国家天文台FAST工程索网索力调节施工技术

国家天文台FAST工程球面索网结构由2225个节点,6670根主索以及2225根下拉索组成,该结构安装完成后需要后续对索网索力进行调节来达到该结构的设计要求。FAST工程球面索网通过150根边缘主索与圈梁连接,边缘主索采用长度可调节的拉索结构,其它主索均为长度固定的不可调拉索结构,索网节点通过2225根下拉索连接于地锚。索网几何位置由边缘索调整实现,索网节点后期的变位通过下拉索调整实现。本文将介绍FAST球面索网结构边缘主索索力调节的施工工艺。

Construction technology of cable force regulation in FAST project of National Astronomical Observatories

The spherical cable network structure of the FAST project of the National Astronomical Observatory is composed of 2225 nodes,6670 main cables and 2225 lower cables. After the installation of the structure, the cable force of the cable network needs to be adjusted to meet the design requirements of the structure. The spherical cable network of FAST Project is connected with the ring beam through 150 edge main cables, the edge main cable adopts the cable structure with adjustable length, and the other main cables are the non-adjustable cable structure with fixed length. The cable network nodes are connected to the ground anchor through 2225 lower cable. The geometric position of the cable network is realized by the adjustment of the edge cable, and the late change of the node of the cable network is realized by the adjustment of the lower cable. This paper introduces the construction technology of the main cable force adjustment of the edge of FAST spherical cable network structure.