澜沧江曼丙滩险整治方案  

Regulation scheme of Manbing beach risk in Lancang River

作　　者：袁涛峰 YUAN Taofeng(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》2023年第12期104-111,共8页Port & Waterway Engineering

摘　　要：以澜沧江曼丙滩险整治为依托,针对峡谷型急流滩险整治易导致滩险本身以及上游滩险水位跌落的问题,从峡谷滩险比降、流速、流态、消滩指标等方面分析滩险碍航成因,提出通过炸礁保障航道基本尺度,采用抛筑整治建筑物缓解整治滩险及上游邻近滩险水位跌落。得出在兼具宽浅-窄深和浅区-深潭相间碍航特征的滩险整治中,采用窄深形炸礁断面结构和宽顶逆坡潜坝坝体结构可在满足滩险基本航道尺度的前提下减小水位跌落,对类似滩险的整治具有一定借鉴作用。Based on Manbing beach risk regulation in Lancang River,this paper analyzes the causes of navigation obstruction from the canyon beach risk gradient,flow velocity,flow pattern,and beach risk abatement indicators to deal with water level fall decline in beach risks and upper beach risks caused by canyon-type beach risk regulation.The basic channel dimensions should be protected by reef blasting,and the regulation structure should be abandoned to mitigate the water level fall of beach risk regulation and adjacent upstream beaches.The results show that in the regulation of broad-shallow and narrow-deep,shallow areas and deep pools,the cross-section structure of narrow deep reef blasting and body structure of broad-top adverse slope submerged dam can reduce the water level fall under the premise of meeting the basic channel dimensions of the beach.This provides certain references for future regulation of similar beach risks.

关 键 词：峡谷型滩险 急流滩 窄深型 宽顶逆坡潜坝 

分 类 号：U617[交通运输工程—船舶及航道工程]