厂房坝段及其左岸边坡的渗流和抗滑稳定研究

Study on seepage and anti-sliding stability of powerhouse dam section and its left bank slope

以我国四川省境内大渡河沙坪一级水电站部分厂房坝段及其左岸边坡的渗流和抗滑稳定问题为依托,分别采用有限元方法和基于有限差分的强度折减法进行边坡渗流和抗滑稳定的研究。首先建立三维精细化模型,再利用有限元方法得到左岸边坡渗流场并对此进行渗流分析,最后基于有限差分软件,采用强度折减法并将渗流场计算结果作为外加作用力对不同特征水位工况下的边坡抗滑稳定安全系数进行计算分析。结果表明:在不同特征水位工况下该工程厂房坝段及其左岸边坡均符合渗流稳定和抗滑稳定的要求,能够为工程的建设实践提供技术论证。

Based on the seepage and anti-sliding stability of some powerhouse dam sections and the left bank slopes of Shaping Hydropower StationⅠof Dadu River in Sichuan Province,this paper studies the seepage and anti-sliding stability of slopes by using finite element method and strength reduction method based on finite difference,respectively.Firstly,a three-dimensional refined model is established,and then the seepage field of the left bank slope is obtained and analysed by the finite element method.Finally,based on the finite difference software,the strength reduction method is adopted and the calculation results of the seepage field are used as the applied force to calculate and analyse the safety factor of slope anti-sliding stability under different characteristic water levels.The numerical results show that the powerhouse dam section and the left bank slope of the project meet the requirements of seepage stability and anti-sliding stability under different characteristic water level conditions,which provides a technical demonstration for the construction practice of the project.