长江上游卵石滩群平面形态及碍航特性  

Channel planform and navigation-obstructing characteristics of gravel beach group in upper reaches of the Yangtze River

作　　者：刘勇 张帅帅 何乐 朱俊凤 张毅 

机构地区：[1]长江重庆航运工程勘察设计院,重庆401147 [2]长江航道局,湖北武汉430010

出　　处：《水运工程》2016年第1期125-129,共5页Port & Waterway Engineering

基　　金：国家科技支撑计划项目(2012BAB05B02)

摘　　要：川江以滩多、流急、水乱而闻名于世,部分滩险之间距离较近,滩险之间相互制约,整治存在相互联动效应,形成滩群,其中卵石滩群碍航特性最为复杂,整治难度非常大。通过对长江上游8个卵石滩群平面形态及以斗笠子—东溪口、神背嘴—叉鱼碛卵石滩群为代表的滩段之间关联特性的分析得到以下认识:卵石滩群一般位于连续弯道(急弯),深槽连接段短、宽度变化大的"藕节状"分汊型河段;下游滩险整治易引起上滩险水位降低,比降增加,恶化上滩险的航道条件;上游滩险整治易改变来水来沙条件,影响下游滩险河床演变。对卵石滩群的整治应整体规划、设计,一次建成。The Chuanjiang river is well known for many waterways, rapids and hazardous regions. There are many types of pebble beaches in this reach, the formation mechanism of which are complex. The beaches are restricted by each other and waterway regulation is difficult. Based on the analysis of the channel planform of the eight gravel beach groups in the upper Yangtze River and linkage characteristics represented by Doulizi-Dongxikou and Shenbeizui-Chayuqi gravel beach groups. The gravel beach groups generally locate in the continuous sharp curve and the branched reach with short connection at the deep groove and great change of width. Regulation of the downstream rapids leads to reduction of water stage and increase of gradient of the upper rapids, and thus worsen the channel condition of the upper rapids. The regulation of the upper rapids changes the water and sediment conditions and influence the bed evolution of the downstream rapids. The regulation to the gravel beach group shall be planned and designed integratedly and implemented all in one time.

关 键 词：卵石滩群 碍航特征 平面形态 

分 类 号：U611[交通运输工程—船舶及航道工程]