阶谱块体单元法在复杂岩基上重力坝变形与稳定分析中的应用

APPLICATION OF HIERARCHICAL BLOCK ELEMENT METHOD TO DEFORMATION AND STABILITY ANALYSIS OF GRAVITY DAM ON COMPLICATED ROCK FOUNDATION

介绍了弹粘塑性阶谱块体单元法在某重力坝坝段的变形与稳定分析中的应用情况,并与模型试验结果进行对比分析,两者基本吻合。通过计算和试验,揭示了该重力坝坝段的位移、应力、应变和点安全系数分布规律,验证了弹粘塑性阶谱块体单元法的正确性和有效性。此外,还对重力坝坝内压力钢管道和厂坝接缝灌浆的模拟、以及大坝安全度的评价等实际问题作了初步探讨。

The application of hierarchical block element method to the deformation and stability analysis of gravity dam is briefly introduced. By using elasto-viscoplastic hierarchical block element method,the deformation and stability of gravity dam located on complicated rock foundation are analyzed and the calculation results are in favorable agreement with those obtained from physical model tests. The distribution rules of displacement,stress and local safety factor of dam and foundation system are revealed. The comparisons of the results between model tests and numerical calculations show the correctness and validity of elasto-viscoplastic hierarchical block element method illustrated in this paper. Additionally,some practical problems,such as simulations of embedded penstock and seam between dam body and power plant,and evaluation of dam safety,are tentatively explored.