【摘要】 溢洪道是洪水期间保证水库安全的重要设施,其结构安全稳定关系重大,为此规范要求大型水利工程需进行不对称受力工况的结构计算和地震工况动力法稳定计算,而传统结构力学方法难以完成。本研究采用三维有限元数值分析方法,对密云水库第一溢洪道改建工程新建溢洪道闸室的中墩、底板进行模拟试验,研究了不对称受力工况条件下的闸墩变形和地震工况下的闸墩抗滑稳定。定量分析结果表明:溢洪道闸室中墩在不对称受力工况条件下,侧向变形不超过0.1 mm,满足闸墩在闸门槽止水变形2 mm以内的要求,侧向位移小于现状溢洪道;地震工况抗滑稳定安全系数为6.39,满足地震工况抗滑稳定安全系数大于2.3的规范要求;因此新建溢洪道设计方案能够确保其在高水位下检修密闭性和高烈度地震下的安全稳定性。更多还原

【Abstract】 Spillway is an important facility to ensure the safety of reservoir during flood period, and its structural safety and stability are of great importance. Therefore, the code requires large-scale water conservancy projects to carry out structural calculation under asymmetrical stress condition and dynamic stability calculation under earthquake condition, which is difficult to be completed by traditional structural mechanics method. In this study, three-dimensional finite element numerical analysis method is used to simulate the middle pier and bottom plate of the newly-built Spillway Chamber in the reconstruction project of the first spillway of Miyun reservoir. The deformation of the pier under asymmetric stress and the antisliding stability of the pier under earthquake are studied. The quantitative analysis results show that the lateral deformation of the pier in the sluice chamber of the spillway under the condition of asymmetric stress is not more than 0.1 mm, which meets the requirements of the pier within 2 mm of the water stop deformation of the gate slot, and the lateral displacement is less than the current spillway; the safety factor of anti sliding stability under the seismic condition is 6.39, which meets the requirements of the code of safety factor of anti sliding stability under the full seismic condition more than 2.3; therefore, the design of the new spillway is required The scheme can ensure its safety and stability under high water level and high intensity earthquake.更多还原