混凝土面板堆石坝多通道协同放空水库与改进

发布时间：2018-07-12 16:20

本文选题：混凝土面板堆石坝 + 多通道　；参考：《人民黄河》2017年10期

【摘要】：面板堆石坝以其独特的优越性在我国得到了广泛应用,但其病害率偏高,致命病害体现在防渗体系破坏引发大坝渗漏,这对大坝的检查及加固处理带来一定困难。大坝长期变形是引起防渗体系破坏并直接导致超常规渗漏量的根源,放空水库并对防渗体系进行修补加固可有效地减少渗漏,保证大坝安全。放空系数是衡量面板坝放空能力的一个定量指标,但面板坝设计规范中并没有给出一个设计依据,现有工程对其取值并不统一。结合工程实例,论证了各种泄水建筑物的协同放空流程,说明增加低位泄水建筑物很有必要,改进了放空建筑物布置,如结合导流洞设置前期放空钢管,提高了放空能力。
[Abstract]:The concrete face rockfill dam has been widely used in China for its unique superiority, but its disease rate is on the high side, and the fatal disease is reflected in the seepage caused by the damage of seepage prevention system, which brings some difficulties to the dam inspection and reinforcement. The long-term deformation of the dam is the cause of the damage of the seepage prevention system and directly leads to the abnormal leakage. The leakage can be effectively reduced and the dam safety can be ensured by emptying the reservoir and repairing and strengthening the anti-seepage system. The emptying coefficient is a quantitative index to measure the emptying capacity of face slab dam, but there is not a design basis in the design code of face slab dam, and the value of the existing project is not uniform. Combined with engineering examples, this paper demonstrates the cooperative emptying flow of various drainage structures, which shows that it is necessary to increase the low level drainage structures, and improves the layout of emptying structures, such as the installation of pre-empting steel pipes in combination with diversion tunnels, and the improvement of emptying capacity.
【作者单位】：黄河勘测规划设计有限公司;武汉大学;华北水利水电大学;
【基金】：国家自然科学基金面上项目(51579193)
【分类号】：TV698

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