RESEARCH ON INSTALLATION CONTROL TECHNOLOGY OF ARCH RIBS FOR A LARGE-SPAN STEEL BOX ARCH BRIDGE
The main bridge of Yanhe Bridge is a 183m steel box arch bridge with a 10° inclination arch rib,and its three-dimensional structure is complicated.The linear shape after forming is the control core of steel structure hoisting construction.According to the actual construction environment conditions of the project,the steel box arch is installed by adopting the overall lifting scheme of large segments,the hoisting and assembling scheme of crane and the hoisting and assembling scheme of cable crane.The steel box arch is installed by the hanging cable-stay method,and the control measures such as measuring and controlling network layout,initial tension of anchor cable,closing temperature and pre-lifting value are formulated.Finally,the installation accuracy of arch rib of bridge along the river is improved,which can provide technical support for the smooth closure of bridge along the river.
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维普
