汉江(王家咀至薛家脑段)航道整治试验研究

本文在分析王家咀至薛家脑河段水流、泥沙条件基础上,指出了河道碍航原因,提出航道整治原则和定床试验中的各个特征值,经过验证试验后,进行了三种整治线宽度、走向与三种挖槽断面型态组合而成的七组方案数十次试验,提出以整治线宽度为550m、走向与1987年枯水期河道深泓线相吻合的方案作为推荐方案,该方案不仅能满足四级航道尺度要求,而且具有工程量省、洪水期水位壅高值小的优点。试验还对不同丁坝型式、坝的纵向间距及坝头水流流速等进行了研究和讨论。

Test Study on the Waterway Regulation of Hanjiang River (the Reach from Wangjiazui to Xuejianao)

On the basis of analyzing the flow and sediment conditions of the reach from Wangjiazui to Xuejianao, the cause of impeding navigation is pointed out, and the regulation priciple and the charecteristic values for each rigid -bed modle test are proposed in this paper. After the verification test, several tens of tests on 7 series of plan composed of 3 different widths and trends of normal lines and 3 different cross -sections of channalling viere Performed. Therefor, it's proposed that the width of normal line be 550 mand the trend be coincident with that on the main thread in the dry season of 1987. This proposal can not only meet the needs of the dimension of 4 scale channel, but also has the advantages of less amount of work and small rising value of the water level in flood seasons. During the test study, different types of groins, longitudinal distances and flow velocities at groin heads were discussed