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第一代几座碾压混凝土(RCC)坝蓄水后出现了显著规模的渗漏,这个事实今未来大坝的主人们关注。大坝合格设计的关键是把减渗和集渗结合起来以安全经济地满足工程运用的要求。全世界迄今建成的碾压混凝土工程的大多数是用于防洪、季节性蓄水或灌溉,因而渗漏损失不成为主要问题。随着第二代水头更高的综合利用的碾压混凝土坝的设计与建造,阻止渗漏的需要会增强。本文叙述碾压混凝土坝的渗流性质,迄今所采用的渗流控制措施并小结其实际功效。本文的结语认为,碾压混凝土坝并非必定比常规混凝土坝渗漏更多的水,发生的渗漏一般会随时间逐渐减少,已有了一些被证实有效的集渗减渗方法,这类措施的应用应当成为实现工程目标的必要条件。
The first generation of several RCC dams experienced a significant scale of leakage after the impoundment of water, a fact that today’s dam owners are concerned about. The key to the qualified design of the dam is to combine desorption and seepage infiltration to meet the requirements of engineering application safely and economically. The majority of RCC projects built so far in the world are for flood control, seasonal water storage or irrigation and therefore seepage losses are not a major issue. With the design and construction of a second generation of roller compacted concrete dam with a higher utilization of the head, the need to prevent leakage is enhanced. This paper describes the seepage properties of RCC dam, the seepage control measures adopted so far and summarizes its actual effectiveness. The conclusion of this paper argues that RCC does not necessarily leak more water than conventional concrete dams, and leakage generally decreases over time, and some proven methods of infiltration and infiltration have been developed. Such measures The application should be the necessary condition to achieve the project goal.