Dépouillements

Interpretation by numerical modelling of changes of fracture system hydraulic conductivity induced by fluid injection / T. R. Harper in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 1–11 Titre : Interpretation by numerical modelling of changes of fracture system hydraulic conductivity induced by fluid injection Type de document : texte imprimé Auteurs : T. R. Harper, Auteur ; N. C. Last, Auteur Année de publication : 2007 Article en page(s) : pp. 1–11 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Fluid  Distinct  element  Injection  Stress  gradients  Conductivity  Fractures Résumé : Distinct element modelling of naturally fractured reservoirs is used to investigate changes of hydraulic conductivity induced by fluid injection. General conclusions are drawn relating to the effects of uniform changes of pore pressure on conductivity anisotropy in connected joint systems. The influence of cross-cutting discontinuous joints on the conductivity of the joints against which they terminate is emphasized. Results from a two dimensional model are related to the observed performance of a granitic geothermal reservoir. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/search?value1=%27fluid%27&option1=fulltext [article] Interpretation by numerical modelling of changes of fracture system hydraulic conductivity induced by fluid injection [texte imprimé] / T. R. Harper, Auteur ; N. C. Last, Auteur . - 2007 . - pp. 1–11. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 1–11 Mots-clés : Fluid  Distinct  element  Injection  Stress  gradients  Conductivity  Fractures Résumé : Distinct element modelling of naturally fractured reservoirs is used to investigate changes of hydraulic conductivity induced by fluid injection. General conclusions are drawn relating to the effects of uniform changes of pore pressure on conductivity anisotropy in connected joint systems. The influence of cross-cutting discontinuous joints on the conductivity of the joints against which they terminate is emphasized. Results from a two dimensional model are related to the observed performance of a granitic geothermal reservoir. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/search?value1=%27fluid%27&option1=fulltext

Numerical and centrifuge modelling of coupled heat flow and consolidation around hot cylinders buried in clay / A. M. Britto in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 13 –25 Titre : Numerical and centrifuge modelling of coupled heat flow and consolidation around hot cylinders buried in clay Type de document : texte imprimé Auteurs : A. M. Britto, Auteur ; C. Savvidou, Auteur ; D. V. Maddocks, Auteur Année de publication : 2007 Article en page(s) : pp. 13 –25 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Clays  Temperature  Finite  elements  Consolidation  Centrifuge  modelling Résumé : Britto (1984) presented a finite element formulation to analyse the coupled heat transfer–consolidation problem for a saturated fine-grained elastic soil. The formulation was validated by comparing it with analytical solutions for a soil layer heated on one side and a cylindrical heat source in an infinite medium. This Paper presents the results of the comparison of centrifuge test data and finite element analyses where the soil is treated as either purely elastic or elasto-plastic. In the centrifuge test, model heaters were pulled into clay layers and then heated. The induced temperature and pore pressure were measured until steady state conditions were reached. In the finite element analysis the model heaters were assumed to be in place at the beginning of the analysis. No account was taken of the disturbances caused by the heater being pulled into the soil. The temperatures and pore pressures generated due to the heating in normally consolidated clay were fairly well predicted using the modified Cam clay model of soil behaviour. Agreement was not as good when a Gibson type of elastic model was used. For an over-consolidated sample the pore pressures were under-predicted. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.13 [article] Numerical and centrifuge modelling of coupled heat flow and consolidation around hot cylinders buried in clay [texte imprimé] / A. M. Britto, Auteur ; C. Savvidou, Auteur ; D. V. Maddocks, Auteur . - 2007 . - pp. 13 –25. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 13 –25 Mots-clés : Clays  Temperature  Finite  elements  Consolidation  Centrifuge  modelling Résumé : Britto (1984) presented a finite element formulation to analyse the coupled heat transfer–consolidation problem for a saturated fine-grained elastic soil. The formulation was validated by comparing it with analytical solutions for a soil layer heated on one side and a cylindrical heat source in an infinite medium. This Paper presents the results of the comparison of centrifuge test data and finite element analyses where the soil is treated as either purely elastic or elasto-plastic. In the centrifuge test, model heaters were pulled into clay layers and then heated. The induced temperature and pore pressure were measured until steady state conditions were reached. In the finite element analysis the model heaters were assumed to be in place at the beginning of the analysis. No account was taken of the disturbances caused by the heater being pulled into the soil. The temperatures and pore pressures generated due to the heating in normally consolidated clay were fairly well predicted using the modified Cam clay model of soil behaviour. Agreement was not as good when a Gibson type of elastic model was used. For an over-consolidated sample the pore pressures were under-predicted. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.13

