渗流作用下输水隧洞应力和变形特性分析

Analysis of stress and deformation characteristics of water conveyance tunnel under seepage action

富水区破碎带的地下洞室施工必须要考虑地下水渗流作用的影响。文章以辽宁省大风口水库新建输水隧洞为例,利用ABQUS软件进行有限元建模,分析了渗流作用下围岩变形和受力情况以及衬砌结构受力情况,结果显示拱腰部位水平应力较大而仰拱和拱顶部位竖向应力较大,在衬砌结构施工中应注意这3个部位的加固。

The influence of groundwater seepage must be considered in the construction of underground cavern in the fractured zone with rich water area.Taking the newly built water conveyance tunnel of Dafengkou reservoir in Liaoning Province as an example,this paper uses ABQUS software to carry out finite element modeling,analyzes the deformation and stress of surrounding rock and the stress of lining structure under the action of seepage,the results show that the arch waist level stress is bigger and the inverted arch and vault area vertical stress is larger,should be paid attention to in the construction of lining structure is the three parts of the reinforcement.