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Investigation of the excavation of stony soil slopes using the virtual element method

机译：使用虚拟元素法调查石石土坡挖掘

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摘要

This study improved two parts of the virtual element method (VEM) to ensure that the stability of a stony soil slope, especially under excavation conditions, could be better studied. One of the improvements was the specific realization of the excavation algorithm, including the determination of how to identify polygonal elements that needed to be excavated, and the "deactivate and reactivate polygonal elements" used to calculate the excavation load during the slope excavation process. The second improvement was the calculation of the factor of safety (FOS) of a slope by combining shear strength reduction and the Φ-v inequality so that the stability of the stony soil slope could be better evaluated. The principal goal was to extend the latest developed virtual element method to the analysis and calculation of the excavation of a stony soil slope. Because the VEM was shape independent, it also allowed the number of nodes in an element to be chosen flexibly and fluidly, so the number of nodes could be changed easily during a simulated procedure. Two numerical examples of the one-step excavation of a homogeneous slope and the two-step excavation of a stony soil slope were solved with the improved VEM. The numerical results showed that the VEM could accurately simulate the excavation process of the slope.
机译：这项研究改进了虚拟元素方法（VEM）的两部分，以确保石石土坡的稳定性，特别是在挖掘条件下，可以更好地研究。其中一个改进是挖掘算法的具体实现，包括如何识别所需的多边形元素，以及用于计算斜面挖掘过程中的挖掘负荷的“停用和重新激活多边形元件”。第二种改进是通过组合剪切强度降低和φ-V不平等来计算斜率的安全性（FOS）因子，从而可以更好地评估石土斜率的稳定性。主要目标是将最新发达的虚拟元素法扩展到分析和计算石石土坡的挖掘。因为VEM是独立的形状，所以它还允许灵活地和流体地选择元素中的节点的数量，因此在模拟过程中可以容易地改变节点的数量。通过改进的vem解决了均匀斜坡的一步开挖的两步挖掘的两个数值例子和石石土坡的两步挖掘。数值结果表明，VEM可以准确地模拟斜率的挖掘过程。

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  • 来源
    《Engineering analysis with boundary elements》 |2020年第12期|76-90|共15页
  • 作者

    Shan Lin; Hong Zheng; Wei Jiang; Wei Li; Guanhua Sun;

  • 作者单位

    Key Laboratory of Urban Security and Disaster Engineering Ministry of Education Beijing University of Technology Beijing 100124 China;

    Key Laboratory of Urban Security and Disaster Engineering Ministry of Education Beijing University of Technology Beijing 100124 China;

    College of Civil Engineering & Architecture China Three Gorges University Yichang 443002 China;

    School of Civil Engineering and Architecture Linyi University Linyi 276000 China;

    State Key Laboratory of Ceomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China University of Chinese Academy of Sciences Beijing 100049 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Slope; Virtual element method; Finite element method; Stony soil slope; Excavation; Shear strength reduction;

    机译：坡;虚拟元素方法;有限元法;石土坡;挖掘;剪切强度减少;

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