天荒坪抽水蓄能电站上水库设计

The design of the upper reservoir of Tianhuangping Pumped-storage Power Plant

经优化设计 ,天荒坪抽水蓄能电站主坝选定为沥青混凝土斜墙土石坝 ,弧线坝轴线 ,库底也采用沥青混凝土防渗。实践表明 :沥青混凝土护面适应地基不均匀沉陷的能力较强 ,局部开裂后 ,修补容易 ,且修补施工时间短 ;而为了沥青混凝土防渗护面的安全运行 ,应重视三个环节 :①下卧层的质量必须满足要求 ;②初次蓄排水试验必须严格按要求进行 ;③沥青混凝土护面的质量必须得到保证。

According to the optimal design, the main dam for the Tianhuangping Pumped storage Power Plant is selected as an asphalt concrete sloping core earth rock dam with a curved axis. The bottom of the reservoir adopts asphalt concrete to control seepage. The practice showed that the asphalt concrete face has strong capacity to meet the differential settlement of foundation and is easy to repair its local cracks in a short time. In order to ensure the safe operation of asphalt concrete impervious face, the following three points should be stressed. Firstly, the quality of lower bedding layer should meet the requirements. Secondly, the initial impoundment and drainage test should be conducted strictly in accordance with the requirements. Thirdly, the quality of asphalt concrete face should be guaranteed.