一、概述等截面悬链线双曲无铰拱渡槽(简称为双曲拱渡槽),是由双曲拱桥移植过来的,不仅具有投资省、用材少、施工进度快的优点,而且结构轻巧,造型美观,富有民族特色,因而得到了迅速地发展。双曲无铰拱是个较复杂的超静定结构,内力计算相当繁复。过去为了简便,无论是公路桥还是渡槽,大都用“五点重合法”来分析主拱圈的内力。即在荷载作用下,只要 First, an overview of the cross-section catenary non-arched arch aqueduct (referred to as the double arch aqueduct), is a double curved arch bridge transplant, not only has the advantages of investment province, less timber, construction speed, and the structure of lightweight, Beautiful appearance, full of ethnic characteristics, which has been rapid development. Hyperbolic non-hinged arch is a more complex statically indeterminate structure, internal force calculation is quite complicated. In the past for the sake of simplicity, whether it is a highway bridge or aqueduct, mostly using the “five coincidence method” to analyze the main arch of the internal forces. That is, under the action of load, as long as