某工程溢洪道侧墙抗滑稳定分析

溢洪道侧墙的抗滑稳定性关乎溢洪道结构运行安全。为了研究溢洪道侧墙的稳定性，结合某工程采用 ANSYS 有限元软件建立复杂台阶状地基面上溢洪道侧墙的三维有限元计算模型，计算分析复杂台阶状地基面的正应力和剪应力，并积分得出总作用效应和总抗力，利用分项系数极限状态表达法来判别溢洪道侧墙的抗滑稳定性。计算结果表明：溢洪道侧墙地基面最大压应力不超过3．9 MPa ，最大拉应力不超过0．5 MPa ，满足地基允许承载能力；侧墙从上游到下游各断面稳定安全富裕度呈现先增大再减小，再增大再减小的类正弦曲线变化趋势，运行期内各断面抗滑稳定满足要求，可为实际工程设计和安全评估提供重要参考。

Engineering Analysis of Anti-sliding Stability in Spillway Sidewall

The operation safety of spillway structure can be influenced by anti-sliding stability of spillway sidewall .To study the stability of spillway sidewall ,the three-dimensional finite element calculation model of the spillway sidewall in complex stepped foundation surface was established by using ANSYS software ,which based on one project ,the normal stress and shear stress of the complex stepped foundation surface was calculated in this paper .It obtained the total effect and total resistance by integral ,and the stability against sliding of the spillway sidewall was discriminated by partial coef-ficient under limit state .The calculation results show that the maximum compressive stress of spillway sidewall surface is less than 3 .9 MPa while the maximum tensile stress is less than 0 .5 MPa ,and the results meet the foundation bearing capacity .The trends of safety margin of sidewall section from upstream to downstream are similar to sine curve and the anti-sliding stability of each section during operation period meets the requirement .It provides important reference for practical engineering design and safety assessment .