高坝通航建筑物通航隧洞断面经济性分析

针对未来即将有所发展的高坝通航建筑物通航隧洞设计领域,结合船舶临界航速的计算公式,以溪洛渡枢纽通航隧洞为例进行了隧洞断面经济性分析方面的研究。提出隧洞断面经济性分析的思路应该结合通航建筑物单向过闸时间来确定隧洞内水域的断面系数,最佳的原则是让船舶通过隧洞的时间与通航建筑物单向过闸时间基本相等,使二者匹配起来,然后通过隧洞长度与航行时间计算船舶的设计航速,并由此反算断面系数和进行断面尺寸的设计,从而达到通过能力与工程投资额的最佳平衡点。

Economic analysis of navigable tunnel section of high dam

According to the future development of high dam navigation structures of tunnel design,combined with the calculation formula of the critical speed of the ship,taking Xiluodu tunnel as an example,the tunnel economy is analysed.We put forward that the analysis of tunnel section economic should be combined with the one-way time through the navigation structure to determine the cross section coefficient of tunnel water,and the best principle is to make the ship through the tunnel of time and one-way time through the navigation structure is basically the same,so the two match.The design speed of the ship is calculated through the tunnel length and travel time,and the cross section coefficient and the design of section size are get,so as to the best balance between transit capacity and engineering investment is achieved.