基于有限元强度折减法分析主应力方向对隧道稳定性的影响
发布时间：2019-01-22 19:18
【摘要】：以有限元强度折减法为基础,文章采用物理模型试验和数值模拟相结合的方法研究了主应力方向对砂岩隧道稳定性的影响规律;数值模拟采用ABAQUS软件计算了直墙拱形隧道在不同主应力方向下的稳定系数和积分点上的塑性应变,计算结果与模型试验结果吻合较好。研究结果表明:有限元强度折减法能够很好地应用于隧道的稳定性分析;主应力方向对隧道的稳定性具有很大的影响;如果仅考虑主应力方向这单一因素对隧道整体稳定性的影响,当主应力方向与隧道断面夹角为45°时,隧道模型的整体抗压强度最低,稳定系数Fs最小,此时隧道稳定性最差。
[Abstract]:Based on the finite element strength reduction method, the influence of the direction of principal stress on the stability of sandstone tunnel is studied by means of physical model test and numerical simulation. The stability coefficient and the plastic strain at the integral point of the straight wall arch tunnel under different principal stress directions are calculated by ABAQUS software. The calculated results are in good agreement with the model test results. The results show that the finite element strength reduction method can be applied to the stability analysis of the tunnel, and the direction of the principal stress has a great influence on the stability of the tunnel. If only the influence of the direction of principal stress on the overall stability of the tunnel is considered, when the angle between the direction of principal stress and the section of the tunnel is 45 掳, the overall compressive strength of the tunnel model is the lowest, the stability coefficient Fs is the minimum, and the stability of the tunnel is the worst.
【作者单位】： 四川大学建筑与环境学院能源工程安全与灾害力学教育部重点实验室;
【基金】：国家自然科学基金项目(11672194) 四川省科技计划项目(2014JY0002) 油气藏地质及开发工程国家重点实验室资助项目(PLN1505)
【分类号】：U451
，
本文编号：2413491
[Abstract]:Based on the finite element strength reduction method, the influence of the direction of principal stress on the stability of sandstone tunnel is studied by means of physical model test and numerical simulation. The stability coefficient and the plastic strain at the integral point of the straight wall arch tunnel under different principal stress directions are calculated by ABAQUS software. The calculated results are in good agreement with the model test results. The results show that the finite element strength reduction method can be applied to the stability analysis of the tunnel, and the direction of the principal stress has a great influence on the stability of the tunnel. If only the influence of the direction of principal stress on the overall stability of the tunnel is considered, when the angle between the direction of principal stress and the section of the tunnel is 45 掳, the overall compressive strength of the tunnel model is the lowest, the stability coefficient Fs is the minimum, and the stability of the tunnel is the worst.
【作者单位】： 四川大学建筑与环境学院能源工程安全与灾害力学教育部重点实验室;
【基金】：国家自然科学基金项目(11672194) 四川省科技计划项目(2014JY0002) 油气藏地质及开发工程国家重点实验室资助项目(PLN1505)
【分类号】：U451
，
本文编号：2413491
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