蓄水条件下某水电工程坝址区变形体变形 与稳定性研究

库岸边坡在蓄水后的变形和稳定问题一直是水电工程的主要问题, 尤其是坝址区库岸边坡稳定性对水电工程 的正常运营起着至关重要的控制作用。针对黄河上游某水电站库岸一变形体边坡, 在对该变形体边坡基本特征分 析的基础上, 采用数值计算的手段, 对黄河上游某水电站坝址区变形体在自然及蓄水条件下稳定性进行对比分析。 结果表明: 蓄水后变形体边坡的变形具有明显的分区特征, 且坡体的变形受影响较大。同时, 利用强度折减法对变 形体的稳定性系数进行了计算, 变形体的稳定性较好, 考虑到坡体局部稳定性较差, 可能会产生局部失稳破坏, 因 此, 需采取支护措施保证该处坝址区变形体在运营期间的长期稳定性。

Deformation under storage conditions and stability of a hydroelectric dam site area of deformation

Bank Slope deformation and stability in storage after the hydropower project has been a major problem, especially in slope stability Res2 ervoir Dam Area of the normal operation of the hydropower project control plays a vital role. T he upper reaches of the Yellow River Hydropower Reservoir for a deformation of a slope, slope deformation based on the basic characteristics of the analysis, the use of the means of numerical cal2 culation, under natural conditions, and impoundment of a hydropower dam on the upper reaches of the Yellow River area in the deformable body stability were analyzed. The results show that: After impounding deformation slope deformation characteristics have obvious zoning and de2 formed body greatly affected. At the same time, the use of strength reduction factor for the stability of deformable bodies were calculated, better stability deformable body, taking into account the local slope stability is poor, may cause local buckling damage, therefore, need to take support measures ensure the dam area where the deformable body in long2term stability during operations.