Discussion on the Safety Factors of Slopes Recommended for Small Dams

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F17%3APU123787" target="_blank" >RIV/00216305:26110/17:PU123787 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.11118/actaun201765020569" target="_blank" >https://doi.org/10.11118/actaun201765020569</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.11118/actaun201765020569" target="_blank" >10.11118/actaun201765020569</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Discussion on the Safety Factors of Slopes Recommended for Small Dams

Popis výsledku v původním jazyce

The design and assessment of the slope stability of small embankment dams is usually not carried out using slope stability calculations but rather by the comparison of proposed or existing dam slopes with those recommended by technical standards or guidelines. Practical experience shows that in many cases the slopes of small dams are steeper than those recommended. However, most of such steeper slopes at existing dams do not exhibit any visible signs of instability, defects or sliding. For the dam owner and also for dam stability engineers, the safety of the slope, expressed e.g. via a factor of safety, is crucial. The aim of this study is to evaluate the safety margin provided by recommended slopes. The factor of safety was evaluated for several dam shape and layout variants via the shear strength reduction method using PLAXIS software. The study covers various dam geometries, dam core and shoulder positions and parameter values of utilised soils. Three load cases were considered: one with a steady state seepage condition and two with different reservoir water level drawdown velocities – standard and critical. As numerous older small dams lack a drainage system, variants with and without a toe drain were assessed. Calculated factors of safety were compared with required values specified by national standards and guidelines.

Název v anglickém jazyce

Discussion on the Safety Factors of Slopes Recommended for Small Dams

Popis výsledku anglicky

The design and assessment of the slope stability of small embankment dams is usually not carried out using slope stability calculations but rather by the comparison of proposed or existing dam slopes with those recommended by technical standards or guidelines. Practical experience shows that in many cases the slopes of small dams are steeper than those recommended. However, most of such steeper slopes at existing dams do not exhibit any visible signs of instability, defects or sliding. For the dam owner and also for dam stability engineers, the safety of the slope, expressed e.g. via a factor of safety, is crucial. The aim of this study is to evaluate the safety margin provided by recommended slopes. The factor of safety was evaluated for several dam shape and layout variants via the shear strength reduction method using PLAXIS software. The study covers various dam geometries, dam core and shoulder positions and parameter values of utilised soils. Three load cases were considered: one with a steady state seepage condition and two with different reservoir water level drawdown velocities – standard and critical. As numerous older small dams lack a drainage system, variants with and without a toe drain were assessed. Calculated factors of safety were compared with required values specified by national standards and guidelines.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/TA04020670" target="_blank" >TA04020670: Využití spolehlivostních metod při technickobezpečnostním dohledu nad vodními díly s ohledem na jejich bezpečnost v období globálních klimatických změn.</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis

ISSN

1211-8516

e-ISSN

2464-8310

Svazek periodika

Volume 65

Číslo periodika v rámci svazku

2/2017

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

569-576

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85018454854