Three-dimensional analysis of locally loaded slopes / R. L. Michalowski in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 27 –38 Titre : Three-dimensional analysis of locally loaded slopes Type de document : texte imprimé Auteurs : R. L. Michalowski, Auteur Année de publication : 2007 Article en page(s) : pp. 27 –38 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Slopes  Bearing  capacity  Limit  state  analysis  Stability Résumé : A three-dimensional slope stability analysis for drained frictional-cohesive material based on the upper-bound technique of limit analysis is presented. A rigid-block toe or above-the-toe collapse mechanism is considered, with energy dissipation taking place along planar velocity discontinuities. The technique is appropriate for slope analysis when question arises as to the level of permissible loads on slopes where the load is confined to a limited area (local load). The results in terms of limit loads are compared with those available in the literature for a particular case of a frictionless material. It was found that, for a wide variety of parameters (especially for large safety margins), the present analysis yields lower values of limit loads. Since they are rigorous upper bounds to the true limit load, these results should be considered as closer to the actual limit load. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.27 [article] Three-dimensional analysis of locally loaded slopes [texte imprimé] / R. L. Michalowski, Auteur . - 2007 . - pp. 27 –38. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 27 –38 Mots-clés : Slopes  Bearing  capacity  Limit  state  analysis  Stability Résumé : A three-dimensional slope stability analysis for drained frictional-cohesive material based on the upper-bound technique of limit analysis is presented. A rigid-block toe or above-the-toe collapse mechanism is considered, with energy dissipation taking place along planar velocity discontinuities. The technique is appropriate for slope analysis when question arises as to the level of permissible loads on slopes where the load is confined to a limited area (local load). The results in terms of limit loads are compared with those available in the literature for a particular case of a frictionless material. It was found that, for a wide variety of parameters (especially for large safety margins), the present analysis yields lower values of limit loads. Since they are rigorous upper bounds to the true limit load, these results should be considered as closer to the actual limit load. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.27

Laterally loaded piles in a layered elastic medium / A. Verruijt in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 39 –46 Titre : Laterally loaded piles in a layered elastic medium Type de document : texte imprimé Auteurs : A. Verruijt, Auteur ; A. P. Kooijman, Auteur Année de publication : 2007 Article en page(s) : pp. 39 –46 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Piles  Soil–structure  interaction  Finite  elements  Elasticity Résumé : A numerical model for a laterally loaded pile in a horizontally layered elastic continuum is presented. Starting from the notion that horizontal displacements dominate the displacement field of the soil around the pile, a quasi-three-dimensional analysis is obtained. The use of a large mainframe computer is avoided by a substructuring technique, in which the soil is divided into interacting horizontal layers. For these layers, the finite element and finite difference method are combined with a relatively simple and compact method of analysis. The results of application of this method to some simple problems are compared with other numerical solutions. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.39 [article] Laterally loaded piles in a layered elastic medium [texte imprimé] / A. Verruijt, Auteur ; A. P. Kooijman, Auteur . - 2007 . - pp. 39 –46. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 39 –46 Mots-clés : Piles  Soil–structure  interaction  Finite  elements  Elasticity Résumé : A numerical model for a laterally loaded pile in a horizontally layered elastic continuum is presented. Starting from the notion that horizontal displacements dominate the displacement field of the soil around the pile, a quasi-three-dimensional analysis is obtained. The use of a large mainframe computer is avoided by a substructuring technique, in which the soil is divided into interacting horizontal layers. For these layers, the finite element and finite difference method are combined with a relatively simple and compact method of analysis. The results of application of this method to some simple problems are compared with other numerical solutions. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.39

