王中明,朱月健,李楷兵

• 1:黄淮学院建筑工程学院
• 2:河南省第二建筑工程发展有限公司
• 3:北京荣创科宏岩土工程有限公司

摘要(Abstract)：

为研究支护结构对非均匀应力场下圆形隧道的力学特性尤其是围岩塑性区的影响,采用理论分析的方法对已有模型仅能单独考虑原位非均匀应力场或支护结构对隧道围岩塑性区影响的不足展开研究,提出了一种考虑实际施工过程的非均匀应力场下圆形隧道围岩塑性区计算新方法,该方法能够很好地考虑围岩与支护结构的相互作用机理。利用该方法重点研究了隧道围岩初始位移及支护结构刚度对隧道围岩塑性区的影响,结果表明:(1)随着围岩初始位移的增加,围岩塑性区将呈现非线性增加,而当其增加到一定程度时,围岩塑性区增加幅度将十分显著;(2)随着支护结构刚度的增加,围岩塑性区将逐渐减小,但其减小幅度不是很大。因此在实际工程中,应选用合适的支护结构刚度以达到安全和经济的目的。

关键词(KeyWords)： 非均匀应力场;圆形隧道;围岩塑性区;围岩-支护结构相互作用;支护结构刚度;围岩初始径向弹性位移

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2019YFC1509701)

作者(Author): 王中明,朱月健,李楷兵

DOI: 10.13928/j.cnki.wrahe.2020.11.024

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