新型透水拦沙坎在格尔木河治理中的应用  

Application Analysis of New Permeable Sand Barrage in Golmud River Regulation

作　　者：苏东喜[1] 端木灵子[1] 郑微微[1] 赵宇[1] SU Dongxi;DUANMU Lingzi;ZHENG Weiwei;ZHAO Yu(Yellow River Engineering Consulting Co.,Ltd,Zhengzhou 450003,China)

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《人民黄河》2018年第12期68-71,共4页Yellow River

摘　　要：在分析传统拦沙坎设计特点及自身结构原因引起的坎下冲刷加剧等问题的基础上,提出新型透水拦沙坎改进方法和工作原理:通过坎体开孔分流,降低坎上水头和坎后流速,有利于河床稳定。结合格尔木河治理中对该新型拦沙坎的应用情况,阐述其主要设计参数及选取过程。透水拦沙坎的坎体开孔率、开孔方式、分流比是影响坎位水流状况的关键。格尔木河公路桥下拦沙坎设计以主槽满流为控制条件,根据河道及水流特性,计算对比开孔率0～40%之间的坎前、坎后流速变化,综合确定开孔率取15%,开孔孔径150 mm,分流比6.69%,经初步运行,上下游冲淤情况良好。This paper analyzed the design features of the traditional sand barrier and the problems of intensified scour under the sand barriercaused by its own structural reasons and put forward the improved method and working principle of the new permeable sand barrier, that is,to divert water through the opening of the sand barrier to reduce the head above the sand barrier and the velocity behind the sand barrier fordelaying the riverbed evolution time. Combined with the application of the new sand barrier in Golmud River regulation, the main design pa-rameters and selection process were described. The opening ratio, opening mode and diversion ratio of the permeable sand barrier were thekeys to control the safe operation of the water flow over the barrier. The design of the sand barrier under the Golmud River Highway Bridgetook the full flow of the main channel as the control condition, calculated and compared the flow velocity and momentum energy changes be-fore and after the barrier with an opening ratio of 0-40%, comprehensively determined that the opening ratio was 15%, the opening aperture150 mm and the diversion ratio was 6.69 %. After initial operation, the upstream and downstream erosion and deposition were in good condition.

关 键 词：河道治理 拦沙坎 开孔率 格尔木河 

分 类 号：TV851[水利工程—水利水电工程]