摘要
拦江矶是长江下游典型的礁石碍航滩险,既存在通航水流条件问题也有泥沙问题.通过河工模型试验与河床演变分析,以实测资料和模型试验数据为依据,全面分析了滩险碍航特征及变化规律,并在此基础上,进行了炸礁整治工程措施布置方案的试验研究,分析了工程实施后滩段通航水流条件的改善及航槽的稳定性.研究结果表明:实施炸礁工程措施,扩大了航道局部断面,并使航槽内分流量增加、流速增大,航槽内不会出现泥沙淤积,反而略有冲刷,可保障航槽的稳定性.
Lanjiangji is a typical hazardous reef shoal in the lower Yangtze River with both flow pattern and sediment problems.Based on analysis of alluvial process and model tests,the feature and changing law of the navigation-obstructing flow of the shoal reach is studied.Then,the layout of reef blasting works is researched in model tests,and the improvement of flow pattern and the stability of navigable waterway in the shoal reach are analyzed and estimated.The results show that after performance of reef blasting works,the flow pattern of the shoal reach is improved evidently and that there is slightly erosion instead of siltation in waterway having assurable stability,because flow discharge and velocity in the waterway is increased due to the enlargement of the cross section.
出处
《水利水运工程学报》
CSCD
北大核心
2011年第1期55-59,共5页
Hydro-Science and Engineering
关键词
长江下游
礁石滩险
整治措施
试验研究
the lower Yangtze River
hazardous reef shoal
improvement measurement
model tests