Deterioration of a wall complex constructed of reinforced earth / G. E. Blight in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 47 –53 Titre : Deterioration of a wall complex constructed of reinforced earth Type de document : texte imprimé Auteurs : G. E. Blight, Auteur ; M. S. W. Dane, Auteur Année de publication : 2007 Article en page(s) : pp. 47 –53 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Case  history  Reinforced  soil  Retaining  walls  Deterioration  Field  tests Résumé : A gravity separation plant at a mine on the west coast of South Africa is flanked by a complex of reinforced earth walls having a maximum overall height of 41 m. Eighteen months after construction had been completed, it was discovered that the galvanized reinforcing strips were deteriorating as a result of galvanic corrosion caused by the aggressive nature of the backfill. The process of deterioration was monitored until the walls were demolished and rebuilt 8 years later. The progressive deterioration of the wall complex is described in terms of the reducing strength of the reinforcement and the continuing movement of the wall facings. The results of in-situ measurements of tensions in the reinforcing strips are also presented. The Paper gives an important insight into the process of corrosion affecting steel buried in soil, and also into the behaviour of large reinforced earth walls. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.47 [article] Deterioration of a wall complex constructed of reinforced earth [texte imprimé] / G. E. Blight, Auteur ; M. S. W. Dane, Auteur . - 2007 . - pp. 47 –53. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 47 –53 Mots-clés : Case  history  Reinforced  soil  Retaining  walls  Deterioration  Field  tests Résumé : A gravity separation plant at a mine on the west coast of South Africa is flanked by a complex of reinforced earth walls having a maximum overall height of 41 m. Eighteen months after construction had been completed, it was discovered that the galvanized reinforcing strips were deteriorating as a result of galvanic corrosion caused by the aggressive nature of the backfill. The process of deterioration was monitored until the walls were demolished and rebuilt 8 years later. The progressive deterioration of the wall complex is described in terms of the reducing strength of the reinforcement and the continuing movement of the wall facings. The results of in-situ measurements of tensions in the reinforcing strips are also presented. The Paper gives an important insight into the process of corrosion affecting steel buried in soil, and also into the behaviour of large reinforced earth walls. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.47

Long-term performance of an embedded cantilever retaining wall in stiff clay / D. R. Carder in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 55 –75 Titre : Long-term performance of an embedded cantilever retaining wall in stiff clay Type de document : texte imprimé Auteurs : D. R. Carder, Auteur ; I. F. Symons, Auteur Année de publication : 2007 Article en page(s) : pp. 55 –75 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Pore  pressures  Field  instrumentation  Field  tests  Limit  state  design/analysis  Earth  pressure  Diaphragm  walls Résumé : For embedded retaining walls in clay the critical design condition normally occurs in the long term when pore-water equilibrium has been achieved under the new stress regime near to the wall. This Paper presents the results of a field study of the long-term behaviour of a cantilever diaphragm wall in London clay constructed on the A329(M) near Reading, Berkshire. Lateral stresses acting on the wall were determined from push-in spade cells, from in situ tests using the Camkometer and the Marchetti dilatometer, and from laboratory measurements of soil capillary pressure. The measured stresses are compared with the limiting pressures obtained from assessments of wall stability based on measured strength properties and groundwater conditions. The factors of safety determined from these analyses are then compared with the design values currently recommended. The field data are also compared with finite element predictions of long term behaviour. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.55 [article] Long-term performance of an embedded cantilever retaining wall in stiff clay [texte imprimé] / D. R. Carder, Auteur ; I. F. Symons, Auteur . - 2007 . - pp. 55 –75. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 55 –75 Mots-clés : Pore  pressures  Field  instrumentation  Field  tests  Limit  state  design/analysis  Earth  pressure  Diaphragm  walls Résumé : For embedded retaining walls in clay the critical design condition normally occurs in the long term when pore-water equilibrium has been achieved under the new stress regime near to the wall. This Paper presents the results of a field study of the long-term behaviour of a cantilever diaphragm wall in London clay constructed on the A329(M) near Reading, Berkshire. Lateral stresses acting on the wall were determined from push-in spade cells, from in situ tests using the Camkometer and the Marchetti dilatometer, and from laboratory measurements of soil capillary pressure. The measured stresses are compared with the limiting pressures obtained from assessments of wall stability based on measured strength properties and groundwater conditions. The factors of safety determined from these analyses are then compared with the design values currently recommended. The field data are also compared with finite element predictions of long term behaviour. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.55

