土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (4): 497-501.

• 专题论述 • 上一篇    下一篇

基于改进的Bugers模型对云母片岩剪切蠕变特性的研究

刘 廷   

  1. （中国煤炭科工集团南京设计研究院有限公司，南京 210031）
  • 收稿日期:2019-11-07 修回日期:2019-12-24 出版日期:2020-08-20 发布日期:2020-08-15
  • 作者简介:刘 廷（1988-），男，工程师，硕士，研究方向为岩土工程勘察、设计。
  • 基金资助:
    湖北省交通运输厅科技项目（2011-700-3-10）

Shear Creep Characteristic of Mica-Schist Using Modified Bugers Model

LIU Ting   

  1. (China Coal Technology & Engineering Group Nanjing Design & Research Institute Co. Ltd., Nanjing 210031)
  • Received:2019-11-07 Revised:2019-12-24 Online:2020-08-20 Published:2020-08-15

摘要： 通过对十白高速沿线边坡广泛分布的云母片岩开展室内剪切蠕变试验，获得了不同应力条件下时间与水平向蠕变位移曲线图。利用四元件线性黏弹性Bugers模型及改进的Bugers模型，建立了云母片岩蠕变本构模型，并利用两模型对剪切蠕变全过程曲线进行拟合，获得了各应力水平下剪切蠕变模型参数，最后通过将试验曲线与拟合曲线对比分析，验证了模型的正确性和合理性。所得结论对于评价岩体开挖后工程长期稳定性及安全性具有重大意义。


关键词: 云母片岩, 剪切蠕变, 改进的Bugers模型, 本构模型, 曲线拟合

Abstract: Based on the shear creep tests of mica-schist samples, the time and horizontal creep displacement curves under different stress conditions are obtained in this paper. The constitutive model based on the original and modified Burgers models is proposed to simulate the entire process of the shearing creep. The model parameters under various horizontal shear strain are obtained and the test data are compared with the previous fitted data. The results indicate the proposed is appropriate and reasonable. The conclusions can be used for the evaluation of the long-term stability and safety of rock mass after excavation.

Key words: Mica-Schist, Shear Creep, Modified Bugers Model, Constitutive Model, Curve Fitting

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