芹山面板堆石坝周边缝新型止水结构研究与应用

Study on and application of new sealing structure in the peripheral joints of Qinshan concrete facing rockfill dam

针对芹山面板堆石坝坝高122m、左岸岸坡陡峻、计算剪切变位大(45mm)的特点,对面板坝周边缝的止水结构进行了优化改进。通过分析研究和模型试验,将中部的PVC止水提至表层,采用表层波形止水结构,这在国内外尚属首例。从目前应用情况看,这种止水结构效果较好。

According to the characteristics of the Qinshan concrete facing rockfill dam with the dam height of 122m, the steep side in the left bank and large calculated shear deflection (45 mm), the sealing structure of the peripheral joint of the concrete facing rockfill dam has been optimized and improved. Through the analysis, study and model test, the PVC seal in the middle part has been lifted to the surface part and the surface corrugated sealing structure has been adopted, which is the first case at home and abroad. Viewed from the present application situation, such sealing structure has a good effectiveness.