深厚粉细砂河床截流施工技术

Construction technology for river closure on deep silt-fine sand bed

黄河海勃湾水利枢纽工程坝址处地层主要以粉细砂为主,河床抗冲流速低,极易对龙口部位形成严重冲刷。通过实施"先进后退"护底法,成功实现了截流,为同类地层条件截流施工提供了借鉴经验。

The stratum at the site of Haibowan Water Control Project on the Yellow River mainly consists of silt-fine sand with a lower river bed anti-erosion flow velocity, and then severe erosion is easily to be formed at the closure-gap therein. Through the implementation of the bottom protection method of＇＇ advancing first and then receding later＂, the river closure is successfully real- ized; which can provide a reference experience for the river closure construction under the similar stratum condition.