{"title":"Stress wave velocity in soils: Apparent grain-size effect and optimum input frequencies","authors":"T. Dutta, M. Otsubo, R. Kuwano, C. O’Sullivan","doi":"10.1680/JGELE.18.00219","DOIUrl":"https://doi.org/10.1680/JGELE.18.00219","url":null,"abstract":"There is a lack of consensus in the literature on the influence of the median particle size on stress wave velocity in cohesionless soils. For assemblies of spherical particles with Hertzian contac...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"39 2 1","pages":"340-347"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88620849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Grain morphology and strength dilatancy of sands","authors":"G. Guida, D. Sebastiani, F. Casini, S. Miliziano","doi":"10.1680/JGELE.18.00199","DOIUrl":"https://doi.org/10.1680/JGELE.18.00199","url":null,"abstract":"The presented experimental study, from micro to macro scale, assesses the effects of grain shape on the strength-dilatancy behaviour and physical properties of seven natural sands of different orig...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"58 1","pages":"245-253"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76146458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of granular collisions on the rapid coarse-grained materials flow","authors":"F. Federico, C. Cesali","doi":"10.1680/JGELE.18.00223","DOIUrl":"https://doi.org/10.1680/JGELE.18.00223","url":null,"abstract":"A continuum model to predict the mobility of landslides is developed according to the formulation by Savage and Hutter as well as the main ‘microscopic aspects’ affecting the rapid sliding of granu...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"27 1","pages":"278-283"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83489544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of micro- to meso-features on the permeability of fissured clays","authors":"C. Vitone, S. Guglielmi, G. Pedone, F. Cotecchia","doi":"10.1680/jgele.18.00237","DOIUrl":"https://doi.org/10.1680/jgele.18.00237","url":null,"abstract":"This paper discusses the relation of the coefficient of saturated permeability in a given direction, ki, with the void ratio, e, for fissured and unfissured clays, wherein ki characterises the hydr...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"1 1","pages":"369-376"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88681798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Exploring the effect of 3D grain shape on the packing and mechanical behaviour of sands","authors":"Hao Yang, Bo Zhou, Jianfeng Wang","doi":"10.1680/JGELE.18.00227","DOIUrl":"https://doi.org/10.1680/JGELE.18.00227","url":null,"abstract":"This paper investigated the dependence of three-dimensional grain shape characteristics on particle size by applying X-ray micro-computerized tomography. A series of packing and triaxial shearing e...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"15 1","pages":"299-304"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90083888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Doreau-Malioche, A. Galvis-Castro, R. Tovar-Valencia, G. Viggiani, G. Combe, M. Prezzi, R. Salgado
{"title":"Characterising processes at sand-pile interface using digital image analysis and X-ray CT","authors":"J. Doreau-Malioche, A. Galvis-Castro, R. Tovar-Valencia, G. Viggiani, G. Combe, M. Prezzi, R. Salgado","doi":"10.1680/JGELE.18.00232","DOIUrl":"https://doi.org/10.1680/JGELE.18.00232","url":null,"abstract":"This paper presents the results of a tensile and a compressive load tests on an instrumented model pile pre-installed in medium–dense sand samples prepared in a half-circular calibration chamber wi...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"28 1","pages":"254-262"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77019113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Wetting test and X-ray computed tomography of volcanic unsaturated sands","authors":"M. Moscariello, S. Cuomo","doi":"10.1680/JGELE.18.00200","DOIUrl":"https://doi.org/10.1680/JGELE.18.00200","url":null,"abstract":"Wetting can induce the so-called ‘capillary collapse’ in loose unsaturated soils. Collapse mechanisms have been studied at macro-scale for many years, while few observations at micro-scale are avai...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"1 1","pages":"314-321"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76830070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A novel multiscale neutron-diffraction-based experimental approach for granular media","authors":"S. Athanasopoulos, S. Hall, J. Kelleher","doi":"10.1680/JGELE.18.00234","DOIUrl":"https://doi.org/10.1680/JGELE.18.00234","url":null,"abstract":"The complexity of granular (geo-)materials is associated with the mobility and interaction of their constituent particles. Under the effect of loading, these materials exhibit a highly inhomogeneou...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"76 1","pages":"284-289"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80365952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of pore fluid and wet-dry cycles on structure and hydraulic conductivity of clay","authors":"T. Thyagaraj, M. Julina","doi":"10.1680/JGELE.19.00046","DOIUrl":"https://doi.org/10.1680/JGELE.19.00046","url":null,"abstract":"Compacted clays in landfill applications are subjected to both physico-chemical changes and wet–dry cycles. Physico-chemical interactions occur at the microstructural level between the clay particl...","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"42 1","pages":"348-354"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78194896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Macroscopic interpretation of nano-scale scattering data in clay","authors":"G. Birmpilis, R. Ahmadi-Naghadeh, J. Dijkstra","doi":"10.1680/jgele.18.00241","DOIUrl":"https://doi.org/10.1680/jgele.18.00241","url":null,"abstract":"The potential of X-ray scattering measurements for monitoring changes on the nano-scale in fine-grained materials in their natural wet state is demonstrated with a series of feasibility tests on well-controlled, kaolin samples, i.e. water content, pH and loading history. The results indicate that subtle changes on the nanometric scale, especially the particle orientations, can be measured with high fidelity using a standard laboratory Small and Wide angle X-ray Scattering instrument. This opens up possibilities for future in-situ loading tests with simultaneous monitoring of the evolving changes of the fabric in fine-grained soils.","PeriodicalId":48920,"journal":{"name":"Geotechnique Letters","volume":"19 1","pages":"355-360"},"PeriodicalIF":2.1,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78553044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}