呼和浩特抽水蓄能电站上水库堆石坝施工期监测数据分析

经对呼和浩特抽水蓄能电站上水库堆石坝施工期长序列监测资料进行分析，发现堆石坝施工期相对沉降量最大为858mm，约占坝高1.2％。其中填筑期最大沉降量为724mm，发生在10环附近，占施工期总沉降量的84.4％，相对稳定期最大沉降量为193mm，发生在顶部，占施工期总沉降量的22.4％，不同高程坝体沉降总体表现为靠近坝轴线大，靠近两坝坡小。坝体水平位移在12mm以内。坝体与坝基间剪切位移已基本趋于收敛，最大值在16mm以内。坝基总体表现为无水压状态，绕坝渗流水位总体较低。坝顶钢筋笼内钢筋应力变化主要受温度影响。结果表明：目前该电站上水库堆石坝各监测物理量处于稳定状态或已基本趋于收敛，堆石坝总体处于安全状态。

Analysis of Monitoring Data During Construction Stage of Reservoir Rock-fill Dam in Hohhot Pumped Storage Power Station

Long sequence monitoring data in construction stage of reservoir rock fill dam on Hohhot Pumped Storage Power Station is analyzed.It is discovered that maximum relative subsidence during rock fill dam construction stage is 858mm, accounting for 1.2% of dam height.Wherein,the maximum settlement during the filling stage is 724mm near the 10th ring,accounting for 84.4% of total settlement in the construction period.Maximum settlement of relative stability stage is 193mm on the top,accounting for 22.4% of total settlement in the construction stage.Dam settlement with different elevations is generally performed as high settlement near the dam axis and low settlement near two dam slopes.Horizontal displacement of the dam is within 12mm.Shear displacement between the dam and the dam foundation has been converged basically.The dam foundation is generally manifested as no water pressure state.Seepage water level around the dam is lower as a whole.Steel bar stress change in the reinforced steel cage at the top of dam is mainly affected by temperature. The results show that：all monitoring physical quantities of reservoir rock fill dam on the power station are stable or have been basically converged at present.The rock fill dam is safe.