砂砾体围堰在小型水电站工程中的应用及处理

介绍了砂砾体围堰的结构和施工方法,以及采用双层编织布、双层砂砾体编织袋作为堰体迎水面防渗处理的设计形式与施工方法,重点介绍了采用深搅成墙工艺作为堰体基础防渗处理的设计形式与施工方法,并把渗透水量理论计算结果与实际观测的渗透水量进行比较.实践证明,在取土困难而砂砾石蕴藏量丰富的地区,小型水电站采用砂砾体围堰具有就地取材,降低造价,填筑速度快等优点.

Application of Gravel Cofferdam to Small Hydropower Plants and Its Anti-seepage Measures

The structural type and construction methods of gravel cofferdam are introduced;and the type and forms of double fabric bags used as anti-seepage measures are also illustrated as well.At the same time,the stractural type and construction methods of deep mixing wall are introduced;and theoretical seepage volume is compared with practical observed seepage volume.The practice indicates that the application of gravel cofferdam to the area with plentiful gravels but shortage of soils,has lots of advantages such as easy obtaining local materials,low costs and quick construction speed.