惠州抽水蓄能电站地下高压钢筋混凝土岔管三维有限元分析

采用三维弹塑性有限元数值方法,对惠州抽水蓄能电站引水隧洞的高压钢筋混凝土岔管在施工开挖、充水运行以及放空检修三种工况下进行了计算分析,特别地比较了充水运行工况下内水压分别以面力和渗透体积力施加于衬砌的两种算法,验证了地下高压钢筋混凝土岔管按透水衬砌设计时内水压按渗透体积力计算的合理性,并对衬砌的配筋及最大裂缝宽度进行了探讨.

3-D Finite Element Analysis of Underground High Pressure R.C. Bifurcation of Huizhou Pumped Storage Power Station

In accordance with the practice of the unde station, by using 3D elastoplastic FEM, the stresses rground reinforced concrete bifurcation of Huizhou pumped storage power and displacements of the surrounding rock, lining and anchor bolt are computed under different working conditions such as construction, internal water pressure and external water pressure. And it is especially compared the two results when the internal water pressure load considering as superficial force and uniform seepage flow force in the internal water pressure working condition, and validated that it is advisable to consider internal water pressure as uniform seepage flow force in the design of permeable lining. Also the calculation of the crock width and reinforcement rate for concrete lining is discussed.