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山岭重丘区修建高速公路通过深沟峡谷多采用大跨径桥梁跨越,由于桥梁高度大,下部构造多采用高桥墩。高桥墩达到一定高度时采用空心薄壁式墩身。高墩身施工方法较多,有滑模、爬模、翻模等多种,这些方法各有优缺点。本文介绍永宁高速公路A4合同段大溪丰大桥箱型空心板薄壁高墩身塔吊提升翻模施工技术,对高墩施工具有一定的参考价值。
The construction of expressway in the mountainous heavy hilly area uses the long-span bridge to cross the deep-groove canyon. Due to the high bridge height, the high-pier in the lower structure is mostly used. Takahashi pier to reach a certain height hollow hollow pier body. There are many high pier construction methods, such as sliding mode, climbing mode and turning mode. Each of these methods has advantages and disadvantages. This paper introduces the construction technology of the tower crane of the Daxifeng large bridge box-type hollow slab in the Contract Section of Yongning Expressway A4 to improve the mode of raising and knocking the tower crane, which is of certain reference value to the high pier construction.