Seal control of landfills using Taupe cable sensors
The Hintere Dollert landfill in the district of Gaggenau-Oberweier was sealed off over an area of approx. 20,000 m² with the capillary barrier system with optimized root soil (test field). In this sealing system, a comprehensive system for controlling changes in water content (TAUPE system) is arranged in the lower area of the root soil (above the capillary barrier) and in a control layer (below the capillary barrier). This controls the watertightness of the sealing system. The decisive parameter for the water balance is the (un)saturated hydraulic conductivity. This is a soil property, ie it is directly linked to the water content (WG). This means that a method is available with which the areal recording of the hydraulic conductivity is possible at any desired point in time. From this, the water balance of landfill surface sealing can be determined, locally resolved, and the flow through the surface sealing system can be quantified.
sandwich project
Manhole closures play a major role in connection with nuclear disposal. The aim here is to prevent water from entering from the adjacent rock in order to ensure the long-term safety of the nuclear storage facility. that on KIT developed the so-called sandwich system consists of alternating sealing segments made of bentonite and equipotential segments, which are characterized by high electrical conductivity. In the equipotential segments, the liquid that enters is distributed over the entire segment cross-section, while the liquid in the adjacent sealing segment is intercepted by the swelling of the bentonite. The functionality of the system was tested in laboratory and semi-technical experiments.
