目前水文缆道的循回索走线形式大多数是采取开口式(开口游轮式是属开口式的一例)。用这种形式,对于大跨度的缆道都存在着一个垂度过大的问题。为了解决这个问题,目前有两种处理方法,一种叫“支索架法”;另一种叫“张力轮法”。“支索架法”是采用一种由钢材制成的支架固定在主索上,然后将循回索跨在支架的滑轮上使循回索不致下垂太多。而采用支索架的往往都不止一个,而是采用多个均匀悬挂在主索的整个跨度内,这就增加了缆道布局的复杂性,同时还加重了主索的负担。且支索架本身的安装维修比较困难,采用 At present, most of hydrological cableway recursive cables take the form of an open type (an open wheeled type is an open type). In this form, there is a problem of over-sag for long-span cableways. In order to solve this problem, there are two kinds of treatment methods at present, one is called the “cable support method” and the other is called “tension wheel method.” “Shelf method” is the use of a bracket made of steel fixed to the main cable, and then will be back to the cable across the bracket pulley so that the loop will not sag too much. The use of cable shelves are often more than one, but the use of multiple uniform suspension in the main cable throughout the span, which increases the complexity of the cableway layout, but also increased the burden on the main cable. And support stand installation and maintenance of their own more difficult to adopt