牛头山水库大坝沥青混凝土面板裂缝分析及除险加固措施

牛头山水库大坝采用沥青混凝土面板砂砾坝。投入运行以来，沥青混凝土面板产生大量裂缝，沥青混凝土老化，物理力学指标衰减严重，坝基混凝土防渗墙局部损坏，被鉴定为三类坝，必须进行除险加固。用迎水面C30钢筋混凝土面板（保留原沥青混凝土防渗面板）加坝基混凝土悬挂防渗墙方案加固重新蓄水后，坝内渗漏管渗漏量接近零，浸润线明显降低，变得比较平缓，表明本次除险加固处理彻底，方案理想，效果明显。

Asphaltum Concrete Face Slab Crack and Reinforcement of Reservoir Dam in Niutoushan

The asphaltum concrete face slab of reservoir dam in Niutoushan, so-called gravel dam, cracks after long period of operation with the appearance of concrete aging, mechanical index dropping and dam foundation impervious wall partly damaging, which was checked as a third-class reservoir. The combination of water face C30 steel concrete plate and dam base concrete suspended impervious wall is proved to be a ideal method of reservoir rehabilitation and reinforcement, gaining a good result of zero-seepage and low phreatic line.