Pub Date : 2001-01-01DOI: 10.1680/GENG.2001.149.1.49
G. Dawson, J. Gilman
Early approaches to land reclamation involved bulk removal of contaminated media using traditional geotechnical engineering technologies such as soil excavation and groundwater extraction. While th...
{"title":"Land reclamation technology—expanding the geotechnical engineering envelope","authors":"G. Dawson, J. Gilman","doi":"10.1680/GENG.2001.149.1.49","DOIUrl":"https://doi.org/10.1680/GENG.2001.149.1.49","url":null,"abstract":"Early approaches to land reclamation involved bulk removal of contaminated media using traditional geotechnical engineering technologies such as soil excavation and groundwater extraction. While th...","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1680/GENG.2001.149.1.49","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67401503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-01-01DOI: 10.1680/GENG.2001.149.1.29
E. Hellawell, J. Hawley, A. Pooley, S. Eskesen, B. Garrod, M. Leggett
Many cities are tackling their urban congestion problems by utilising underground space and developing or expanding underground railways or metros. This paper presents metro projects currently bein...
{"title":"Metros under construction around the world","authors":"E. Hellawell, J. Hawley, A. Pooley, S. Eskesen, B. Garrod, M. Leggett","doi":"10.1680/GENG.2001.149.1.29","DOIUrl":"https://doi.org/10.1680/GENG.2001.149.1.29","url":null,"abstract":"Many cities are tackling their urban congestion problems by utilising underground space and developing or expanding underground railways or metros. This paper presents metro projects currently bein...","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1680/GENG.2001.149.1.29","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67401452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2001-01-01DOI: 10.1680/GENG.2001.149.1.41
P. Cundall
Finite-element or finite-difference methods are commonly used in geomechanics to model the response of soil or rock at an engineering site. These methods assume that the material is a continuum (although known discontinuities can be included explicitly). There are two drawbacks with continuum methods. Firstly, an appropriate stress-strain law for the material may not exist, or the law may be excessively complicated with many obscure parameters. Secondly, the natural development of cracks and rupture surfaces is not well-handled by continuum approaches. It is suggested that the future trend for numerical modelling in soil and rock may consist of the replacement of continuum methods by particle methods. Assemblies of discrete particles (bonded together to represent rock, and unbonded to represent soil) capture the complicated behaviour of actual material with simple assumptions and few parameters at the micro level. Complex overall behaviour arises as an emergent property of the assembly. The application of...
{"title":"A DISCONTINUOUS FUTURE FOR NUMERICAL MODELLING IN GEOMECHANICS","authors":"P. Cundall","doi":"10.1680/GENG.2001.149.1.41","DOIUrl":"https://doi.org/10.1680/GENG.2001.149.1.41","url":null,"abstract":"Finite-element or finite-difference methods are commonly used in geomechanics to model the response of soil or rock at an engineering site. These methods assume that the material is a continuum (although known discontinuities can be included explicitly). There are two drawbacks with continuum methods. Firstly, an appropriate stress-strain law for the material may not exist, or the law may be excessively complicated with many obscure parameters. Secondly, the natural development of cracks and rupture surfaces is not well-handled by continuum approaches. It is suggested that the future trend for numerical modelling in soil and rock may consist of the replacement of continuum methods by particle methods. Assemblies of discrete particles (bonded together to represent rock, and unbonded to represent soil) capture the complicated behaviour of actual material with simple assumptions and few parameters at the micro level. Complex overall behaviour arises as an emergent property of the assembly. The application of...","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2001-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1680/GENG.2001.149.1.41","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67401465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-04-01DOI: 10.1680/GENG.2000.143.2.65
J. Sieffert, C. Bay-Gress
The aim of this paper is to compare the methods used by the European countries to evaluate the bearing capacity of shallow foundations. Comparisons of several formulations of bearing capacity factors, depth and shape factors, load inclination and eccentricity factors, as well as values of these factors, are presented. This study has deliberately been restricted to methods using the bearing capacity factors Nc, Nq and Nγ: other methods exist and are used, but few of them are in common use in all European countries (for example, the pressiometric method is used almost exclusively in France), and consequently the comparison would be awkward. The most important conclusion is that the evaluated bearing capacity depends highly on the country. Therefore, bearing capacity needs to be better understood using new parametric and numerical analyses.
