Statistical analysis of experimentally determined critical hydraulic gradients for heave

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F20%3APU136827" target="_blank" >RIV/00216305:26110/20:PU136827 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.icevirtuallibrary.com/doi/full/10.1680/jgele.19.00054" target="_blank" >https://www.icevirtuallibrary.com/doi/full/10.1680/jgele.19.00054</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1680/jgele.19.00054" target="_blank" >10.1680/jgele.19.00054</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Statistical analysis of experimentally determined critical hydraulic gradients for heave

Popis výsledku v původním jazyce

Heave is a type of deformation that occurs due to seepage, which may evolve into backward erosion piping and eventually lead to the total collapse of a hydraulic structure. It may occur downstream of the hydraulic structure when uniform non-cohesive soil is subjected to upward seepage. In this study, the limit state condition for heave was formulated based on the equilibrium of acting forces and with the use of corresponding partial factors. During extensive laboratory research, glass beads of 0·2, 0·5 and 1·0 mm in diameter, three natural and three artificially prepared sands with grain diameters ranging from 0 to 4 mm and a uniformity coefficient CU ranging from 1·4 to 5 were subjected to upward seepage in cylindrical permeameter. The hydraulic gradient was gradually raised until heave of the material occurred. The porosity of specimens varied from 0·31 to 0·54 according to the method of placement and compaction degree. In total, 425 experiments were carried out. The results were statistically processed for nine sets of materials and partial factors were derived for a selected structure reliability. The values obtained for the factors may be used by practitioners during the safety assessment of the hydraulic structures exposed to potential heave.

Název v anglickém jazyce

Statistical analysis of experimentally determined critical hydraulic gradients for heave

Popis výsledku anglicky

Heave is a type of deformation that occurs due to seepage, which may evolve into backward erosion piping and eventually lead to the total collapse of a hydraulic structure. It may occur downstream of the hydraulic structure when uniform non-cohesive soil is subjected to upward seepage. In this study, the limit state condition for heave was formulated based on the equilibrium of acting forces and with the use of corresponding partial factors. During extensive laboratory research, glass beads of 0·2, 0·5 and 1·0 mm in diameter, three natural and three artificially prepared sands with grain diameters ranging from 0 to 4 mm and a uniformity coefficient CU ranging from 1·4 to 5 were subjected to upward seepage in cylindrical permeameter. The hydraulic gradient was gradually raised until heave of the material occurred. The porosity of specimens varied from 0·31 to 0·54 according to the method of placement and compaction degree. In total, 425 experiments were carried out. The results were statistically processed for nine sets of materials and partial factors were derived for a selected structure reliability. The values obtained for the factors may be used by practitioners during the safety assessment of the hydraulic structures exposed to potential heave.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Geotechnique Letters

ISSN

2049-825X

e-ISSN

2045-2543

Svazek periodika

10

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

377-384

Kód UT WoS článku

000590269700043

EID výsledku v databázi Scopus

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