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小型重力坝在农村水利水电工程中使用很普遍。这种小坝具有如下一些特点:坝身很低,勘测、设计和施工力量较弱,运行维修条件较差。如果完全仿照大、中型工程的要求进行设计,常会遇到困难或得出不合理的结果。为此,笔者对具体情况作了一些分析并提出一些看法,供设计小坝的同志参考。在小坝设计中,遇到的问题主要有:(1)它不能象高坝那样设置有效的排水系统和抗滲帷幕并经常维修,所以坝体所受的扬压力是较大的;(2)小坝坝前泥沙沉积高度与坝高的
Small gravity dam in rural water conservancy and hydropower projects is very common. This small dam has the following characteristics: dam body is low, survey, design and construction strength is weak, poor operation and maintenance conditions. If we follow the design requirements of large and medium-sized projects completely, we often encounter difficulties or come to unreasonable results. To this end, I made some analysis of the specific circumstances and put forward some views for the design of small dam comrades reference. In the dam design, the main problems encountered are: (1) It can not set up an effective drainage system and anti-seepage curtain as the high dam and is often repaired, so the uplift pressure on the dam body is greater; (2) Dams dam sediment deposition height and dam height