三峡水利枢纽引航道防淤清淤措施研究

根据三峡水利枢纽通航建筑物的淤积特点，通过引客水破异重流，水帘、气帘和水平附壁射流破异重流，潜坝拦阻异重流以及引流冲沙、引流结合松动冲沙试验，重点研究了防淤清淤措施及其效果。并认为应以机械挖泥为引航道口门外清淤的主要措施。

Study on measures for control and removal of sediment in approach channel of TGP

According to the sedimentation characters of lock approach channel of TGP,various measures of control and removal of sediment and their efficiencies were studied and compared with each other.These measures include:eleminating or reducing density flow(by adding foreign water,by setting air curtain of water curtain,by installing near bottom horisontal jet),or preventing density flow by a low submerged dam,scouring off sand by flowing water as well asscouring sand associating with machinery loosening.After comparative investigation,it is concluded that all the above mentioned measureds have certain effect for preventing or removing sediment,but the main meosure of sediment removal outside the approach channel entrance is machinery dredging.