Numerical modelling of the trap door problem / N. C. Koutsabeloulis in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 77 –89 Titre : Numerical modelling of the trap door problem Type de document : texte imprimé Auteurs : N. C. Koutsabeloulis, Auteur ; D. V. Griffiths, Auteur Année de publication : 2007 Article en page(s) : pp. 77 –89 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Trap  door  problem  Tunnel  design  Finite  element  analysis  Anchor  design Résumé : The trap door problem is a useful model for providing a clearer understanding of the stress distribution around civil engineering structures such as anchor plates and tunnels. The passive mode can be used either to compute the uplift force of anchors or any buried structure which may be idealized as an anchor; the active mode can be used to compute the gravitational flow of a granular material between vertical walls or the soil reaction curve for tunnel design. Both modes of displacement are modelled numerically in this Paper using the finite element method. The results are presented in the form of influence charts, which may be used for both the passive and active modes to provide failure loads for a range of geometries and soil properties, using non-dimensionalized parameters. The use of these equations is compared with results obtained from other sources using both physical and numerical models. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.77 [article] Numerical modelling of the trap door problem [texte imprimé] / N. C. Koutsabeloulis, Auteur ; D. V. Griffiths, Auteur . - 2007 . - pp. 77 –89. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 77 –89 Mots-clés : Trap  door  problem  Tunnel  design  Finite  element  analysis  Anchor  design Résumé : The trap door problem is a useful model for providing a clearer understanding of the stress distribution around civil engineering structures such as anchor plates and tunnels. The passive mode can be used either to compute the uplift force of anchors or any buried structure which may be idealized as an anchor; the active mode can be used to compute the gravitational flow of a granular material between vertical walls or the soil reaction curve for tunnel design. Both modes of displacement are modelled numerically in this Paper using the finite element method. The results are presented in the form of influence charts, which may be used for both the passive and active modes to provide failure loads for a range of geometries and soil properties, using non-dimensionalized parameters. The use of these equations is compared with results obtained from other sources using both physical and numerical models. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.77

Dynamic centrifuge model tests on clay embankments / B. L. Kutter in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 91 –106 Titre : Dynamic centrifuge model tests on clay embankments Type de document : texte imprimé Auteurs : B. L. Kutter, Auteur ; R. G. James, Auteur Année de publication : 2007 Article en page(s) : pp. 91 –106 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Stability  Centrifuge  modelling  Slopes  Clays  Earthquakes  Deformation Résumé : Centrifuge modelling is a valuable means for obtaining data to study the response of geotech-nical structures to infrequent or extreme events such as earthquakes. The results of a study of five clay embankments subjected to 23 simulated earthquakes on the Cambridge geotechnical centrifuge are presented and analysed. The influence of earthquake intensity on dynamic magnification, the existence of a yield acceleration, and a delayed failure were observed in this test series. Deformation patterns observed by X-ray radiography are presented. The stress history and soil shear strength data for the models are presented to enable other researchers to test their ability to predict the observed embankment response. The mechanisms of deformation and failure of the embankments are observed and discussed. Well-documented data of this type are not available from natural earthquakes, since large earthquakes are infrequent and unrepeatable, and it is difficult to predict where they will strike. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.91 [article] Dynamic centrifuge model tests on clay embankments [texte imprimé] / B. L. Kutter, Auteur ; R. G. James, Auteur . - 2007 . - pp. 91 –106. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 91 –106 Mots-clés : Stability  Centrifuge  modelling  Slopes  Clays  Earthquakes  Deformation Résumé : Centrifuge modelling is a valuable means for obtaining data to study the response of geotech-nical structures to infrequent or extreme events such as earthquakes. The results of a study of five clay embankments subjected to 23 simulated earthquakes on the Cambridge geotechnical centrifuge are presented and analysed. The influence of earthquake intensity on dynamic magnification, the existence of a yield acceleration, and a delayed failure were observed in this test series. Deformation patterns observed by X-ray radiography are presented. The stress history and soil shear strength data for the models are presented to enable other researchers to test their ability to predict the observed embankment response. The mechanisms of deformation and failure of the embankments are observed and discussed. Well-documented data of this type are not available from natural earthquakes, since large earthquakes are infrequent and unrepeatable, and it is difficult to predict where they will strike. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.91

