›› 2017, Vol. 38 ›› Issue (3): 649-655.doi: 10.16285/j.rsm.2017.03.005

• 基础理论与实验研究 • 上一篇    下一篇

基于围岩相互作用的冻结壁弹塑性分析对比研究

管华栋,周晓敏   

  1. 北京科技大学 金属矿山高效开采与安全教育部重点实验室,北京 100083
  • 收稿日期:2016-05-26 出版日期:2017-03-11 发布日期:2018-06-05
  • 通讯作者: 周晓敏,男,1963年生,教授,博士生导师,主要从事矿山井巷与市政交通隧道工程和人工地层冻结工程研究。E-mail: ustb_zhou@163.com E-mail: yidixuezi@126.com
  • 作者简介:管华栋,男,1988年生,博士生,主要从事矿山井巷与市政交通隧道工程和人工地层冻结工程研究。
  • 基金资助:

    国家自然科学基金面上项目(No.51678048)。

Comparative study of elastoplastic of frozen wall based on interaction of surrounding rock

GUAN Hua-dong, ZHOU Xiao-min   

  1. State Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2016-05-26 Online:2017-03-11 Published:2018-06-05
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (51678048).

摘要: 冻结壁弹塑性分析的目的并不是为了减薄冻结壁厚度,而是为可靠性设计提供参考。综述了冻结壁弹塑性分析的发展,基于“包神”公式弹性分析,开展了冻结壁弹塑性力学模型的研究,推导出了应力场和位移场解析表达式,并与不同力学模型进行了对比;分析了采用不同屈服准则时的冻结壁塑性区半径计算公式和进入临塑状态时的水平初始应力判别式。利用工程算例对比分析了不同水平初始应力下,采用不同屈服准则时冻结壁的临塑地压值、塑性区外半径和弹性区外荷载;结果表明,冻结壁临塑地压值增大32%,塑性区半径减小14.5%,冻结壁外载荷减小23.3%,为冻结壁厚度设计的可靠性分析提供了数据支持。

关键词: 冻结壁;围岩;&ldquo, 包神&rdquo, 公式;弹塑性分析;屈服准则

Abstract: The purpose of elastoplastic analysis for frozen wall is not only to reduce the thickness of frozen wall, but also to provide reference for the reliability design. The development of elastoplastic analysis for frozen wall is reviewed, and the elastoplastic mechanical model of frozen wall is studied based on the elastic analysis of “Baoshen” formula. The analytical solutions of the stress field and displacement field are deduced and compared with different mechanical models. Then a discriminant for the horizontal initial stress and the plastic zone radius under different yield criteria are also investigated when the frozen wall is approaching plasticity. According to engineering case studies, the critical edge pressure, the plastic zone radius and the load on elastic zone are analyzed under different initial stress levels and different yield criteria. The results show that the critical edge pressure of the frozen wall is increased by 32%, the radius of the plastic zone is decreased by 14.5%, and the load of the frozen wall is decreased by 23.3%, which provide the data support for the reliability analysis of the design of the frozen wall thickness.

Key words: frozen wall, surrounding rock, “Baoshen&rdquo, formula, elastoplastic analysis, yield criterion

中图分类号: 

  • O 344.3

[1] 王素玲 ,李 杨 ,沈新普 ,刘勤志 . 水井反冲洗地层三维弹塑性固结分析[J]. , 2012, 33(10): 3156-3161.
[2] 陈卫忠 ,曹俊杰 ,于洪丹 ,贾善坡 ,陈培帅. 强风化花岗岩弹塑性本构模型研究(Ⅱ):工程应用[J]. , 2011, 32(12): 3541-3547.
[3] 章定文,刘松玉,顾沉颖. 各向异性初始应力状态下圆柱孔扩张理论弹塑性分析[J]. , 2009, 30(6): 1631-1634.
[4] 庄海洋,陈国兴,梁艳仙,徐 明. 土体动非线性黏弹性模型及其ABAQUS软件的实现[J]. , 2007, 28(3): 436-442.
[5] 高 玮,郑颖人,冯夏庭. 岩土本构模型识别的仿生算法研究[J]. , 2004, 25(1): 31-36.
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