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发明授权
CN101029519B 大跨度双向预应力索安装方法 有权

大跨度双向预应力索安装方法
摘要：
一种大跨度双向预应力索安装方法，先架设拼装平台、短滑道和穿索支撑系统；在拼装平台上拼装好三榀钢桁架后，将第一榀钢桁架滑移出拼装平台至短滑道的悬挑处，将横向预应力索的索端牵引到第一榀钢桁架的铸钢节点处，将横向预应力索的索端与铸钢节点固定连接；待第五榀钢桁架拼装好后，将第三榀钢桁架滑移出拼装平台至短滑道的悬挑处，在第三榀钢桁架的每个铸钢节点下面固定连接钢撑杆和索夹节点及横向预应力索；滑到第四榀时，安装好钢撑杆后，将纵向预应力索和横向预应力索与索夹节点连接，如此循环，完成所有索体的安装，张拉后形成双向预应力空间张拉索网。解决了省工省时地安装大跨度双向预应力索、实现立体交叉施工的技术问题。
摘要（英）：

A construction method of large span two directional prestressed cables follows the steps as: fabricate working flat, short slid rail and sling supporting system; after fabrication of three trusses on working flat, move one to the hanging end of the short slid rail; thread and fix a lateral prestressed sling to the cast steel node on the truss; after fabrication of five trusses on working flat, move the third one to the hanging end of the short slid rail; fix on each cast steel node with steel supporting pole, sling clip and lateral prestressed sling; for the forth truss, after fixed the steelsupporting pole, connect vertical and lateral prestressed sling to the node; repeat the previous steps till finished and tighten the slings.

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