A new analsis procedure to explain a slope failure at the Martin Lake mine / T. W. Miller in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 107 –123 Titre : A new analsis procedure to explain a slope failure at the Martin Lake mine Type de document : texte imprimé Auteurs : T. W. Miller, Auteur ; J. M. Hamilton, Auteur Année de publication : 2007 Article en page(s) : pp. 107 –123 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Case  history  Design/analysis  Stability  Failure  Plasticity  Analysis  Limit  state Résumé : A general failure mechanism, which is incorporated in an upper-bound analysis procedure and involves both continuous deformation and rigid-body rotation, has been developed. Analyses with this mechanism result in improved predictions for the design of slopes whose stability is affected by moderately high water pressures. In such cases, use of conventional analysis procedures may some-times lead to unsafe conditions. The mechanism was developed to explain a welldocumented slope failure at an operating lignite mine in north-east Texas. Analyses with the improved mechanism indicate that the slope was marginally stable, with a safety factor of 1·04, when it was being surveyed two days before it failed. Only a small increase in the water pressures, as indicated by a 0·5 m increase in the height of the water table near the slope face, was required for the safety factor to drop to 1·0. In contrast, both a conventional upper-bound analysis incorporating a rigid-body failure mechanism and a limiting-equilibrium analysis based on Spencer's method predict that the slope would be stable with a safety factor of 1·28 for the latter water pressure conditions. Comparisons of results with published solutions also indicate that the new mechanism can result in improved predictions of slope stability. The most significant improvement occurred in the analysis of the slide at Lodalen, where a stability analysis which used Bishop's method resulted in a safety factor of 1·05. In contrast, the new method produced a safety factor of 0·95. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.107 [article] A new analsis procedure to explain a slope failure at the Martin Lake mine [texte imprimé] / T. W. Miller, Auteur ; J. M. Hamilton, Auteur . - 2007 . - pp. 107 –123. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 107 –123 Mots-clés : Case  history  Design/analysis  Stability  Failure  Plasticity  Analysis  Limit  state Résumé : A general failure mechanism, which is incorporated in an upper-bound analysis procedure and involves both continuous deformation and rigid-body rotation, has been developed. Analyses with this mechanism result in improved predictions for the design of slopes whose stability is affected by moderately high water pressures. In such cases, use of conventional analysis procedures may some-times lead to unsafe conditions. The mechanism was developed to explain a welldocumented slope failure at an operating lignite mine in north-east Texas. Analyses with the improved mechanism indicate that the slope was marginally stable, with a safety factor of 1·04, when it was being surveyed two days before it failed. Only a small increase in the water pressures, as indicated by a 0·5 m increase in the height of the water table near the slope face, was required for the safety factor to drop to 1·0. In contrast, both a conventional upper-bound analysis incorporating a rigid-body failure mechanism and a limiting-equilibrium analysis based on Spencer's method predict that the slope would be stable with a safety factor of 1·28 for the latter water pressure conditions. Comparisons of results with published solutions also indicate that the new mechanism can result in improved predictions of slope stability. The most significant improvement occurred in the analysis of the slide at Lodalen, where a stability analysis which used Bishop's method resulted in a safety factor of 1·05. In contrast, the new method produced a safety factor of 0·95. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.107

Deformations caused by surface loading and tunnelling / K. M. Lee in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 125–140 Titre : Deformations caused by surface loading and tunnelling : The role of elastic anisotropy Type de document : texte imprimé Auteurs : K. M. Lee, Auteur ; R. K. Rowe, Auteur Année de publication : 2007 Article en page(s) : pp. 125–140 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Centrifuge  modelling  Footings/foundations  Flnite  elements  Settlement  Anisotropy  Tunnels Résumé : Elastoplastic finite element analyses were performed to determine the effects of elastic anisotropy on surface settlements caused by a uniform surface loading and by tunnelling. For typical ranges of elastic cross-anisotropic parameters, the effect of anisotropy on settlement induced by surface loading is modest; however, for the case of tunnelling, the effect of elastic anisotropy, in particular the ratio of the independent shear modulus G vh, to vertical modulus E v, should be considered if reasonable predictions of settlement are to be obtained. The practical implications of these find- ings are shown by considering the centrifugal model tunnel tests conducted at Cambridge University. It is found that the anisotropy has a significant effect on the shape of the settlement trough and that reasonable agreement between observa-tion and theory is obtained for G vh/E v, of between 0·2 and O·25, which is smaller thanthe isotropic value of G vh/E v, = 0·33 (for the undrained condition). The reasons for this are discussed. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.125 [article] Deformations caused by surface loading and tunnelling : The role of elastic anisotropy [texte imprimé] / K. M. Lee, Auteur ; R. K. Rowe, Auteur . - 2007 . - pp. 125–140. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 125–140 Mots-clés : Centrifuge  modelling  Footings/foundations  Flnite  elements  Settlement  Anisotropy  Tunnels Résumé : Elastoplastic finite element analyses were performed to determine the effects of elastic anisotropy on surface settlements caused by a uniform surface loading and by tunnelling. For typical ranges of elastic cross-anisotropic parameters, the effect of anisotropy on settlement induced by surface loading is modest; however, for the case of tunnelling, the effect of elastic anisotropy, in particular the ratio of the independent shear modulus G vh, to vertical modulus E v, should be considered if reasonable predictions of settlement are to be obtained. The practical implications of these find- ings are shown by considering the centrifugal model tunnel tests conducted at Cambridge University. It is found that the anisotropy has a significant effect on the shape of the settlement trough and that reasonable agreement between observa-tion and theory is obtained for G vh/E v, of between 0·2 and O·25, which is smaller thanthe isotropic value of G vh/E v, = 0·33 (for the undrained condition). The reasons for this are discussed. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.125

