针对大跨度悬索桥主缆系统施工存在的一些技术难题，介绍近年国内3座三塔悬索桥主缆系统施工技术方面所做的创新和改进。通过使主索鞍底面在底板上直接滑移，简化主索鞍滑动副结构，方便施工过程索鞍顶推；设计制造支座型散索鞍结构，改善散索鞍摆动性能；采用左右对合的双吊耳板索夹结构，改善索夹结构受力性能；采用了主缆PPWS索股水平成盘放索架设方法，减少PPWS索股架设“呼啦圈”和散股问题。针对索鞍槽和主缆索股的抗滑移问题，探索应用了中塔主索鞍加厚鞍槽隔板和91丝规格PPWS索股增加“填充钢丝”的密实整形入鞍等方法。%In the light of some technical problems existing in the construction of the main cable systems of long span suspension bridges ,the innovation and improvement having been made in the recent years for the construction techniques for the three long span three‐tower suspension bridges in China are presented .By sliding the bottom of a tower saddle of the three‐tower suspension bridges directly on the base plate of the saddle ,the sliding set structure for the saddle is simplified and the pushing of the saddle in the construction is hence facilitated .T he bearing type splay saddle is designed and fabricated and the pendulating function of the saddle is improved .The application of the double lifting ear plates cable band of left and right halves improves the mechanical behavior of the cable band .The method of erecting the prefabricated parallel wire strands (PPWS) for the main cable ,using the horizontally PPWS unreeling in each reel minimizes the problems of the PP‐WS hula hooping and loosening in the erection .To cope with the problem of sliding resistance of the PPWS in the tower saddle trough ,the method of densely reshaping and setting the PPWS in the intermediate tower saddle by thickening the saddle trough partition plates and by adding the“filler wires” to the PPWS of 91 wires has been studied and applied .
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