向家坝水电站大江截流设计与施工

Design and construction of river closure of Xiangjiaba Hydropower Station

向家坝水电站截流工程具有截流流量标准高、截流流速大、分流条件差、抛投强度大等特点,致使截流施工难度较大。在吸收截流模型试验成果的基础上,通过优化截流方案设计,精心组织截流施工,成功地实现了大江截流。简要介绍了该工程截流设计方案及施工过程,并总结了此次截流取得成功的经验,包括充分作好预案、组织实战演习、建立完备水文信息系统、适当降低戗堤堤头高程等。可为类似工程的设计施工提供参考。

The river closure construction of Xiangjiaba Hydropower Station is characterized as high standard of discharge , large velocity of closure flow , worse diversion conditions and huge dumping amount , so the closure is difficult .On the basis of the model test results , the construction of river closure is organized carefully through optimizing the design of closure scheme , and the river closure is completed successfully .The design scheme and construction process are introduced and the experiences are sum -marized , including fully preparing pre -arranged planning , organizing manoeuvre , establishing complete hydrological information system, lowering the elevation of closure dike top , etc..