Permeability measurement of clay pastes by a non-linear analysis of transient seepage consolidation tests / J. R. Feldkamp in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 141–145 Titre : Permeability measurement of clay pastes by a non-linear analysis of transient seepage consolidation tests Type de document : texte imprimé Auteurs : J. R. Feldkamp, Auteur Année de publication : 2007 Article en page(s) : pp. 141–145 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Clays  Compressibility  Constitutive  relations  Consolidation  Permeability Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.141 [article] Permeability measurement of clay pastes by a non-linear analysis of transient seepage consolidation tests [texte imprimé] / J. R. Feldkamp, Auteur . - 2007 . - pp. 141–145. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 141–145 Mots-clés : Clays  Compressibility  Constitutive  relations  Consolidation  Permeability Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.141

A rigid rectangular footing on an elastic layer / J. P. Dempsey in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 147–152 Titre : A rigid rectangular footing on an elastic layer Type de document : texte imprimé Auteurs : J. P. Dempsey, Auteur ; H. Li, Auteur Année de publication : 2007 Article en page(s) : pp. 147–152 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Settlement  Stress  analysis  Elasticity  Soil–structure  interaction  Interaction  Bearing  capacity  Footings/foundations Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.147 [article] A rigid rectangular footing on an elastic layer [texte imprimé] / J. P. Dempsey, Auteur ; H. Li, Auteur . - 2007 . - pp. 147–152. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 147–152 Mots-clés : Settlement  Stress  analysis  Elasticity  Soil–structure  interaction  Interaction  Bearing  capacity  Footings/foundations Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.147

Viscous effects observed in tests on an anisotropically normally consolidated silty clay / M. P. O'Reilly in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 153 –158 Titre : Viscous effects observed in tests on an anisotropically normally consolidated silty clay Type de document : texte imprimé Auteurs : M. P. O'Reilly, Auteur ; S. F. Brown, Auteur ; R. F. Overy, Auteur Année de publication : 2007 Article en page(s) : pp. 153 –158 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Time  dependence  Repeated  loading  Shear  tests  Clays  Strains  Triaxial  tests Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.153 [article] Viscous effects observed in tests on an anisotropically normally consolidated silty clay [texte imprimé] / M. P. O'Reilly, Auteur ; S. F. Brown, Auteur ; R. F. Overy, Auteur . - 2007 . - pp. 153 –158. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 153 –158 Mots-clés : Time  dependence  Repeated  loading  Shear  tests  Clays  Strains  Triaxial  tests Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.153

Change in pore size distribution due to consolidation of clays / F. J. Griffiths in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 159 –167 Titre : Change in pore size distribution due to consolidation of clays Type de document : texte imprimé Auteurs : F. J. Griffiths, Auteur ; R. C. Joshi, Auteur Année de publication : 2007 Article en page(s) : pp. 159 –167 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Consolidation  Clays  Compressibility  Research  Fabric/structures  of  soils Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.159 [article] Change in pore size distribution due to consolidation of clays [texte imprimé] / F. J. Griffiths, Auteur ; R. C. Joshi, Auteur . - 2007 . - pp. 159 –167. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 159 –167 Mots-clés : Consolidation  Clays  Compressibility  Research  Fabric/structures  of  soils Note de contenu : Technical Note ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.159

On two definitions of excess pore water pressure / Gibson, R. E. in Géotechnique, Vol. 39 N°1 (Mars 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 169–171 Titre : On two definitions of excess pore water pressure Type de document : texte imprimé Auteurs : Gibson, R. E., Auteur ; R. L. Schiffman, Auteur ; R. V. Whitman, Auteur Année de publication : 2007 Article en page(s) : pp. 169–171 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Groundwater  Pore  pressure  Water  flow ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.169 [article] On two definitions of excess pore water pressure [texte imprimé] / Gibson, R. E., Auteur ; R. L. Schiffman, Auteur ; R. V. Whitman, Auteur . - 2007 . - pp. 169–171. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°1 (Mars 1989) . - pp. 169–171 Mots-clés : Groundwater  Pore  pressure  Water  flow ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.1.169

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