清远水利枢纽新建二线船闸对北江下游河势稳定影响试验研究  

Physical Model Study on the Effect of New Second-Line Ship Lock on River Stability of the Main Stream of Beijiang River

作　　者：谭超[1,2,3] 黄本胜 刘达[1,2,3] 邱静 王珍[1,2,3] TAN Chao;HUANG Bensheng;LIU Da;QIU Jing;WANG Zhen(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,China;State-province Joint Engineering Laboratory of Estuarine Hydraulic Technology,Guangzhou 510635,China;Guangdong Provincial Key Laboratory of Hydrodynamics,Guangzhou 510635,China)

机构地区：[1]广东省水利水电科学研究院,广东广州,510635 [2]河口水利技术国家地方联合工程实验室,广东广州510635 [3]广东省水动力学应用研究重点实验室,广东广州,510635

出　　处：《广东水利水电》2019年第8期32-36,共5页Guangdong Water Resources and Hydropower

基　　金：广东省水利科技创新项目资助(编号:2017-11)

摘　　要：在现有水利枢纽建设二线船闸受原有建筑物安全、地形空间等诸多因素限制,二线船闸建设对水流条件及河势稳定的影响较为复杂。该文通过定床物理模型试验,开展了清远水利枢纽船闸新建二线船闸对北江干流河势稳定影响的模型试验研究,各级洪水流量下二线船闸建设后流场基本无变化,水动力轴线的位置基本保持不变,引起河道主要汊道分流比的改变较小。工程建设对该河段总体河势稳定影响不显著,但坝下左侧长丁坝完全拆除,对枢纽与烂柴洲之间河段的河势稳定将造成一定的影响,为了确保清远枢纽下游的河势稳定及北江大堤的安全,建议将不拆除坝下的长丁坝,注意加强烂柴洲现有护岸工程的监测。The construction of second-line ship lock in the existing hydro-junction is restricted by many factors such as the safety of the original building and the topographic space.The influence of the second-line ship lock on flow condition and river regime stability is complicated.Through the fixed bed physical model test,this paper has carried out the effect of the new second-line ship lock of Qingyuan hydro-junction on the river stability of the main stream of Beijiang River.After the construction of the second-line ship lock under flood flow at all levels,the flow field and the location of the hydrodynamic axis were basically unchanged,which caused little change in the distributary ratio of the main branches of the river.The overall effect of the engineering construction on the river stability was not significant,but if the long spur dike is completely demolished,the stability of the river between the hydro-junction and Lanchaizhou would be affected.Additionally,in order to ensure the river regime stability downstream the Qingyuan hydro-junction and the safety of the Beijiang levee,it is suggested that the long spur dam under the dam will not be removed and the monitoring of the existing revetment works at Lanchaizhou should be strengthened.

关 键 词：新建二线船闸 北江干流 河势稳定 模型试验 

分 类 号：TV147.5[水利工程—水力学及河流动力学]