of the double sealing system is too high, and the positioning of the damage position will be biased in the case of no sealing

[0014] This is because the seal is implicitly located on the back side of the tunnel inner shell and there is no or only scattered information about the location of the leak, so that the repair of leaks in the tunnel seal has hitherto required extensive and expensive injection measures, These measures, despite their high cost, have often been less successful, as a result, many tunnels, while remaining repaired for leaks, have incurred significantly increased maintenance costs over time

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