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首页> 外文期刊>Mathematical Problems in Engineering >Plastic Design Theory of Frozen Wall Thickness in an Ultradeep Soil Layer Considering Large Deformation Characteristics
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Plastic Design Theory of Frozen Wall Thickness in an Ultradeep Soil Layer Considering Large Deformation Characteristics

机译：考虑大变形特征的超深土层冻结壁厚度塑性设计理论

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摘要

Frozen wall design theory is a key technique of the freezing method. However, previous design theories for a deep artificial frozen wall have neglected the influence of shaft flank displacement, that is, the displacement of the inner boundary of a frozen wall. Thus, the associated designs tend to be unsafe and earthwork excavations tend to be underestimated. This study builds a new design theory for frozen wall thickness which considers the influence of a large strain and obtains new solution formulas for the thickness and excavation radius before deformation occurs. The analytical results are compared with numerical calculation results by analyzing the influences of various parameters, such as crustal stress, cohesion and internal friction angle of frozen soil, and cohesion and internal friction angle of unfrozen soil as well as the elastic modulus of the ground, on the frozen wall thickness and the shaft flank displacement. The results indicate that the new formula is applicable for large deformation calculation with a strain of up to 0.2. The new formula can accurately calculate the amount of excavation earthwork and serves as a safer and more reasonable theoretical support for the design of frozen walls in ultradeep soil layers.
机译：冻结墙设计理论是冻结方法的关键技术。但是，以前的深层人造冻结壁设计理论忽略了轴侧面位移的影响，即冻结壁内边界的位移。因此，相关的设计往往是不安全的，土方开挖往往会被低估。这项研究建立了一种新的冻结壁厚度设计理论，该理论考虑了大应变的影响，并获得了变形发生前的厚度和开挖半径的新求解公式。通过分析地壳应力，冻土的内聚力和内摩擦角，未冻土的内聚力和内摩擦角以及地面的弹性模量等各种参数的影响，将分析结果与数值计算结果进行了比较，冻结壁的厚度和轴的侧面位移。结果表明，该新公式适用于应变高达0.2的大变形计算。该新公式可以准确地计算出开挖土方量，并为设计超深土层中的冻土墙提供更安全，更合理的理论依据。

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  • 来源
    《Mathematical Problems in Engineering》 |2018年第6期|8513413.1-8513413.10|共10页
  • 作者

    Zhang Bo; Yang Weihao; Wang Baosheng;

  • 作者单位

    China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China;

    China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China;

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