Face stability
Probabilistic analysis of the face stability of circular tunnels
... the face stability of a shallow circular tunnel driven by a pressurized ...tunnel face against collapse, with respect to the hypothesis of uncorrelated variables, (ii) the failure probability is much ...
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Face stability analysis of circular tunnels driven by a pressurized shield
... the stability of a tunnel face is governed by the so-called load factor N defined as N = 共 s + ␥H− t 兲/c u where s ⫽surcharge loading on the ground surface; t ⫽uniform pressure applied on the tunnel ...
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Kinematical approach to the face stability analysis of shallow circular tunnels
... THE FACE STABILITY ANALYSIS: The problem can be idealized, as shown in figure 1, by considering a circular rigid tunnel of diameter D driven under a depth of cover ...
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Three-dimensional face stability analysis of circular tunnels by numerical simulations
... The face stability analysis of shallow circular tunnels driven by the pressurized shield is investigated by three-dimensional numerical ...tunnel face are considered in the ...tunnel face, ...
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Influence of the scale of fluctuation of the friction angle on the face stability of a pressurized tunnel in sands
... INTRODUCTION The estimation of the fluid pressure that has to be applied to a tunnel face to maintain its stability is of major interest in real tunnelling projects. This paper aims at investigating the ...
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Probabilistic Analysis and Design of Circular Tunnels against Face Stability
... shield. Face stability analysis of shallow circular tunnels driven by the pressurized shield is of major im- ...tunnel face pressure must avoid both the collapse 共active failure兲 and the blow-out ...
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Probabilistic analysis of pressurized tunnels against face stability using collocation-based stochastic response surface method
... Abstract: A probabilistic analysis of the face stability of a tunnel driven by a compressed-air pressurized shield is presented. The collo- cation-based stochastic response surface methodology (CSRSM) is ...
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A new 2D failure mechanism for face stability analysis of a pressurized tunnel in spatially variable sand
... INTRODUCTION Stability is a key design/construction consideration in real shield tunnelling ...of stability analysis is to ensure safety against soil collapse in front of the tunnel ...tunnel face. ...
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Rotational failure mechanisms for the face stability analysis of tunnels driven by a pressurized shield
... 2. VELOCITY FIELD This section is devoted to the presentation of (i) the velocity field, (ii) the geometrical construction of the 3D failure surface and finally (iii) the work equation. The study considers a circular ...
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Extension of CSRSM for the parametric study of the face stability of pressurized tunnels
... Characteristics of a soft clay are chosen because this kind of soil is likely to allow face instabilities. For this reference case, the coefficients of the PCEs of orders 2 to 5 are determined using the process ...
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Three essays on financial stability
... More skeptical views about the merits of STTs are advanced in Schwert and Seguin ( 1993 ), Kupiec ( 1996 ), Amihud and Mendelson ( 2003 ) and Song and Zhang ( 2005 ), among others. These authors remark that an STT ...
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Stability of Curvature Measures
... [29, 20] for a definition), which implies that the associated curvature measures are also O ( √ ǫ) close. We think of several possible future directions. First we think of extend- ing our paradigm to the measure of ...
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Dispersal and metapopulation stability
... CONCLUDING REMARKS In this paper, we have explored how spatial processes govern the variability of metapopulations at multiple scales in a stochastic environment. We show that within a metapopulation, dispersal functions ...
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Delaunay stability via perturbations
... The stability issue with geometric structures also arises in the context of robust computation, where a high precision may be demanded to resolve near degenerate ...
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Analyse prosodique des affects sociaux dans l'interaction face à face en japonais
... Cependant, comme mentionné précédemment, il y a une interaction significative attitude × position moraïque sur la durée (F (30,510)=12.07, p<.05) qui montre que pour différentes attit[r] ...
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Slope stability studies, 1963
... (6) Stability Analysis of Selected Slopes Using Method of Slices The slopes which were selected for more intensive study departed considerably from the straight line slope assumed in Bis[r] ...
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Affect reflection technology in face-to-face service encounters
... A future application might provide real-time feedback (e.g., Kim et al., 2008) about affective information during a service interaction. With regard to data analysis, other me[r] ...
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La théorie du millefeuille. De la non-substitution entre communications électroniques et face à face
... réunions face à face, mais au contraire conduire à leur ...réunions face à ...communication face à face et le recours aux réunions n’est pas réduit pour ...
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pile face enonce
... c. La touche « R » déclenche 20 000 tirages de « Pile ou face ». Tous les 100 tirages, le pourcentage de piles calculé sur l’ensemble des tirages est ajouté dans le tableau « Pourcentage de piles ». ● Appuyer sur ...
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DES INFIRMIERES FACE AU SIDA
... "C'est vrai que j'ai toujours l'impression dans le service de voir une population ciblée, très ciblée justement, d'homosexuels, de toxicomanes, très peu de gens, d'hétérosexuels qui ont… qui ont attrapé ça par… ...
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