Modelling of earth and water pressure development during diaphragm wall construction in soft clay
Identifieur interne : 000C15 ( Istex/Curation ); précédent : 000C14; suivant : 000C16Modelling of earth and water pressure development during diaphragm wall construction in soft clay
Auteurs : R. Sch Fer [Allemagne] ; Th. Triantafyllidis [Allemagne]Source :
- International Journal for Numerical and Analytical Methods in Geomechanics [ 0363-9061 ] ; 2004-11.
English descriptors
Abstract
The influence of a diaphragm wall construction on the stress field in a soft clayey soil is investigated by the use of a three‐dimensional FE‐model of seven adjacent wall panels. The installation procedure comprises the excavation and the subsequent pouring of each panel taking into account the increasing stiffness of the placed fresh concrete. The soft clay deposit is described by a visco‐hypoplastic constitutive model considering the rheological properties and the small‐strain stiffness of the soil. The construction process considerably affects the effective earth and pore water pressures adjacent to the wall. Due to concreting, a high excess pore water pressure arises, which dissipates during the following construction steps. The earth pressure finally shows an oscillating, distinct three‐dimensional distribution along the retaining wall which depends on the installation sequence of the panels and the difference between the fresh concrete pressure and the total horizontal earth pressure at rest. In comparison to FE‐calculations adopting the earth pressure at rest as initial condition, greater wall deflections and surface ground settlements during the subsequent pit excavation can be expected, as the average stress level especially in the upper half of the wall is increased by the construction procedure of the retaining structure. Copyright © 2004 John Wiley & Sons, Ltd.
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DOI: 10.1002/nag.388
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Sch Fer</name><affiliation wicri:level="1"><mods:affiliation>Institute of Soil Mechanics and Foundation Engineering, Ruhr‐University Bochum, 44780 Bochum, Germany</mods:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institute of Soil Mechanics and Foundation Engineering, Ruhr‐University Bochum, 44780 Bochum</wicri:regionArea></affiliation></author><author><name sortKey="Triantafyllidis, Th" sort="Triantafyllidis, Th" uniqKey="Triantafyllidis T" first="Th." last="Triantafyllidis">Th. Triantafyllidis</name><affiliation wicri:level="1"><mods:affiliation>Institute of Soil Mechanics and Foundation Engineering, Ruhr‐University Bochum, 44780 Bochum, Germany</mods:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institute of Soil Mechanics and Foundation Engineering, Ruhr‐University Bochum, 44780 Bochum</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j">International Journal for Numerical and Analytical Methods in Geomechanics</title><title level="j" type="abbrev">Int. J. Numer. Anal. Meth. Geomech.</title><idno type="ISSN">0363-9061</idno><idno type="eISSN">1096-9853</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2004-11">2004-11</date><biblScope unit="volume">28</biblScope><biblScope unit="issue">13</biblScope><biblScope unit="page" from="1305">1305</biblScope><biblScope unit="page" to="1326">1326</biblScope></imprint><idno type="ISSN">0363-9061</idno></series><idno type="istex">25775935F7E225EB283E181EB16203B7C10283FB</idno><idno type="DOI">10.1002/nag.388</idno><idno type="ArticleID">NAG388</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0363-9061</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>diaphragm wall</term><term>numerical modelling</term><term>pore water pressure</term><term>soft clay</term><term>stress development</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The influence of a diaphragm wall construction on the stress field in a soft clayey soil is investigated by the use of a three‐dimensional FE‐model of seven adjacent wall panels. The installation procedure comprises the excavation and the subsequent pouring of each panel taking into account the increasing stiffness of the placed fresh concrete. The soft clay deposit is described by a visco‐hypoplastic constitutive model considering the rheological properties and the small‐strain stiffness of the soil. The construction process considerably affects the effective earth and pore water pressures adjacent to the wall. Due to concreting, a high excess pore water pressure arises, which dissipates during the following construction steps. The earth pressure finally shows an oscillating, distinct three‐dimensional distribution along the retaining wall which depends on the installation sequence of the panels and the difference between the fresh concrete pressure and the total horizontal earth pressure at rest. In comparison to FE‐calculations adopting the earth pressure at rest as initial condition, greater wall deflections and surface ground settlements during the subsequent pit excavation can be expected, as the average stress level especially in the upper half of the wall is increased by the construction procedure of the retaining structure. Copyright © 2004 John Wiley & Sons, Ltd.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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