广义SMP准则在圆形断面隧道围岩渗流解析解的应用

doi:10.19952/j.cnki.2096-5052.2022.04.11

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摘要针对围岩渗透水压力对深埋隧道围岩应力和位移影响尚不明确的情况,采用理论推导和数值计算方法,基于广义空间准滑动面(spatial mobilized plane,SMP)强度屈服准则及非关联流动法则,推导得到考虑渗透水压力的隧道围岩应力和位移弹-脆-塑解析解,并分析渗透水压力和剪胀对隧道围岩位移及应力的影响规律。结果表明:渗透水压力对隧道围岩应力和位移影响较显著,随着渗透水压力增大,隧道各点应力和位移以及塑性区半径都增大,且隧道内外水头差相差越大,应力、位移和塑性区半径变化越大,其中塑性区半径和渗透水压力呈线性正相关。本研究结果对准确确定隧道周边围岩渗透水压力,保证隧道围岩稳定性具有重要意义。

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	杨帆

关键词: 广义SMP准则非关联流动法则渗透水压力圆形断面隧道

Abstract: Aims at the situation that the influence of the seepage water pressure of the surrounding rock on the stress and displacement of the surrounding rock of the deep-buried tunnel is not clear, based on the spatial mobilized plane(SMP)strength yield criterion and non-correlated flow law, the elastic-brittle-plastic analytical solutions of tunnel surrounding rock stress and displacement under seepage water pressure were derived, and the effect laws of seepage water pressure and shear dilatation on the displacement and stress of tunnel surrounding rock were analyzed. <b>Results</b> showed that, the infiltration water pressure had a significant effect on the stress and displacement of the surrounding rock. With the increase of the infiltration water pressure, the stress and displacement of each point of the tunnel and the radius of the plastic zone increased, and the greater difference between the water head inside and outside the tunnel, the greater change of the stress, displacement and the plastic zone radius, among these, the plastic zone radius and the infiltrating water pressure had a linear positive correlation. The results of this research are of great significance for accurately determining the seepage water pressure of surrounding rock around the tunnel and ensuring the stability of the surrounding rock.

Key words: generalized SMP criterion non-correlated flow law infiltrating water pressure circular tunnel

收稿日期: 2022-01-20 修回日期: 2022-04-01 发布日期: 2022-12-20

中图分类号:

U25

基金资助: 基金项目:中铁建股份有限公司重点研发项目B类课题(2020-B04)

作者简介: 杨帆(1970— ),男,山东日照人,高级工程师,主要研究方向为隧道及地下工程、爆破工程等. E-mail:394091549 @qq.com

引用本文:

杨帆. 广义SMP准则在圆形断面隧道围岩渗流解析解的应用[J]. 隧道与地下工程灾害防治, 2022, 4(4): 91-99.
YANG Fan. Application of seepage analytical solution of surrounding rock based on generalized SMP criterion in circular tunnel. Hazard Control in Tunnelling and Underground Engineering, 2022, 4(4): 91-99.

链接本文:

http://tunnel.sdujournals.com/CN/Y2022/V4/I4/91

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