澜沧江景洪以下贺宽下滩整治方案  

Regulation plan for Hekuan-rapids downstream Jinghong of Lancang River

作　　者：马李伟 MA Li-wei(Chongqing Shipping Engineering Survey and Design Institute of the Yangtze River,Chongqing 401147,China)

机构地区：[1]长江重庆航运工程勘察设计院,重庆401147

出　　处：《水运工程》2022年第11期172-177,共6页Port & Waterway Engineering

摘　　要：基于澜沧江Ⅳ级航道建设工程,以贺宽下滩整治方案为依托,阐述了滩险特性、水文特征和历史整治情况。针对峡谷段滩险航道尺度不足,滩段内流速大、比降陡、流态坏,船舶不能自航上滩的问题,从滩险流速、比降、上滩水力指标等方面对滩险的碍航特性进行研究,采用清礁结合筑坝的思路扩大过水断面、壅高断面水位,减缓流速和比降,解决了滩险航道尺度不足和船舶不能自航上滩的问题。得出在峡谷急流滩险航道整治中采用“上疏下抬”的治理措施,能够解决航道尺度不足和船舶自航上滩困难的碍航问题,为类似滩险的整治提供借鉴。On the basis of the four-level waterway construction project of Lancang River and the regulation plan for Hekuan-rapids, this study illustrates the rapids and hydrological characteristics and the historical regulation situation. Due to insufficient waterway length and depth in the rivers, as well as high flow rates, huge gradients, and bad flow patterns in the rapids section, ships cannot go up by themselves. Hence, this paper researches the navigation-obstructing characteristics of rapids from the aspects such as the flow rate, gradient, and rapids-passing hydraulic indexes and combines rock cleaning and damning for a wider water-crossing section and a higher sectional water level. In this way, the flow rate and gradient are reduced, and the above-mentioned problems can be solved. It is concluded that we can adopt the measure of “dredging up and uplifting down” to solve the problem of insufficient waterway length and depth in the rivers and difficulty in ships going up by themselves. The research result provides a reference for similar rapids regulation.

关 键 词：急滩 上滩指标 上疏下抬 

分 类 号：U617[交通运输工程—船舶及航道工程]