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采用钢筋应力计、无应力计、应变计、温度计、裂缝计等监测仪器对三板溪混凝土面板堆石坝进行监测,研究三板溪混凝土面板堆石坝在施工期和运行期的应力、变形分布规律,分析混凝土面板产生结构性裂缝的可能原因。监测资料分析结果表明:导致面板水平施工缝挤压破损的直接原因是面板水平缝缝面压应力过大和结构上的缺陷;从外部运行环境看,首次蓄水水位上升过快引起大坝变形速率过大,面板偏心受压,最终导致面板水平缝挤压破损。
The monitoring instruments of Sanbanxi Concrete Faced Rockfill Dam were used to monitor the stress and deformation distribution of Sanbanxi Concrete Face Rockfill Dam during its construction and operation period, using reinforced stress gauge, non-stress gauge, strain gauge, thermometer and crack gauge. , Analyze the possible causes of structural cracks in concrete panels. The monitoring data analysis results show that the direct cause of the crushing damage of the horizontal joint of the panel is the excessive compressive stress and the structural defects of the horizontal joint of the panel. According to the external operation environment, the initial deformation of the dam causes the deformation rate Too large, the panel eccentric compression, eventually leading to the panel horizontal seam extrusion damage.