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滨州黄河公路大桥主桥为6跨连续PC箱梁三塔双索面斜拉桥,斜拉索为直径7mm的镀锌高强低松弛钢丝。斜拉索安装分为放索、安装、牵引、张拉4道工序。为保护斜拉索PE保护层,斜拉索吊装时采用尼龙绳,运输采用自制的运索平车,运索平车设有导向转盘,放缩盘增设刹车装置。在塔上安装大吨位的斜拉索时首次采用两道索夹牵引的方法,减小了导链引索的引力,有效避免了斜拉索的滑脱。斜拉索张拉分3次进行,第1次张拉时为避免引索时刮伤保护层,针对挂篮悬浇端和支架现浇端的特点,分别设计制作了挂篮端引索支撑架和现浇端引索支撑架。斜拉索安装工艺改进后,有效地保护了斜拉索层,提高了工作效率和安全性。
The main bridge of Binzhou Yellow River Highway Bridge is a 6-span continuous PC box girder with three towers and two cable plane cable-stayed bridges. The stay cables are 7mm diameter galvanized high strength and low relaxation steel wires. Diagonal cable installation is divided into put cable, installation, traction, tensioning 4 processes. In order to protect the PE cable of the stay cable, the nylon cable is adopted for the cable hoisting. The self-made flat cable car is used for transportation. The guide car is provided for the flat cable car and the brake device is provided for the shrink disc. When installing large-tonnage diagonal cable on the tower, the method of two cable clamps is adopted for the first time to reduce the gravitation of the lead cable and effectively avoid the slippage of the cable. Stay cable tensioning points 3 times, the first time to avoid scratching when the lead is stretched protective layer, hanging hanging end of the hanging basket and the stent pouring end of the characteristics were designed to make the end of the basket end of the cable support And cast-in end lead support. After the improvement of the installation process of the stay cables, the stay cables are effectively protected and the working efficiency and safety are improved.