摘要
和尚滩是涪陵—丰都河段中典型碍航礁石滩段,该滩两岸礁石分布,岸形极不规则,水流急、比降大且流态紊乱,海损事故频发,成为限制库区4.5 m深水航道整体通航效率和安全的瓶颈。通过对和尚滩滩段的水文特性和碍航特点进行分析,提出切除和尚滩和郭家嘴2处礁石的整治方案,并采用平面二维水流数学模型对方案实施后的效果进行模拟和评估。结果表明,清礁工程有效拓宽了河槽,改善了航槽内的流态,显著降低了横流和回流的强度,提高了通航安全性和效率。清礁后,和尚滩段的上水航路宽度从35 m扩宽至75 m,自航上滩流量从18 000万m^(3)/s提高至30 400万m^(3)/s,滩段通航条件得到显著改善。研究成果可为类似复杂急流河段的航道整治提供参考。
Heshangtan is a typical navigation-obstructing reef section in the river section from Fuling to Fengdu.On both sides of this section,reefs are distributed,the shoreline is extremely irregular,the water flow is rapid,the gradient is large,and the flow pattern is chaotic.Marine accidents occur frequently,which has become a bottleneck restricting the overall navigation efficiency and safety of the 4.5 m deepwater channel in the reservoir area.By analyzing the hydrological characteristics and navigation-obstructing features of the Heshangtan section,a regulation scheme for clearing the reefs at Heshangtan and Guojiazui is proposed,and a two-dimensional plane flow mathematical model is used to simulate and evaluate the effect after the implementation of the scheme.The results show that the reef clearance engineering effectively widened the river channel,improved the flow pattern in the navigation channel,significantly reduced the intensity of cross-flow and backflow,and improved the safety and efficiency of navigation.After the reef clearance,the width of the upstream navigation route in the Heshangtan section is widened from 35 to 75 m,and the self-propelled upstream flow rate is increased from 180 million to 304 million m^(3) s,and the navigation conditions in the section are significantly improved.The research results can provide reference for the channel regulation of similar complex river sections.
作者
庹莜葭
贺艺伟
郭琦
TUO Youjia;HE Yiwei;GUO Qi(Changjiang Chongqing Harbour and Waterway Engineering Investigation and Design Institute,Chongqing 401147,China)
出处
《水运工程》
2025年第8期168-175,共8页
Port & Waterway Engineering
关键词
碍航礁石
水文特性
清礁工程
数学模型
航道整治
navigation-obstructing reef
hydrological characteristics
reef clearance project
mathematical model
channel regulation
