黄河下游移动式导流坝研究与应用

Studies and application of movable diversion dam in Yellow River downstream

黄河下游游荡性河段河势游荡多变,难以控制,受长期小水流量过程影响,近几年一些河段畸形河势发育,威胁防洪工程和滩区安全。利用预应力钢筋混凝土管桩、盖梁和连接销柱为主要构件的组合式透水桩坝结构,通过钻机、高压射水拔桩器、吊车等主要施工机具可以进行桩坝施工、拆除和移动,根据桩坝在2009年黄河调水调沙期间的运用观测结果,该结构可以作为控制畸形河势、河道整治的可选坝型,应用前景广阔,但需要进一步开展水上施工技术研究,以便推广应用。

The downstream channel of the Yellow River has been a wandering state that is hard to control.The irregular channel regime has been formed in some parts of the river channel in recent years due to influence of long-term small flow, which threatens the flood control works and river bays. Composite permeable pile dam of using prestressed high strength concrete pipe piles, pile cap and joint pin is applied. The construction, removal and movement of the pile dam are conducted by drilling rig, high-pressure water jet pile extractor and hoist etc. According to dam operation observation in water-sand operation in 2009, the structure is feasible for river regime control and river training, which has great potential for future application. However, further research and development is needed for widely extension of the technology.