Εκτίμηση συντελεστή ασφαλείας για την ταπείνωση της στέψης χωμάτινων φραγμάτων

Translated title of the contribution: Estimation of a safety threshold for the crest settlements of embankment dams

Stella Pytharouli, Stathis Stiros

Research output: Contribution to conferencePaper

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Abstract

The crest settlements of embankment dams with a central clay core are usually described as an exponential function of time. They play a major role in the safety and operational capacity of the dam, especially when taking into account that extreme crest settlements that have been observed for some of these dams have resulted in a significant reduction of the storage capacity of the reservoir and maintenance works at large scales and cost (e.g. Ataturk dam, Turkey). We studied the crest settlements of > 40 embankment dams, 10-41 years old, located at different parts of the world. Our analysis shows that the safety threshold for the crest settlements should not be a constant but increase with the age of the dam and that most of suggested thresholds in the literature are too conservative. A safety threshold of 1% (crest settlement to dam height ratio) appears to be realistic for the whole operational life of the dam. The Kremasta dam, whose age and size places it to a most critical situation, has a crest settlement to dam height ratio value well below the above threshold.
Original languageOther
Number of pages9
Publication statusPublished - 7 Nov 2013
EventNational ICOLD conference on Dams and Reservoirs - Athens, Greece
Duration: 7 Nov 20138 Nov 2013
Conference number: 2

Conference

ConferenceNational ICOLD conference on Dams and Reservoirs
CountryGreece
CityAthens
Period7/11/138/11/13

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Embankment dams
Dams
Exponential functions
Clay

Keywords

  • crest settlements
  • embankment dams
  • Kremasta Dam

Cite this

Pytharouli, S., & Stiros, S. (2013). Εκτίμηση συντελεστή ασφαλείας για την ταπείνωση της στέψης χωμάτινων φραγμάτων. Paper presented at National ICOLD conference on Dams and Reservoirs, Athens, Greece.
Pytharouli, Stella ; Stiros, Stathis. / Εκτίμηση συντελεστή ασφαλείας για την ταπείνωση της στέψης χωμάτινων φραγμάτων. Paper presented at National ICOLD conference on Dams and Reservoirs, Athens, Greece.9 p.
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abstract = "The crest settlements of embankment dams with a central clay core are usually described as an exponential function of time. They play a major role in the safety and operational capacity of the dam, especially when taking into account that extreme crest settlements that have been observed for some of these dams have resulted in a significant reduction of the storage capacity of the reservoir and maintenance works at large scales and cost (e.g. Ataturk dam, Turkey). We studied the crest settlements of > 40 embankment dams, 10-41 years old, located at different parts of the world. Our analysis shows that the safety threshold for the crest settlements should not be a constant but increase with the age of the dam and that most of suggested thresholds in the literature are too conservative. A safety threshold of 1{\%} (crest settlement to dam height ratio) appears to be realistic for the whole operational life of the dam. The Kremasta dam, whose age and size places it to a most critical situation, has a crest settlement to dam height ratio value well below the above threshold.",
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Pytharouli, S & Stiros, S 2013, 'Εκτίμηση συντελεστή ασφαλείας για την ταπείνωση της στέψης χωμάτινων φραγμάτων' Paper presented at National ICOLD conference on Dams and Reservoirs, Athens, Greece, 7/11/13 - 8/11/13, .

Εκτίμηση συντελεστή ασφαλείας για την ταπείνωση της στέψης χωμάτινων φραγμάτων. / Pytharouli, Stella; Stiros, Stathis.

2013. Paper presented at National ICOLD conference on Dams and Reservoirs, Athens, Greece.

Research output: Contribution to conferencePaper

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T1 - Εκτίμηση συντελεστή ασφαλείας για την ταπείνωση της στέψης χωμάτινων φραγμάτων

AU - Pytharouli, Stella

AU - Stiros, Stathis

PY - 2013/11/7

Y1 - 2013/11/7

N2 - The crest settlements of embankment dams with a central clay core are usually described as an exponential function of time. They play a major role in the safety and operational capacity of the dam, especially when taking into account that extreme crest settlements that have been observed for some of these dams have resulted in a significant reduction of the storage capacity of the reservoir and maintenance works at large scales and cost (e.g. Ataturk dam, Turkey). We studied the crest settlements of > 40 embankment dams, 10-41 years old, located at different parts of the world. Our analysis shows that the safety threshold for the crest settlements should not be a constant but increase with the age of the dam and that most of suggested thresholds in the literature are too conservative. A safety threshold of 1% (crest settlement to dam height ratio) appears to be realistic for the whole operational life of the dam. The Kremasta dam, whose age and size places it to a most critical situation, has a crest settlement to dam height ratio value well below the above threshold.

AB - The crest settlements of embankment dams with a central clay core are usually described as an exponential function of time. They play a major role in the safety and operational capacity of the dam, especially when taking into account that extreme crest settlements that have been observed for some of these dams have resulted in a significant reduction of the storage capacity of the reservoir and maintenance works at large scales and cost (e.g. Ataturk dam, Turkey). We studied the crest settlements of > 40 embankment dams, 10-41 years old, located at different parts of the world. Our analysis shows that the safety threshold for the crest settlements should not be a constant but increase with the age of the dam and that most of suggested thresholds in the literature are too conservative. A safety threshold of 1% (crest settlement to dam height ratio) appears to be realistic for the whole operational life of the dam. The Kremasta dam, whose age and size places it to a most critical situation, has a crest settlement to dam height ratio value well below the above threshold.

KW - crest settlements

KW - embankment dams

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M3 - Paper

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