MONITORING OF DAMS AND DIKES USING TDR
In many cases geotechnical engineers are interested in qualitative or even quantitative water content distributions characterising the hydraulic situations within earth structures in order to assess the efficiency of structural elements (e.g. the sealing element) or the stability of the system. One possible method to measure water contents is Time Domain Reflectometry (TDR), which is widely-used especially in hydrology or soil-physics. For this method moisture sensitive transmission lines (flat band cables) are used, which are buried in the soil. Electromagnetic pulses are applied to the sensor and the reflections are recorded with a time domain reflectometer. With a new inversion algorithm, which uses the full information content of the TDR reflection data, the spatial variability of the dielectric properties of the soil, respectively the water content around the transmission line, can be determined (spatial TDR). This new measurement system was used in a full-scale dike model for the first time. Transient water transport processes could be monitored for the first time with this new method. Also conventional TDR methods can be used for monitoring purposes in dikes or dams in order to estimate the effectiveness of structural elements like the upstream sealing. Both possibilities of application are presented in this paper.
Time domain reflect
Alexander Scheuermann Andreas Bieberstein
Institute of Soil Mechanics and Rock MechanicsDivision of Embankment Dams and Landfill TechnologyUni Institute of Soil Mechanics and Rock Mechanics Division of Embankment Dams and Landfill Technology U
国际会议
西安
英文
1-10
2005-11-01（万方平台首次上网日期，不代表论文的发表时间）