单纯疏浚技术在长江上游卵石浅滩整治中的应用

过渡段浅滩具有顺直放宽的特点,因而汛期淤积,汛后虽有冲刷,但仍达不到水深要求,故需采取整治措施。浅碛子是长江上游枯水期典型的过渡段卵石浅滩之一,该滩整治时没有布置整治建筑物,而仅采用单纯疏浚的技术进行治理,通过对其整治效果进行分析,证明对该滩的治理是成功的、合理的。同时通过对水师坝、黑石碛浅滩整治效果的分析,认为对于长江上游山区河流中,某些碍航程度较轻的一般过渡段卵石浅滩也可通过单纯疏浚技术进行治理。

Application of simple dredging technology in regulating pebble shoals in upper Yangtze River

The crossing shoal has straight and widened characteristics,and it is in depositing during flood season.Although the pebble and sand in crossing shoal are scoured after flood season,the water depth is not able to meet the requirements of ship′s navigation.So it is necessary to take regulation measures to increase the water depth.Qianqizi shoal is one of the typical pebble shoals of crossing sections in upper Yangtze River during dry seasons.When the shoal was regulated,the regulating structures were not arranged.Regulation measure was carried out by using only the simple dredging technology.Even so,it gets a great regulation effect.The same results were achieved in Shuishiba shoal and Heishiqi shoal in upper Yangtze River.It shows that in some crossing shoals on the upper reach of Yangtze River which the navigation obstruction degree is not high,it can get a good result by taking only simple dredging technology.