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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10174009%21RIV14-GA0-11310___
rdf:type
n4:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1016/j.enggeo.2013.05.026
dcterms:description
A formalism for double structure hydromechanical coupled modelling of aggregated unsaturated soils has been developed. Independent coupled hydromechanical models are considered for each structural level, including independent measures of macromechanical and micromechanical effective stresses. The models are linked using a coupling function to obtain the global response. The individual components have been selected to represent the behaviour of compacted expansive clays. The macrostructural mechanical model is based on the existing hypoplastic model for unsaturated soils. Hydromechanical coupling at each structural level is efficiently achieved by linking the effective stress formulation with the water retention model. An essential component of the model is representation of microstructural swelling. It is demonstrated that its calibration on wetting induced expansion measured in oedometric (mechanical) tests leads to a correct global hydraulic response, providing a supporting argument for the adopted coupling approach. An interesting consequence of the model formulation is that it does not suffer from volumetric rachetting, which is often regarded as one of the main drawbacks of hypoplasticity. The proposed model has a small number of material parameters. Its predictive capabilities have been confirmed by simulation of comprehensive experimental data set on compacted Boom clay. A formalism for double structure hydromechanical coupled modelling of aggregated unsaturated soils has been developed. Independent coupled hydromechanical models are considered for each structural level, including independent measures of macromechanical and micromechanical effective stresses. The models are linked using a coupling function to obtain the global response. The individual components have been selected to represent the behaviour of compacted expansive clays. The macrostructural mechanical model is based on the existing hypoplastic model for unsaturated soils. Hydromechanical coupling at each structural level is efficiently achieved by linking the effective stress formulation with the water retention model. An essential component of the model is representation of microstructural swelling. It is demonstrated that its calibration on wetting induced expansion measured in oedometric (mechanical) tests leads to a correct global hydraulic response, providing a supporting argument for the adopted coupling approach. An interesting consequence of the model formulation is that it does not suffer from volumetric rachetting, which is often regarded as one of the main drawbacks of hypoplasticity. The proposed model has a small number of material parameters. Its predictive capabilities have been confirmed by simulation of comprehensive experimental data set on compacted Boom clay.
dcterms:title
Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays
skos:prefLabel
Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays Double structure hydromechanical coupling formalism and a model for unsaturated expansive clays
skos:notation
RIV/00216208:11310/13:10174009!RIV14-GA0-11310___
n4:predkladatel
n19:orjk%3A11310
n3:aktivita
n14:I n14:P
n3:aktivity
I, P(GAP105/12/1705)
n3:cisloPeriodika
October
n3:dodaniDat
n7:2014
n3:domaciTvurceVysledku
n12:6661025
n3:druhVysledku
n18:J
n3:duvernostUdaju
n21:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
70511
n3:idVysledku
RIV/00216208:11310/13:10174009
n3:jazykVysledku
n13:eng
n3:klicovaSlova
Water retention curve; Hydromechanical behaviour; Hypoplasticity; Unsaturated soils; Double structure; Expansive soils
n3:klicoveSlovo
n5:Water%20retention%20curve n5:Double%20structure n5:Expansive%20soils n5:Unsaturated%20soils n5:Hypoplasticity n5:Hydromechanical%20behaviour
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[2199A88A3B4A]
n3:nazevZdroje
Engineering Geology
n3:obor
n15:JM
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
1
n3:projekt
n20:GAP105%2F12%2F1705
n3:rokUplatneniVysledku
n7:2013
n3:svazekPeriodika
165
n3:tvurceVysledku
Mašín, David
n3:wos
000327284100008
s:issn
0013-7952
s:numberOfPages
16
n16:doi
10.1016/j.enggeo.2013.05.026
n9:organizacniJednotka
11310