{"title":"COMPARISON OF EUROPEAN BEARING CAPACITY CALCULATION METHODS FOR SHALLOW FOUNDATIONS","authors":"J. Sieffert, C. Bay-Gress","doi":"10.1680/GENG.2000.143.2.65","DOIUrl":"https://doi.org/10.1680/GENG.2000.143.2.65","url":null,"abstract":"The aim of this paper is to compare the methods used by the European countries to evaluate the bearing capacity of shallow foundations. Comparisons of several formulations of bearing capacity factors, depth and shape factors, load inclination and eccentricity factors, as well as values of these factors, are presented. This study has deliberately been restricted to methods using the bearing capacity factors Nc, Nq and Nγ: other methods exist and are used, but few of them are in common use in all European countries (for example, the pressiometric method is used almost exclusively in France), and consequently the comparison would be awkward. The most important conclusion is that the evaluated bearing capacity depends highly on the country. Therefore, bearing capacity needs to be better understood using new parametric and numerical analyses.","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2000-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1680/GENG.2000.143.2.65","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67401371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The past decade has seen a considerable improvement in the understanding of the causes of tube sampling disturbance, as a result both of comparative studies of the performance of different sampling methods, and the development of new analytical techniques. This has built on the pioneering work carried out in the 1930s and 1940s, reviewed and inter- preted in the seminal works of Hvorslev. Much of this knowledge, both old and new, has yet to be used widely in engineering practice, both in the UK and elsewhere. This paper reviews some of the major issues which must be addressed if samples of acceptable quality are to be obtained for laboratory soil testing, and draws on both old and new sources.
{"title":"Tube sampling disturbance—forgotten truths and new perspectives","authors":"C. Clayton, A. Siddique","doi":"10.1680/GT.1999.370302","DOIUrl":"https://doi.org/10.1680/GT.1999.370302","url":null,"abstract":"The past decade has seen a considerable improvement in the understanding of the causes of tube sampling disturbance, as a result both of comparative studies of the performance of different sampling methods, and the development of new analytical techniques. This has built on the pioneering work carried out in the 1930s and 1940s, reviewed and inter- preted in the seminal works of Hvorslev. Much of this knowledge, both old and new, has yet to be used widely in engineering practice, both in the UK and elsewhere. This paper reviews some of the major issues which must be addressed if samples of acceptable quality are to be obtained for laboratory soil testing, and draws on both old and new sources.","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1680/GT.1999.370302","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67465540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1983-06-01DOI: 10.1016/0148-9062(86)90227-5
M. Wallays
{"title":"DEEP COMPACTION BY VERTICAL AND HORIZONTAL VIBRATION","authors":"M. Wallays","doi":"10.1016/0148-9062(86)90227-5","DOIUrl":"https://doi.org/10.1016/0148-9062(86)90227-5","url":null,"abstract":"","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"1983-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0148-9062(86)90227-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53995070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-05-09DOI: 10.1016/0148-9062(85)92234-x
B. Mcclelland, A. Young, B. Remmes
{"title":"Avoiding jack-up rig foundation failures","authors":"B. Mcclelland, A. Young, B. Remmes","doi":"10.1016/0148-9062(85)92234-x","DOIUrl":"https://doi.org/10.1016/0148-9062(85)92234-x","url":null,"abstract":"","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"1982-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0148-9062(85)92234-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"53994227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1680/GENG.156.1.17.37291
B. Lehane
This paper presents the results from a field experiment involving the vertical loading to ultimate failure of a shallow pad footing founded on a soft estuarine clayey silt. Data from settlement plates and pneumatic piezometers located beneath the footing are used, in conjunction with estimated stress distributions, to compare the ground's stiffness characteristics with those measured in laboratory tests. The operational undrained shear strength of the clayey silt, inferred from the ultimate vertical load of the foundation, is also compared with in situ and laboratory estimates of undrained shear strength and with operational strengths estimated from a similar footing test. The paper presents the results from a prediction competition held for the footing experiment with a view to assisting assessment of the reliability of standard design prediction procedures.
{"title":"Vertically loaded shallow foundation on soft clayey silt","authors":"B. Lehane","doi":"10.1680/GENG.156.1.17.37291","DOIUrl":"https://doi.org/10.1680/GENG.156.1.17.37291","url":null,"abstract":"This paper presents the results from a field experiment involving the vertical loading to ultimate failure of a shallow pad footing founded on a soft estuarine clayey silt. Data from settlement plates and pneumatic piezometers located beneath the footing are used, in conjunction with estimated stress distributions, to compare the ground's stiffness characteristics with those measured in laboratory tests. The operational undrained shear strength of the clayey silt, inferred from the ultimate vertical load of the foundation, is also compared with in situ and laboratory estimates of undrained shear strength and with operational strengths estimated from a similar footing test. The paper presents the results from a prediction competition held for the footing experiment with a view to assisting assessment of the reliability of standard design prediction procedures.","PeriodicalId":45150,"journal":{"name":"Geotechnical Engineering","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67400988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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