九德支线引水隧洞衬砌二维有限元数值模拟分析

Two-dimensional finite element numerical simulation analysis of diversion tunnel lining of Jiude Branch Line

本文选取吉林省引水工程中的局部支线具有代表性的九德支线水工引水隧洞为例,利用当今较为前沿的有限元软件ANSYS,筛选出代表性的典型断面来对该隧洞的衬砌结构进行二维数值模拟分析,采用结构力学的算法对其相关内力进行分析、计算,并利用该软件特有的生死单元技术来达到对隧洞的开挖、支护进行仿真模拟的目的,并结合北京理正分析软件对该隧洞在不同工况荷载作用下的受力情况进行计算分析,探求其变形和内力分布规律。结果表明,该水工隧洞的成洞条件较好,弯矩、轴力等均可以满足安全要求,变形和内力分布规律也在合理范围之内,可以为水工隧洞工程提供依据和帮助。

This paper selects the representative hydraulic diversion tunnel of Jiude Branch Line in Jilin Province as an example,using the cutting-edge finite element software ANSYS,the representative typical section is selected for two-dimensional numerical simulation analysis of the lining structure of the tunnel,and the relevant internal forces are analyzed and calculated by the algorithm of structural mechanics.The unique birth and death element technology of the software is used to simulate the excavation and support of the tunnel,and the stress of the tunnel under different load conditions is calculated and analyzed with Beijing Lizheng Analysis Software.to explore the law of deformation and internal force distribution.The results show that the tunnel condition of the hydraulic tunnel is good,the bending moment and axial force can meet the safety requirements,and the distribution law of deformation and internal force is also within a reasonable range,which can provide basis and help for hydraulic tunnel engineering.