| 节理岩体中隧道开挖后渗流场重分布影响因素研究 |
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| 作者单位： | ;1.西南交通大学交通隧道工程教育部重点实验室 |
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| 摘 要： | 在富水地区的节理岩体中开挖隧道会打破原有的渗流平衡,形成新的渗流场,造成突水等灾害。考虑流固耦合作用,运用离散元理论,建立垂直交叉节理岩体模型,以洞周测点的流量为指标,从地应力、水位高度和节理法向刚度等方面进行隧道开挖后节理岩体渗流场重分布的影响因素研究,并从开挖前后节理隙宽和水压力变化分析影响产生的原因,结论可为进一步研究围岩稳定性和突水灾害等提供参考。
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| 关 键 词： | 富水隧道 节理岩体 渗流 离散元 流固耦合 |
Research on Seepage Field Redistribution of Tunnel in Fractured Rock Mass |
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| Institution: | ,Key laboratory of Transportation Tunnel Engineering,Ministry of Education,School of Civil Engineering,Southwest Jiaotong University |
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| Abstract: | Tunneling in water-affluent area is likely to break the balance of seepage and form new seepage field,which may result in water outburst. Considering fluid-solid coupled interaction,this paper studies the effect of different crustal stress,water level and joint normal stiffness on seepage of tunnel in fractured rock. Causes of seepage changes resulted from different impact factors are analyzed by analyzing alterations of the width of fissure and water pressure before and after excavation. The conclusions may provide references for further researches on rock stability and water irruption. |
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| Keywords: | Water-affluent tunnel Jointed rock mass Seepage Discrete element Fluid-solid coupled interaction |
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