{"title":"正弦载荷下GESCs支撑砂土路堤的动力响应：一种流固耦合方法","authors":"Ling Zhang, Xiaocong Cai, Zijian Yang","doi":"10.1002/nag.70055","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>The geosynthetic-encased stone columns (GESCs) are extensively used for improving weak foundations. Three-dimensional numerical models with a fluid-solid coupling method are established to delve into the dynamic response of GESCs-supported embankment in sand under sinusoidal loading. Further, loading frequency (<i>f</i>), loading amplitude (<i>a<sub>m</sub></i>), embankment loads (<i>σ<sub>e</sub></i>), space-to-diameter ratio (<i>s</i>/<i>D</i>), column length-to-foundation thickness ratio (<i>L</i>/<i>H</i>), and Young's modulus of soil (<i>E</i><sub>s</sub>), are selected to conduct the parametric study. Numerical results indicate that encasement guarantees the anti-liquefaction of GESCs compared to OSCs and untreated foundations. However, the soil outside of the GESCs reinforcement region results in the absolute value of the excess pore water pressure ratio (<i>R</i><sub>u</sub>) larger than 1.0. The sand foundations develop slip surfaces under embankment and sinusoidal loads based on maximum lateral displacement and their positions. GESCs are more sensitive to lower <i>f</i> and higher <i>a<sub>m</sub></i>. It is recommended to consider the <i>σ<sub>e</sub></i> in the dynamic analysis process. A larger <i>L</i>/<i>H</i> or <i>E</i><sub>s</sub>/<i>E</i><sub>c</sub> (<i>E</i><sub>c</sub> = Young's modulus of column) or smaller <i>s</i>/<i>D</i> is conducive to the dynamic resistance of GESCs.</p>\n </div>","PeriodicalId":13786,"journal":{"name":"International Journal for Numerical and Analytical Methods in Geomechanics","volume":"49 16","pages":"4001-4019"},"PeriodicalIF":3.6000,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dynamic Response of GESCs-Supported Embankments in Sand Under Sinusoidal Loading: A Fluid-Solid Coupling Method\",\"authors\":\"Ling Zhang, Xiaocong Cai, Zijian Yang\",\"doi\":\"10.1002/nag.70055\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <p>The geosynthetic-encased stone columns (GESCs) are extensively used for improving weak foundations. Three-dimensional numerical models with a fluid-solid coupling method are established to delve into the dynamic response of GESCs-supported embankment in sand under sinusoidal loading. Further, loading frequency (<i>f</i>), loading amplitude (<i>a<sub>m</sub></i>), embankment loads (<i>σ<sub>e</sub></i>), space-to-diameter ratio (<i>s</i>/<i>D</i>), column length-to-foundation thickness ratio (<i>L</i>/<i>H</i>), and Young's modulus of soil (<i>E</i><sub>s</sub>), are selected to conduct the parametric study. Numerical results indicate that encasement guarantees the anti-liquefaction of GESCs compared to OSCs and untreated foundations. However, the soil outside of the GESCs reinforcement region results in the absolute value of the excess pore water pressure ratio (<i>R</i><sub>u</sub>) larger than 1.0. The sand foundations develop slip surfaces under embankment and sinusoidal loads based on maximum lateral displacement and their positions. GESCs are more sensitive to lower <i>f</i> and higher <i>a<sub>m</sub></i>. It is recommended to consider the <i>σ<sub>e</sub></i> in the dynamic analysis process. A larger <i>L</i>/<i>H</i> or <i>E</i><sub>s</sub>/<i>E</i><sub>c</sub> (<i>E</i><sub>c</sub> = Young's modulus of column) or smaller <i>s</i>/<i>D</i> is conducive to the dynamic resistance of GESCs.</p>\\n </div>\",\"PeriodicalId\":13786,\"journal\":{\"name\":\"International Journal for Numerical and Analytical Methods in Geomechanics\",\"volume\":\"49 16\",\"pages\":\"4001-4019\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-08-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal for Numerical and Analytical Methods in Geomechanics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/nag.70055\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, GEOLOGICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal for Numerical and Analytical Methods in Geomechanics","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/nag.70055","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
Dynamic Response of GESCs-Supported Embankments in Sand Under Sinusoidal Loading: A Fluid-Solid Coupling Method
The geosynthetic-encased stone columns (GESCs) are extensively used for improving weak foundations. Three-dimensional numerical models with a fluid-solid coupling method are established to delve into the dynamic response of GESCs-supported embankment in sand under sinusoidal loading. Further, loading frequency (f), loading amplitude (am), embankment loads (σe), space-to-diameter ratio (s/D), column length-to-foundation thickness ratio (L/H), and Young's modulus of soil (Es), are selected to conduct the parametric study. Numerical results indicate that encasement guarantees the anti-liquefaction of GESCs compared to OSCs and untreated foundations. However, the soil outside of the GESCs reinforcement region results in the absolute value of the excess pore water pressure ratio (Ru) larger than 1.0. The sand foundations develop slip surfaces under embankment and sinusoidal loads based on maximum lateral displacement and their positions. GESCs are more sensitive to lower f and higher am. It is recommended to consider the σe in the dynamic analysis process. A larger L/H or Es/Ec (Ec = Young's modulus of column) or smaller s/D is conducive to the dynamic resistance of GESCs.
期刊介绍：
The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.
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