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基于D-P准则的盾构隧道围岩与衬砌结构相互作用分析

何川 齐春 封坤 肖明清

何川, 齐春, 封坤, 肖明清. 基于D-P准则的盾构隧道围岩与衬砌结构相互作用分析[J]. 力学学报, 2017, 49(1): 31-40. doi: 10.6052/0459-1879-16-344
引用本文: 何川, 齐春, 封坤, 肖明清. 基于D-P准则的盾构隧道围岩与衬砌结构相互作用分析[J]. 力学学报, 2017, 49(1): 31-40. doi: 10.6052/0459-1879-16-344
He Chuan, Qi Chun, Feng Kun, Xiao Mingqingy. THEORETICAL ANALYSIS OF INTERACTION BETWEEN SURROUNDING ROCKS AND LINGING STRCTURE OF SHIELD TUNNEL BASED ON DRUCKER-PRAGER YIELD CRITERIA[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(1): 31-40. doi: 10.6052/0459-1879-16-344
Citation: He Chuan, Qi Chun, Feng Kun, Xiao Mingqingy. THEORETICAL ANALYSIS OF INTERACTION BETWEEN SURROUNDING ROCKS AND LINGING STRCTURE OF SHIELD TUNNEL BASED ON DRUCKER-PRAGER YIELD CRITERIA[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(1): 31-40. doi: 10.6052/0459-1879-16-344

基于D-P准则的盾构隧道围岩与衬砌结构相互作用分析

doi: 10.6052/0459-1879-16-344
基金项目: 

国家自然科学基金 U1361210,51578462

国家重点研发计划 2016YFC0802200

中央高校基本科研业务费专项资金 2682015CX077

和中国铁路总公司科技研究开发计划 2014G004-0

详细信息
    通讯作者:

    何川,教授,主要研究方向:地铁及水下盾构隧道结构理论、大型及复杂交通隧道结构安全及长大交通隧道运营控制等.E-mail:chuanhe21@163.com

    3)封坤,副教授,主要研究方向:现代盾构隧道技术与结构设计理论.E-mail:windfeng813@163.com

    4)肖明清,教授级高级工程师,主要研究方向:水下隧道及高速铁路隧道设计.E-mail:tsyxmq@163.com

  • 中图分类号: U25;U451

THEORETICAL ANALYSIS OF INTERACTION BETWEEN SURROUNDING ROCKS AND LINGING STRCTURE OF SHIELD TUNNEL BASED ON DRUCKER-PRAGER YIELD CRITERIA

  • 摘要: 在进行盾构隧道管片衬砌结构载荷计算时,常采用全土柱或压力拱理论计算围岩松动压力,但当盾构隧道面临深埋条件且需计入形变压力时,该方法难以适用.鉴于此,基于Drucker-Prager屈服准则,推导了考虑渗流效应影响下围岩与衬砌结构相互作用的弹塑性解析解,给出了围岩弹、塑性区应力与位移、塑性区半径等关键参数与支护阻力间关系的解析式.阐述了上述解析结果在确定衬砌结构载荷中的应用,即建立围岩与衬砌结构静力平衡状态并求二者对应曲线的交点.进一步地,考虑接头引起管片衬砌结构整体刚度降低对围岩与衬砌结构相互作用的影响,引入刚度折减系数,并在衬砌结构围岩压力确定中对施工期流固耦合效应的影响和渗流力对衬砌结构支护特性曲线的影响进行了简化处理.最后,通过算例将解析解与水下盾构隧道载荷实测值和数值计算值进行了比较.结果表明:用解析方法得到的施工期和稳定期的管片衬砌结构围岩压力比现场实测值分别大28%和12%,稳定期围岩压力比数值计算值大5%,可为类似工程的设计施工提供一定的参考价值.

     

  • 图  1  隧道-围岩渗流分析模型

    Figure  1.  Model of tunnel-surrounding rock seepage analysis

    图  2  隧道-围岩弹塑性力学分析模型

    Figure  2.  Mechanical model of tunnel-surrounding rock elasto-plastic analysis

    图  3  径向支护阻力与围岩塑性区大小的关系

    Figure  3.  Relationship between radical support pressure and radius of plastic zone of surrounding rock

    图  4  围岩收敛曲线和衬砌支护特性曲线

    Figure  4.  Ground reaction curve (GRC) and support characteristic curve (SCC)

    图  5  围岩与衬砌结构的相互作用

    Figure  5.  Interaction between surrounding rock and lining structure

    表  1  等代层参数

    Table  1.   Parameters of equivalent layer

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  • 收稿日期:  2016-11-25
  • 修回日期:  2016-12-04
  • 网络出版日期:  2016-12-04
  • 刊出日期:  2017-01-18

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