荆江大堤护岸险工典型矶头近岸河床演变分析  

Analysis on near bank riverbed evolvement of typical rock spurs along Jingjiang levee

作　　者：段光磊[1] 余文畴[2] 龙慧 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]长江科学院,湖北武汉430010 [3]长江水利委员会荆江水文水资源勘测局,湖北荆州434020

出　　处：《泥沙研究》2007年第6期32-38,共7页Journal of Sediment Research

基　　金：国家重点基础研究发展计划(973计划)资助项目(2003CB415200)

摘　　要：荆江大堤为长江中下游重要堤防。在荆江大堤迎流顶冲段修建了护岸工程。本文在不同的险工段选择观音矶、杨二月矶和龙二渊矶等三个典型矶头,根据近50年原型观测资料,统计不同时段典型矶头附近局部冲刷坑的特征,分析了典型矶头近岸河床年际、年内演变特点及其影响因素,全面概括了三峡工程蓄水前上述三矶头险工状况,为清水下泄河道冲刷情况下应急工程加固提供依据。Jingjiang levees are important to the middle and lower Yangtze River.At the reaches with the levee against the river flow,some protection works for banks have been constructed.In this article,three typical rock spurs in different dangerous reaches,Guanyin,Yangeryue and Longeryuan,are selected for study.By field data of recent 50 years the characteristics of the local scour pits of the typical rock spurs in different periods are analyzed statistically.The development characteristic of the near bank riverbed within a year and multiple years and the influence factors of the typical rock spurs are analyzed.The states of the three typical rock spurs before the operation of the Three Georges Project is generally described.This study could be a basis for the urgent levee protection in case of erosion by clear water released from TGP.

关 键 词：荆江大堤 险工 矶头 河床演变 

分 类 号：TV147.5[水利工程—水力学及河流动力学]