国家天文台FAST工程索网安装施工技术

国家天文台FAST工程索网安装共包括2225个主索节点、6670根主索和2225根下拉索,所有安装工作均需在空中完成,要求精度高,施工难度大。为了避免索网在安装过程中应力过大,并满足圈梁受力要求,施工过程中将整个索网对称等分为5个施工区域,每个区域都同步施工。施工时,需要采用大量悬空索道进行拼装,其中,施工通道为固定索道,需要承载较大受力,施工索道则随安装进度不断转移。

Cable network installation and construction technology of FAST project of National Astronomical Observatories

The cable network installation of the National Astronomical Observatories FAST project includes 2225 main cable nodes, 6670 main cables and 2225 lower cables, all installation work needs to be completed in the air, requiring high precision and difficult construction. In order to avoid excessive stress in the cable network during installation and meet the stress requirements of the ring beam, the entire cable network is divided into 5 construction areas symmetrically and equally during construction, and each area is constructed simultaneously. During construction, a large number of suspended ropeways are required for assembly. Among them, the construction channel is a fixed ropeway, which needs to bear a large force, and the construction ropeway is constantly transferred with the installation progress.