Three-dimensional modelling of a diaphragm wall construction sequence

Ng, Charles Wang Wai; Yan, W. M.

doi:10.1680/geot.1999.49.6.825

Cited by 55 publications

(26 citation statements)

References 4 publications

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“…Actuellement, il est envisa geable de modéliser le processus de réalisation d'une paroi moulée dans des temps de calcul raisonnables (Gourvennec et Powrie, 1999 ;Ng et Yan, 1999 ;Frih, 2005 ;Schäfer et Triantafyllidis, 2004 ;Schäfer et Triantafyllidis, 2006a et b). Ce type de calculs revient en fait à modifier l'état de contraintes autour du soutènement et à définir une nouvelle contrainte horizontale qui va influer sur la cinématique de l'excavation.…”

Section: éTat De L'artunclassified

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Modélisation numérique des mouvements de sol induits par des excavations

Burlon¹,

Mroueh

2012

Rev. Fr. Geotech.

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Numerical modeling of soil movements induced by deep excavations AbstractNumerical modeling of ground movements induced by excavations supported is a complex topic for which different parameters may have a significant influence on the final result, Firstly, this paper deals with the influence of the initial stress state with a numerical model of the installation steps of several diaphragm wall panels. Different calculations in two and three dimensions taking into or not these steps are carried out to highlight the effects of the initial stress state on deformation mechanisms induced by the excavation. Previously, a detailed study of ground motion generated during the execution of the walls is performed to identify changes in horizontal stress behind the retaining wall. Then, a study on the effects of nonlinearities in the elastic constitutive equations including a failure criterion M ohr-Coulomb type is performed. It identifies the links between elastic parameters of the constitutive laws and the calculated movements during an excavation.

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Section: éTat De L'artunclassified

“…Cette donnée varie suivant les auteurs mais restent généralement comprise entre 10,1 kN/m3 (Ng et Yan, 1999) et 12 kN/m3 (Gourvennet et Powrie, 1999). Pour cette étude, une valeur de 11 kN/m3 est retenue.…”

Section: Modélisations De Type Wimunclassified

Modélisation numérique des mouvements de sol induits par des excavations

Burlon¹,

Mroueh

2012

Rev. Fr. Geotech.

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“…Das resultierende Spannungsbild unterscheidet sich dabei grundsätzlich von jenem, welches für überkonsolidierte Böden bislang meß-technisch und numerisch erfaßt werden konnte [9], [19], [24], [25] …”

Section: Schlitzwandsegement 51 Erweitertes Fe-modellunclassified

“…Die Berechnungsergebnisse wurden im folgenden durch die Modellierung der sequentiellen Herstellung durchlaufender Schlitzwandsegmente in über-konsolidierten Tonsedimenten ergänzt werden [9], [19]. In den untersuchten Fällen ergibt sich nach Fertigstellung des Schlitzwandausschnitts eine ungleichförmige Spannungsverteilung im angrenzenden Boden mit Spannungsminima in der Mitte und Spannungsmaxima an den Über-gängen der Lamellen.…”

Section: Introductionunclassified

Spannungs- und Porenwasserdruckentwicklung infolge Schlitzwand-Herstellung in weichen bindigen Böden

Schäfer¹,

Triantafyllidis

2006

Bautechnik

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“…The safety factor is an important index in the design of slurry trench. Theoretical analysis, numerical analysis and experiments have been undertaken to investigate slurry trench stability Tsai and Chang, 1996;Ng and Yan, 1998;1999;Tsai et al, 1998;2000). Tsai (1997) presented an analytical method to evaluate the stability of weak sublayers against lateral extrusion in a slurry supported trench.…”

Section: Introductionmentioning

confidence: 99%

2D and 3D stability analysis of slurry trench in frictional/cohesive soil

Han

Chen

Wang

et al. 2013

J. Zhejiang Univ. Sci. A

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A 2D and 3D kinematically admissible rotational failure mechanism is presented for homogeneous slurry trenches in frictional/cohesive soils. Analytical approaches are derived to obtain the upper bounds on slurry trench stability in the strict framework of limit analysis. It is shown that the factor of safety from a 3D analysis will be greater than that from a 2D analysis. Compared with the limit equilibrium method, the limit analysis method yields an unconservative estimate on the safety factors. A set of examples are presented in a wide range of parameters for 2D and 3D homogeneous slurry trenches. The factor of safety increases with increasing slurry and soil bulk density ratio, cohesion, friction angle, and with decreasing slurry level depth and trench depth ratio, trench width and depth ratio. It is convenient to assess the safety for the homogeneous slurry trenches in practical applications.

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Three-dimensional modelling of a diaphragm wall construction sequence

Cited by 55 publications

References 4 publications

Modélisation numérique des mouvements de sol induits par des excavations

Modélisation numérique des mouvements de sol induits par des excavations

Spannungs- und Porenwasserdruckentwicklung infolge Schlitzwand-Herstellung in weichen bindigen Böden

2D and 3D stability analysis of slurry trench in frictional/cohesive soil

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