游荡型河道堤防堤脚水平柔性护垫结构研究  

Research on the Horizontal Flexible Cushion Structure of Wandering River Embankment Foot

作　　者：吴文霞 魏凯 刘加龙 胡小龙 魏红艳 WU Wen-xia;WEI Kai;LIU Jia-long;HU Xiao-long;WEI Hong-yan(Changjiang Survey,Planning,Design and Research Co.,Ltd,Wuhan 430010,China;Department of Hydraulis,Yangtze River Scientific Research Institute,Wuhan 430010,China)

机构地区：[1]长江勘测规划设计研究有限责任公司公司,武汉430010 [2]长江科学院水力学所,武汉430010

出　　处：《中国农村水利水电》2021年第5期68-73,79,共7页China Rural Water and Hydropower

基　　金：国家重点研发计划项目(2017YFC1501206);长江勘测规划设计有限责任公司自主创新项目(CX2017Z09)。

摘　　要：保证堤防安全必先固岸护脚。在游荡型河道中,近岸水流尤为湍急,现有的很多护脚结构易破坏,导致堤脚易淘刷破坏,引起堤防安全问题。选取使用较为广泛的石笼结构为基础开展河工模型试验,设计不同流量、流速及水流方向的试验组次,根据实验结果提出一种堤防堤脚水平柔性护垫结构,其宽度可取冲刷深度的1.5~2倍并增加适当安全余度,石笼单元体积以防护宽度范围内设置不少于3~4个石笼为参考。该结构不仅具有较强的抗冲性和透水性,而且具有整体性和较强的地形适应性,当堤脚外部河床被初步淘刷后,可随坡就势保护堤脚河床,防止河床被进一步冲刷,从而提高堤防堤脚的保护效果。To ensure the safety of the embankment,the bank foot protection must be fixed first.The near-shore water flow is more turbulent,especially in the wandering river.Many existing bank foot protection structures are easy to break,making the embankment foot easy to scour and damage,which causes the embankment safety problem.This research selects the widely used stone cage net structure as a basis for carrying out the model test of river engineering,and designing test groups with different water flow,flow rates and flow directions.According to the experimental results,a horizontal flexible cushion structure for embankment foot is proposed.The width can be 1.5 to 2 times of the scouring depth and increase the appropriate safety margin.The volume of the gabion unit is based on the setting of no less than 3 to 4 gabions within the protection width.The structure has strong anti-rush performance and water permeability,and has integrity and strong terrain adaptability.When the external river bed at the embankment foot is preliminarily scoured,it can protect the river bed at the embankment foot the slope,to prevent the river bed from being further washed away,so as to improve the protection effect of the embankment foot.

关 键 词：堤防 游荡型河道 水平柔性护垫 河工模型试验 石笼网垫 

分 类 号：TV871[水利工程—水利水电工程]