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Geophysical methods for controlling the seepage regime in earth dams
Summary Geophysical methods appreciably increase the amount and quality of information provided by observations aimed at investigating the seepage regime of earth dams. The use of these methods for studying seepage processes is predetermined by a significant differentiation of electric, seismic and thermal properties of dry and water-saturated grounds. The seepage flow level is a contrast electric and seismic limit. A complex of electrometric, seismic and thermometric observations made so far allows to control the position and configuration of the depression surface in a dam supporting mass. Geophysical observations of the regime by resistivity and natural electric field methods allow to establish the presence of active zones of ground redeposition and mechanical suffosion and to assess the development of suffusion processes with time. Practice has shown that local suffosion zones can be isolated by geophysical methods long before their detection by field hydrotechnical observations. In order to increase the reliability of the results of regime geophysical investigations, the authors have devised special probability-statistical techniques for processing potential geophysical fields with recalculation to the area adjacent to the anomaly inducing objects. The positive results obtained in Central Asia and Transcaucasia permit to recommend extensive application of geophysical methods when conducting field observations of hydrotechnical structures.
Geophysical methods for controlling the seepage regime in earth dams
Summary Geophysical methods appreciably increase the amount and quality of information provided by observations aimed at investigating the seepage regime of earth dams. The use of these methods for studying seepage processes is predetermined by a significant differentiation of electric, seismic and thermal properties of dry and water-saturated grounds. The seepage flow level is a contrast electric and seismic limit. A complex of electrometric, seismic and thermometric observations made so far allows to control the position and configuration of the depression surface in a dam supporting mass. Geophysical observations of the regime by resistivity and natural electric field methods allow to establish the presence of active zones of ground redeposition and mechanical suffosion and to assess the development of suffusion processes with time. Practice has shown that local suffosion zones can be isolated by geophysical methods long before their detection by field hydrotechnical observations. In order to increase the reliability of the results of regime geophysical investigations, the authors have devised special probability-statistical techniques for processing potential geophysical fields with recalculation to the area adjacent to the anomaly inducing objects. The positive results obtained in Central Asia and Transcaucasia permit to recommend extensive application of geophysical methods when conducting field observations of hydrotechnical structures.
Geophysical methods for controlling the seepage regime in earth dams
Bogoslovsky, V. A. (author) / Kuzmina, E. N. (author) / Ogilvy, A. A. (author) / Strakhova, N. A. (author)
1979
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Geophysical methods for controlling the seepage regime in earth dams
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