三峡深水截流堤头坍塌计算及预报

长江三峡大江截流是目前世界上规模最大的深水截流工程 ,截流成败的关键在于堤头进占安全。为了掌握堤头坍塌规律并指导三峡工程大江截流的实施 ,在给出深水截流堤头坍塌计算式组的基础上 ,针对三峡大江深水截流进行了堤头坍塌计算 ,求出了在不同抛投料粒径、不同稳定坡度和不同流量条件下的堤头坍塌长度和体积 ,并点绘成图以便在实施过程中进行坍塌预报。计算及预报成果经三峡工程大江截流的实践验证 ,表明与实际坍塌情况相吻合 ,对保障安全截流起到了重要作用

Calculation and prediction of the dyke end slump for deep water closure of the Three Gorges Project

Closure of the main channel of the Yangtze River for the Three Gorges Project is the largest river closure project in the world. The key to successful closure lies in the safe construction of the closure dyke head. The slump law of the closure dyke in deep water was analyzed theoretically to develop a proceduce for closure of the main Three Gorges channel. The analysis predicts the closure dyke end slump length and volume for different dumped material sizes, slopes and flows. The forecasted results compared well with the actual results for the main channel closure to verify the model for safe river closure.