Kuang Cheng, Xinyu Ping, Buyao Han, Hao Wu, Hongshuai Liu
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引用次数: 0
Abstract
Deformation induced by finer particle loss is an important phenomenon during suffusion of gap-graded soils. This study focuses on the role of particle stress played in the particle loss-induced volumetric deformation. Discrete element simulations are performed to generate loss of finer particles with prescribed stress contribution, i.e. the contribution of particle stress to the macroscopic stress. Variations of volumetric strain, εv, with the stress contribution, Cσe, of eroded finer particles present two distinct patterns, that is, transition pattern, i.e. εv has extremely small values at relatively small Cσe and increases rapidly as Cσe exceeds the transition point near Cσe = 0.01%, and constant pattern, i.e. εv reaches a rather large value at extremely small Cσe and varies little with the increment of Cσe. A transformation from constant to transition pattern is observed for the εv–Cσe curves with the increment of the coordination number, Zstrong, of the load-carrying skeleton. The threshold of Zstrong for the transformation is around 3.71 for a relatively small eroded fraction (≤ 10%), while it is 3.96–4.09 for a relatively large eroded fraction (≥ 30%), in which the eroded fraction is the volume percentage of the eroded finer particles within the finer fraction.
期刊介绍:
Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.