• 首 页期刊简介编 委 会规章制度作者指南审稿流程联系我们
期刊封面
倪小东,尹学谦,蔡钟.基于PFC-COMSOL联合开展软土固结细观机理研究[J].河北工程大学自然版,2017,34(2):30-36
基于PFC-COMSOL联合开展软土固结细观机理研究
Study on the meso-mechanism of consolidation of soft soil based on PFC-COMSOL
投稿时间:2017-01-08  
DOI:10.3969/j.issn.1673-9469.2017.02.007
中文关键词:  软土固结  细观  PFC-COMSOL  蠕变
英文关键词:Soft soil consolidation  Mesoscale  PFC-COMSOL  Creep
基金项目:中央高校基本科研业务费资助项目(2016B08114)
作者单位
倪小东 河海大学 岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098;河海大学 岩土工程研究所, 江苏 南京 210098 
尹学谦 河海大学 岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098;河海大学 岩土工程研究所, 江苏 南京 210098 
蔡钟 河海大学 岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098;河海大学 岩土工程研究所, 江苏 南京 210098 
摘要点击次数: 216
全文下载次数: 199
中文摘要:
      基于细观颗粒离散元方法建立土体细观结构性模型,依据室内试验匹配模型细观参数,采用COMSOL软件进行土体内部渗流场求解,实现PFC-COMSOL联合开展软土固结研究,最终将分析方案与室内固结试验数据进行对比。研究结果表明: PFC使用聚粒模拟絮凝状软土能较真实地再现海相软土的细观结构特性;结构性蠕变对软土固结沉降量有一定影响,软土压缩量应考虑蠕变的影响;软土固结过程中首先出现不均匀压缩,超孔压完全消散后,土体恢复均匀性。
英文摘要:
      The mesostructure of soft soil has important influence on the consolidation process,it is of great guiding significance to consider soft soil structure from meso level and reveal the law of consolidation in a large area of reclamation project. In this paper, we establish the soil mesoscale model based on the discrete element method, match mesoscale parameters of the model according to the laboratory test, analyze the distribution of the seepage field in the soil body with COMSOL, realize to solve the consolidation problem of soft soil with PFC-COMSOL, and compare the analysis scheme with the laboratory test. Research results show that simulating flocculation soft soil with poly grain can truly react mesostructure characteristics of soft soil; Creep can influence the decrement in the process of consolidation of soft soil, creep should be considered in calculating the amount of soft soil compression; Uneven compression appears firstly in the process of consolidation of soft soil, after the excess pore pressure is dissipated completely, the soil recovers uniformity.
  查看/发表评论  下载PDF阅读器  下载全文
关闭