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...
在无黏性土中，中位粒径对应力波速度的影响在文献中缺乏共识。对于具有赫兹接触的球形粒子的集合…
{"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}
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...
实验研究从微观到宏观，评估了颗粒形状对7种不同来源的天然砂的强度-剪胀特性和物理性质的影响。
{"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}
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...
{"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}
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...
{"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}
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...
本文应用x射线显微计算机断层扫描技术研究了颗粒三维形状特征与粒径的关系。一系列的填料和三轴剪切。
{"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}
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...
{"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}
J. Doreau-Malioche, A. Galvis-Castro, R. Tovar-Valencia, G. Viggiani, G. Combe, M. Prezzi, R. Salgado
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...
本文介绍了在半圆校准室中制备的中密度砂样中预装的仪器模型桩的拉伸和压缩荷载试验结果。
{"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}
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...
{"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}
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...
{"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}
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.
{"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}
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