基于ANSYS有限元法的鲜店拱坝坝肩裂隙处理方案研究

选取四川省蓬安县鲜店拱坝作为分析研究的实例基础,应用有限单元法的基本理论,采用ANSYS分析软件,创建了鲜店拱坝及其地基的初始三维有限元模型,将坝体与基岩视为理想弹塑性材料,以Drucker-Prager准则为屈服准则,以位移突变法作为判断坝体是否失稳的依据,采用夹层式裂隙模型,模拟坝肩裂隙和裂隙的处理措施,以静水荷载作为主要的荷载对拱坝进行稳定及应力分析。结果证明:将垮塌的滑坡体彻底清除干净,再用C15细石混凝土埋块石回填,对裂隙用低压浓浆进行固结灌浆处理,这种处理方式是合理可行的。该方式不仅可为其他类似病害工程提供经验和参考,还可将之推广到以后的水利工程建设中。

Research on the treatment of Xiandian arch dam shoulder crack based on the ANSYS finite element method

Taking Xiandian arch dam in Peng''an County of Sichuan Province as an example, the initial 3D finite element model based on the finite element method was established to be applied in Xian Dian arch dam and its foundation. Taking the dam and its bedrock as ideal elastic plastic materials, the sandwich type crack model based on the Drucker-Prager yield criterion and the method of displacement mutation was used to simulate crack of dam shoulder and analyze the stress stability of the dam. The results showed that it was reasonable and feasible to consolidate grouting with low pressure thick paste and backfill with C15 fine stone concrete buried stone on the basis of completely removing the landslide collapse. This method can not only provide experiences and references for other similar engineering projects, but also can be widely applied to the construction of water conservancy projects in the future.