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Post construction deformation of modern Greek rockfill dams
This paper presents experiences acquired by monitoring postconstruction deformations in several large Greek rockfill dams (Thissavros, Smokovo, Gratini, Pramoritsa and Papadia). All dams have clay cores (central or slightly inclined upstream) and rockfill shoulders, with the exception of Gratini, having composite sandy gravel - rockfill shells. Embankment deformations were recorded on benchmarks placed on the crest and the shoulders. An effort is made to correlate the deformation patterns to various factors (such as fill material properties, construction time history, rate of reservoir filling etc), considering also relevant information from other dams worldwide. In most of the dams, no signs of instability (such as cracks, depressions or heaves in the fill etc.) were recorded during first reservoir filling or during operation, so monitoring of movements was done rather routinely. In the case of Smokovo and Gratini dams, where some doubts about the satisfactory embankment performance were raised, either before or during reservoir impoundment, monitoring provided valuable information confirming that concerns were unfounded. The case of Gratini dam, where rather excessive deformations and cracks on the fill were recorded during reservoir filling, is presented in more detail.
Post construction deformation of modern Greek rockfill dams
This paper presents experiences acquired by monitoring postconstruction deformations in several large Greek rockfill dams (Thissavros, Smokovo, Gratini, Pramoritsa and Papadia). All dams have clay cores (central or slightly inclined upstream) and rockfill shoulders, with the exception of Gratini, having composite sandy gravel - rockfill shells. Embankment deformations were recorded on benchmarks placed on the crest and the shoulders. An effort is made to correlate the deformation patterns to various factors (such as fill material properties, construction time history, rate of reservoir filling etc), considering also relevant information from other dams worldwide. In most of the dams, no signs of instability (such as cracks, depressions or heaves in the fill etc.) were recorded during first reservoir filling or during operation, so monitoring of movements was done rather routinely. In the case of Smokovo and Gratini dams, where some doubts about the satisfactory embankment performance were raised, either before or during reservoir impoundment, monitoring provided valuable information confirming that concerns were unfounded. The case of Gratini dam, where rather excessive deformations and cracks on the fill were recorded during reservoir filling, is presented in more detail.
Post construction deformation of modern Greek rockfill dams
Verformungen moderner griechischer Gesteins-Staudämme nach dem Bau
Anastassopoulos, K. (author) / Dounias, G. (author) / Oikonomidis, C. (author) / Papachatzaki, Z.R. (author) / Siachou, S. (author)
2009
6 Seiten, 16 Bilder, 2 Tabellen, 10 Quellen
Conference paper
English
Damm , Dammbau , Staudamm , Wasserbau , Felsmechanik , Verformung , Verformung unter Last , Überwachung , Riss , Griechenland , Gestein
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